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Evaluation on a double-chamber gas-liquid phase discharge reactor for benzene degradation
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作者 商克峰 张琦 +3 位作者 鲁娜 姜楠 李杰 吴彦 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2019年第7期135-144,共10页
A double-chamber gas-liquid phase DBD reactor(GLDR), consisting of a gas-phase discharge chamber and a gas-liquid discharge chamber in series, was designed to enhance the degradation of benzene and the emission of NOx... A double-chamber gas-liquid phase DBD reactor(GLDR), consisting of a gas-phase discharge chamber and a gas-liquid discharge chamber in series, was designed to enhance the degradation of benzene and the emission of NOx. The performance of the GLDR on discharge characteristics,reactive species production and benzene degradation was compared to that of the single-chamber gas phase DBD reactor(GPDR). The effects of discharge gap, applied voltage, initial benzene concentration, gas flow rate and solution conductivity on the degradation and energy yield of benzene in the GLDR were investigated. The GLDR presents a higher discharge power, higher benzene degradation and higher energy yield than that of the GPDR. NO2 emission was remarkably inhibited in the GLDR, possibly due to the dissolution of NO2 in water. The benzene degradation efficiency increased with the applied voltage, but decreased with the initial concentration, gas flow rate, and gas discharge gap, while the solution conductivity presented less influence on benzene degradation. The benzene degradation efficiency and the energy yield reached 61.11% and 1.45 g k Wh-1 at 4 mm total gas discharge gap, 15 k V applied voltage, 200 ppm benzene concentration,0.2 L min-1 gas flow rate and 721 μS cm-1 water conductivity. The intermediates and byproducts during benzene degradation were detected by FT-IR, GC-MS and LC-MS primarily, and phenols,COx, and other aromatic substitutes, O3, NOx, etc, were determined as the main intermediates.According to these detected byproducts, a possible benzene degradation mechanism was proposed. 展开更多
关键词 dielectric barrier DISCHARGE GAS-LIQUID hybrid DISCHARGE BENZENE DEGRADATION REACTIVE species nitrogen dioxide
A DFT Study on the Adsorption of CO2 Molecules on CaO(001) Surface at Different Coverages 预览
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作者 陈红 章永凡 +3 位作者 李奕 黄淑萍 齐嘉媛 刘蓉 《结构化学》 SCIE CAS CSCD 2019年第1期17-24,1共9页
The CO2 adsorption on CaO(001) surface at different coverages from 1/9 monolayer(ML) to 1 ML has been investigated using density functional theory calculations. With the analysis of the most stable adsorption structur... The CO2 adsorption on CaO(001) surface at different coverages from 1/9 monolayer(ML) to 1 ML has been investigated using density functional theory calculations. With the analysis of the most stable adsorption structures at different coverages, the mechanism of CaO(001)surface carbonating into CaCO3 has been explored. At low coverages(≤1/3 ML), CO2 molecule prefers sitting in parallel pattern on the CaO(001) surface, while the structure of the CaO(001)surface remains unchanged. At medium coverage(4/9 ~ 2/3 ML), the repulsive interactions between oxygen atoms of CO2 become stronger, and the calcium carbonation structure appears on the CaO(001) surface. At high coverage( ≥ 7/9 ML), the structure of the CaO(001) surface is deeply damaged, and a few CO2 molecules have penetrated into the surface and bound to the O atom of the second layer(sub-surface), eventually forming the layered structure of CaCO3.Additionally, herein has discussed the simulation of HREELS and thermodynamical stability of these structures at different coverages. 展开更多
关键词 CARBON dioxide CaO(001)surface DFT DIFFERENT coverages
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Development of a particle swarm optimization based support vector regression model for titanium dioxide band gap characterization 预览
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作者 Taoreed O.Owolabi 《半导体学报:英文版》 EI CAS CSCD 2019年第2期49-55,共7页
Energy band gap of titanium dioxide(TiO2) semiconductor plays significant roles in many practical applications of the semiconductor and determines its appropriateness in technological and industrial applications such ... Energy band gap of titanium dioxide(TiO2) semiconductor plays significant roles in many practical applications of the semiconductor and determines its appropriateness in technological and industrial applications such as UV absorption, pigment,photo-catalysis, pollution control systems and solar cells among others. Substitution of impurities into crystal lattice structure is the most commonly used method of tuning the band gap of TiO2 for specific application and eventually leads to lattice distortion. This work utilizes the distortion in the lattice structure to estimate the band gap of doped TiO2, for the first time, through hybridization of a particle swarm optimization algorithm(PSO) with a support vector regression(SVR) algorithm for developing a PSO-SVR model. The precision and accuracy of the developed PSO-SVR model was further justified by applying the model for estimating the effect of cobalt-sulfur co-doping, nickel-iodine co-doping, tungsten and indium doping on the band gap of TiO2 and excellent agreement with the experimentally reported values was achieved. Practical implementation of the proposed PSO-SVR model would further widen the applications of the semiconductor and reduce the experimental stress involved in band gap determination of TiO2. 展开更多
关键词 band gap LATTICE DISTORTION crystal LATTICE parameters particle SWARM optimization support vector regression titanium dioxide
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Sensitivity analysis of using diethanolamine instead of methyldiethanolamine solution for GASCO’S Habshan acid gases removal plant
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作者 Samah Zaki NAJI Ammar Ali ABD 《能源前沿:英文版》 CSCD 2019年第2期317-324,共8页
Sweeting natural gas processes are mainly focused on removing carbon dioxide (CO2) and hydrogen sulfide (H2S). The high-energy requirements and opera-tional limitations make amine absorption process sensitive to any c... Sweeting natural gas processes are mainly focused on removing carbon dioxide (CO2) and hydrogen sulfide (H2S). The high-energy requirements and opera-tional limitations make amine absorption process sensitive to any change in conditions. This paper presented a steady- state simulation using Hysys to reasonably predict removal amounts of carbon dioxide and hydrogen sulfide from natural gas with the diethanolamine (DEA) solvent. The product specifications are taken from the real plant (GASCO5S Habshan) which uses the methyldiethanola-mine (MDEA) solvent, while this simulation uses DEA under the same operation conditions. First, the simulation validation has been checked with the data of the real plant. The results show accurate prediction for CO2 slippage and accepted agreement for H2S content compared with the data of the plant. A parametric analysis has been performed to test all possible parameters that affect the performance of the acid gases removal plant. The effects of operational parameters are examined in terms of carbon dioxide and hydrogen sulfide contents in clean gas and reboiler duty. 展开更多
关键词 ACID gas DIETHANOLAMINE methyldiethanola-mine CARBON dioxide capturing HYSYS simulation
Geoengineering and the blockchain: Coordinating Carbon Dioxide Removal and Solar Radiation Management to tackle future emissions
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作者 Andrew LOCKLEY Zhifu MI D'Mans COFFMAN 《工程管理前沿:英文版》 2019年第1期38-51,共14页
Geoengineering is a proposed response to anthropogenic global warming (AGW). Conventionally it consists of two strands: Solar Radiation Management (SRM), which is fast-acting, incomplete but inexpensive, and Carbon Di... Geoengineering is a proposed response to anthropogenic global warming (AGW). Conventionally it consists of two strands: Solar Radiation Management (SRM), which is fast-acting, incomplete but inexpensive, and Carbon Dioxide Removal (CDR), which is slower acting, more expensive, and comprehensive. Pairing SRM and CDR offers a contractually complete solution for future emissions if effectively-scaled and coordinated. SRM offsets warming, while CDR takes effect. We suggest coordination using a blockchain, i.e. smart contracts and a distributed ledger. Specifically, we integrate CDR futures with time and volume-matched SRM orders, to address emissions contractually before release. This provides an economically and environmentally proportionate solution to CO2 emissions at the wellhead, with robust contractual transparency, and minimal overhead cost. Our proposal offers a 'polluter pays' implementation of Long & Shepherds SRM 'bridge' concept. This 'polluter geoengineers' approach mandates and verifies emissionslinked payments with minimal friction, delay, or cost. Finally, we compare alternative market designs against this proposal, finding that this proposal offers several advantages. We conclude that blockchain implementation of the 'polluter geoengineers' approach is attractive and feasible for larger wellhead contracts. We also identify a handful of advantages and disadvantages that merit further study. 展开更多
关键词 GEOENGINEERING Solar Radiation MANAGEMENT Carbon Dioxide Removal FUTURES MARKETS smart contracts blockchain
Enhancement of corona discharge induced wind generation with carbon nanotube and titanium dioxide decoration
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作者 叶建春 李俊 +2 位作者 陈晓红 黄素梅 欧阳威 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第9期282-287,共6页
Dip-coated double-wall carbon nanotubes(DWCNTs) and titanium dioxide(TiO2) sol have been prepared and smeared onto the tip of a conductive iron needle which serves as the corona discharge anode in a needle-cylinder co... Dip-coated double-wall carbon nanotubes(DWCNTs) and titanium dioxide(TiO2) sol have been prepared and smeared onto the tip of a conductive iron needle which serves as the corona discharge anode in a needle-cylinder corona system.Compared with the discharge electrode of a CNT-coated needle tip, great advancements have been achieved with the TiO_2/CNT-coated electrode, including higher discharge current, ionic wind velocity, and energy conversion efficiency,together with lower corona onset voltage and power consumption.Several parameters related to the discharge have been phenomenologically and mathematically studied for comparison.Thanks to the morphology reorientation of the CNT layer and the anti-oxidation of TiO_2, better performance of corona discharge induced wind generation of the TiO2/CNT-coated electrode system has been achieved.This novel decoration may provide better thoughts about the corona discharge application and wind generation. 展开更多
关键词 CORONA discharge INDUCED WIND WIND velocity carbon NANOTUBES titanium dioxide
Composite Electrodeposited Pb02/Co304 on a Ti Substrate as Positive Electrode Materials for a Hybrid Supercapacitor 预览
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作者 丹媛媛 孙园园 +5 位作者 卢晨 冯伟超 刘刚 程小芳 陈立庄 程科 《结构化学》 SCIE CAS CSCD 2019年第6期882-892,共11页
PbO2/Co3O4 composites were prepared on a Ti substrate by means of a composite electrodeposition method in Pb2 plating solution containing dissolved nano-Co3O4 particles.X-ray diffraction(XRD),scanning electron microsc... PbO2/Co3O4 composites were prepared on a Ti substrate by means of a composite electrodeposition method in Pb2 plating solution containing dissolved nano-Co3O4 particles.X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive spectrometry(EDS)and transmission electron microscopy(TEM)were used to characterize the chemical composition and morphology of the PbCh/CogC^composites.The electrochemical and capacitanee performance of the composites were investigated by cyclic voltammetry(CV),charge-discharge tests and electrochemical impedance(EIS).The results indicate that the composites comprise rutile phase CO3O4 and 0?PbC)2?In addition,the surface of the composite electrode is rough and porous.The PbO2/Co3O4 composites exhibit a high specific capacitance up to 215 F/g,which is ten times higher than that of the pure-PbO?and two times higher than that of the pure-Co3O4 in 1 mol/L NaOH electrolytes. 展开更多
关键词 LEAD dioxide ELECTRODE hybrid super-capacitor composite ELECTRODEPOSITION cobaltosic OXIDE
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Analysis of the flow characteristics of the high-pressure supercritical carbon dioxide jet 预览
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作者 Man Huang Yong Kang +2 位作者 Xiao-chuan Wang Yi Hu Can Cai 《水动力学研究与进展:英文版》 SCIE EI CSCD 2019年第2期389-399,共11页
The supercritical carbon dioxide(SC-CO2)jet has a wide application prospect for rock breaking and jet fracturing in the development of the unconventional shale energy,due to its special physicochemical properties.To i... The supercritical carbon dioxide(SC-CO2)jet has a wide application prospect for rock breaking and jet fracturing in the development of the unconventional shale energy,due to its special physicochemical properties.To investigate its jet flow characteristics,the high-speed photography is used in experiments and the simulations through a compressible numerical model are carried out.It is shown that the jet flow field can be divided into three typical regions,the mixing layer possesses the same characteristics as a gas/gas turbulent mixing layer,with the divergent angles evidently smaller than those of the incompressible jets.The predicted results by the numerical model are in a good agreement with those of the experimentations.Through the dimensionless analysis,the potential core shows a length of about 9d and an increasing trend with the increase of the inlet pressure while the decay rate shows a decreasing trend,and the radial profiles consistent well with the 41 Ue-η''normalized method.In addition,a significant temperature drop of the SC-CO2 is observed between the nozzle inlet and the exit.A simple and convenient semi-empirical equation for calculating this temperature variation is deduced.Finally,the flow characteristics suggest that the SC-CO2 jet should be treated as a compressible jet. 展开更多
关键词 SUPERCRITICAL carb on dioxide JET FLOW characteristics EXPERIMENT and simulation UNCONVENTIONAL SHALE energy
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Dynamically Tunable Perfect Absorbers Utilizing Hexagonal Aluminum Nano-Disk Array Cooperated with Vanadium Dioxide
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作者 周鹏 郑改革 +2 位作者 陈云云 咸冯林 徐林华 《中国物理快报:英文版》 SCIE CAS CSCD 2019年第1期19-23,共5页
A tunable perfect absorber composed of hexagonal-arranged aluminum nano-disk array embedded in the vanadium dioxide (VO2)film is proposed.The aim is to achieve the tunability of resonance absorption peak in the visibl... A tunable perfect absorber composed of hexagonal-arranged aluminum nano-disk array embedded in the vanadium dioxide (VO2)film is proposed.The aim is to achieve the tunability of resonance absorption peak in the visible and near-infrared regimes.Numerical results reveal that the absorption peak achieves a large tunability of 76.6% while VO2 undergoes a structural transition from insulator phase to metallic phase.By optimizing the structural parameters,an average absorption of 95% is achieved from 1242 to 1815nm at the metallic phase state.In addition,the near unity absorption can be fulfilled in a wide range of incident angle (0°-60°)and under all polarization conditions.The method and results presented here would be beneficial for the design of active optoelectronic devices. 展开更多
关键词 VANADIUM Dioxide HEXAGONAL ALUMINUM nanodisc array ABSORBENT
The Principle of Detect SO2 Concentration by Using the Electrochemical Method in Ionic Liquid
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作者 HUANG Qing HU Yang +2 位作者 WANG Jiakai JIANG Kai WU Tian 《武汉大学学报:自然科学英文版》 CAS CSCD 2019年第5期400-404,共5页
The reduction of SO2 with different concentrations at a platinum microelectrode was investigated by cyclic voltammetry(CV) in 1-(butyl)-3-methylimidazolium hexafluorophosphate([Bmim]PF6). We speculated that the reacti... The reduction of SO2 with different concentrations at a platinum microelectrode was investigated by cyclic voltammetry(CV) in 1-(butyl)-3-methylimidazolium hexafluorophosphate([Bmim]PF6). We speculated that the reaction mechanism of reduction may form a macromolecular complex, and the higher the concentration of SO2, the larger the molecular weight of the complex. The higher the concentration of SO2, the greater the diffusion coefficient of SO2 in [Bmim]PF6. There is a good quadratic function relationship between the reduction peak current and SO2 concentrations in the range from 2% to 100%, which promises a kind of ionic liquid electrolyte for the detection of SO2 gas with a wide range of concentrations. 展开更多
关键词 IONIC liquids sulfur dioxide CYCLIC VOLTAMMETRY chronoamperometric
Evaluation on Fabrication and Properties of Composite Polyurethane Coatings with Wollastonite Partially Substituting for Rutile Titanium Dioxide 预览
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作者 Xiaojing Wang Wei Zhang +2 位作者 Yangyang Yan Jing Wang Xiyao Wang 《天津大学学报:英文版》 EI CAS 2019年第3期293-300,共8页
This study aims to prepare a composite polyurethane coating through a facile synthesis process.Titanium dioxide,which is a component of the prepared hydroxyl acrylic resin polyurethane varnish,was partially substitute... This study aims to prepare a composite polyurethane coating through a facile synthesis process.Titanium dioxide,which is a component of the prepared hydroxyl acrylic resin polyurethane varnish,was partially substituted by wollastonite,and an optimal substitution ratio was obtained.Analyses based on scanning electron microscope,powder X-ray diffraction,and Raman scattering measurements demonstrated that the addition of wollastonite caused nearly no change in the basic structure of the coating.Coating with a substitution ratio of 25% showed high thermal stability,good cover effect,considerable moisture-proof and water resistance ability,great acidic and basic resistance,and improved performance and hardness in performance tests.Furthermore,the production cost was reduced significantly at this substitution ratio. 展开更多
关键词 POLYURETHANE coating WOLLASTONITE RUTILE titanium dioxide HYDROXYL ACRYLIC acid Thermal stability
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Self-cleaning Anti-fouling TiO2/Poly(aryl ether sulfone) Composite Ultrafiltration Membranes
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作者 JIANG Hongchuan YANG Xia +3 位作者 FENG Yong WANG Xinyu GENG Zhi HUO Mingxin 《高等学校化学研究:英文版》 SCIE CAS CSCD 2019年第4期714-720,共7页
A series of novel TiO2/poly(aryl ether sulfone) ultrafiltration membranes with anti-fouling and self-cleaning properties was designed and prepared. First, anti-photocatalytic degraded fluorine contained polv(aryl ethe... A series of novel TiO2/poly(aryl ether sulfone) ultrafiltration membranes with anti-fouling and self-cleaning properties was designed and prepared. First, anti-photocatalytic degraded fluorine contained polv(aryl ether sulfone) matrix(PAES-F) was synthesized. Then the composite membranes were prepared via TiO2 nanopartides and PAES-F polymer matrix by solution blending and non-solvent induced phase inversion methods. Further, separation efficiency, fouling behavior and self-cleaning property of the composite ultrafiltration(UF) membranes were investigated by dead-end filtration experiments using a polyacn lamide solution. The composite UF membranes exhibited outstanding self-cleaning efficiency and anti-photocatalytic degraded property after exposure to simulated sunliglit irradiation.The water flux recovery ratios(FRR)of the optimal composite UF membranes could reach 74.24%, which was attributable to photocatalytic degradation of the organic contaminant by TiO2. And the retention rates of the composite UF membranes could maintain over 97%, which indicated the excellent photocatalytic degradation resistance of the fluorine contained PAES-F matrix. The novel high perfomiance composite UF membranes have a broad application prospect in water treatment. 展开更多
关键词 Poly(aryl ETHER sulfone) Ultrafiltration ANTI-FOULING SELF-CLEANING Titanium dioxide
Operando FT-IR study on basicity improvement of Ni(Mg,AI)O hydrotalcitederived catalysts promoted by glow plasma discharge
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作者 R DEBEK D WIERZBICKI +3 位作者 M MOTAK M E GALVEZ P DA COSTA F AZZOLINA-JURY 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2019年第4期123-136,共14页
CO2 adsorption on the surface of hydrotalcite-derived mixed oxide catalysts was investigated under low pressure glow discharge plasma in opercindo conditions via FT-IR spectroscopy.Nickel catalysts were promoted with ... CO2 adsorption on the surface of hydrotalcite-derived mixed oxide catalysts was investigated under low pressure glow discharge plasma in opercindo conditions via FT-IR spectroscopy.Nickel catalysts were promoted with various transition metal species(Ce,Fe,La,Zr)to influence their physico-chemical properties.Fe and Zr species were successfully incorporated into hydrotalcite brucite layers.After calcination formed a single phase with Ni(Mg,A1)O mixed oxide,while La and Ce species formed separate phases.This had a consequence in the distribution of surface basic sites as well as in the affinity to CO produced upon CO2 dissociation in plasma.Plasma treatment activated the surface of prepared materials and changed their properties via the generation of strong basic sites associated with low coordinated surface oxygen anions.Moreover,the CO2 adsorption capacity of prepared materials increased after plasma treatment. 展开更多
关键词 plasma GLOW DISCHARGE BASICITY HYDROTALCITE carbon dioxide
Characteristics and influence factors of NO2 exchange flux between the atmosphere and P. nigra
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作者 Chun Chen Yuzheng Wang +5 位作者 Yuanyuan Zhang Chengtang Liu Xiaoxiu Lun Yujing Mu Chenglong Zhang Junfeng Liu 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第10期155-165,共11页
Nitrogen dioxide(NO2)is an important substance in atmospheric photochemical processes and can also be absorbed by plants.N02 fluxes between the atmosphere and P.nigrc seedlings were investigated by a double dynamic ch... Nitrogen dioxide(NO2)is an important substance in atmospheric photochemical processes and can also be absorbed by plants.N02 fluxes between the atmosphere and P.nigrc seedlings were investigated by a double dynamic chambers method in Beijing from June 15to September 3,2017.The range of N02 exchange fluxes between P.nigra seedlings and the atmosphere was from-14.6 to 0.8 nmol/(m2.sec)(the positive data represent N02 emissior from trees,while the negative values indicate absorption).Under ambient concentrations the mean NO2 flux during the fast-growing stage(Jun.15-Aug.4)was-3.0 nmol/(m2·sec)greater than the flux of-1.5 nmol/(m2-sec)during the later growth stage(Aug.8-Sept.3)The daily exchange fluxes of NO2 obviously fluctuated.The fluxes were largest in the morning and decreased gradually over time.Additionally,the N02 fluxes were larger undei high light intensities than under low light intensities during the whole growth period.The effects of temperature on N02 fluxes were different under two growth periods.The NO2exchange fluxes were larger in a range of temperatures close to 44℃in the fast-growing stage,whereas there were no evident differences in N02 exchange fluxes under widel differing temperatures in the later growth stage.Under polluted conditions,the uptake ability of N02 was weakened.Additionally,the compensation point of N02 was 5.6 ppb ir the fast-growing stage,whereas it was 1.4 ppb in the later growth stage.The depositior velocities of NO2 were between 0.3 and 2.4 mm/sec. 展开更多
关键词 NITROGEN dioxide Exchange FLUX P.nigra COMPENSATION POINT
Ultra-microporous Metal-organic Framework with High Concentration of Free Carboxyl Groups and Lewis Basic Sites for CO2 Capture at Ambient Conditions 预览
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作者 梁林锋 江飞龙 +2 位作者 陈其辉 袁大强 洪茂椿 《结构化学》 SCIE CAS CSCD 2019年第4期559-565,共7页
How to rationally design effective and practical CO2 adsorbent is a great challenge. Herein, an ultra-microporous metal-organic framework(FJI-H19) with high concentration of free carboxyl groups and uncoordinated Lewi... How to rationally design effective and practical CO2 adsorbent is a great challenge. Herein, an ultra-microporous metal-organic framework(FJI-H19) with high concentration of free carboxyl groups and uncoordinated Lewis basic sites has been synthesized from a multi-dental ligand with a high proportion of polar CO2-philic atoms. FJI-H19 displays a relatively high CO2 volumetric uptake(120 cm3?cm–3) with high selectivity under practical atmosphere(298 K and 1 bar). Further researches demonstrate that such high adsorption results from an unusual synergistic effect from free carboxyl group and uncoordinated N atoms. This result will provide a potential strategy for developing more effective and pratical CO2 adsorbent based on MOFs. 展开更多
关键词 METAL-ORGANIC framework adsorption carbon dioxide free CARBOXYL group SYNERGISTIC effect
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Cloride-derived copper electrode for efficient electrochemical reduction of CO2 to ethylene
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作者 Tian Qin Yao Qian +1 位作者 Fan Zhang Bo-Lin Lin 《中国化学快报:英文版》 SCIE CAS CSCD 2019年第2期314-318,共5页
The electrochemical reduction of carbon dioxide can convert the greenhouse gas into value-added chemical products or fuels, which provides a promising strategy to address current energy and environmental issues. Incre... The electrochemical reduction of carbon dioxide can convert the greenhouse gas into value-added chemical products or fuels, which provides a promising strategy to address current energy and environmental issues. Increasing the selectivity for C2&C2+ products, particularly ethylene, remains an important goal in this field. We chose cuprous chloride as the catalyst precursor for electrochemical reduction of CO2, which efficiently converted carbon dioxide to ethylene. CuCl powder exhibited a maximum ethylene faradaic efficiency (FE) of 37%,ethylene partial current density of 14.8 mA/cm2, and selectivity of 57.5% for C2&C2+ products at-1.06 V (vs. reversible hydrogen electrode, RHE). Electron microcopy (TEM, SEM) and time-resolved ex situ X-ray diffraction (XRD) demonstrated that the catalyst was transformed gradually into a mixed phase of copper and cuprous oxide, with the morphological change into a cubic structure during reduction process. The presence of Cu1+ and the unique electrode morphology may simultaneously lead to the enhanced electrochemical activity. 展开更多
关键词 Cuprous CHLORIDE ETHYLENE ELECTROCHEMISTRY Carbon dioxide REDUCTION MORPHOLOGY
Estimating source strengths of HCl and SO2 emissions in the flue gas from waste incineration
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作者 Hua Zhang Siyuan Yu +1 位作者 Liming Shao Pinjing He 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第1期370-377,共8页
HCl and SO2 emission is one of the major concerns related to municipal solid waste incinerator(MSWI). In this study, a material flow analysis model was developed to estimate the HCl and SO2 concentrations in the MSWI ... HCl and SO2 emission is one of the major concerns related to municipal solid waste incinerator(MSWI). In this study, a material flow analysis model was developed to estimate the HCl and SO2 concentrations in the MSWI flue gases(FGs), and their concentrations in the full-scale MSWI were monitored. The calculated concentrations of HCl and SO2 in the FG were 770–1300 mg/Nm3 and 150–640 mg/Nm3, respectively, in close agreement with the monitored values. More than 99% of Cl and 92% of S from the FG were captured into solid residues by the air pollution control(APC) systems. Moreover, since only 48.4%–67.5% of Cl and 21.3%–53.4% of S were transferred to the FG from the municipal solid waste(MSW), it was more reliable to estimate the source strengths and release amounts of HCl and SO2 in the FG based on the amounts of Cl and S in the APC residues(AR) and exhaust gas rather than in the MSW. This simple method is easily applicable and the estimated results could provide scientific basis for the appropriate design and operation of the APC systems as well as corrosion control of heat recovery systems. 展开更多
关键词 MUNICIPAL solid waste INCINERATION Acid gas Hydrogen CHLORIDE SULFUR dioxide Source strength
Review of plasma-assisted reactions and potential applications for modification of metal-organic frameworks
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作者 Tingting Zhao Niamat Ullah +1 位作者 Yajun Hui Zhenhua Li 《化学科学与工程前沿:英文版》 EI CAS CSCD 2019年第3期444-457,共14页
Plasma catalysis is drawing increasing attention worldwide. Plasma is a partially ionized gas comprising electrons, ions, molecules, radicals, and photons. Integration of catalysis and plasma can enhance catalytic act... Plasma catalysis is drawing increasing attention worldwide. Plasma is a partially ionized gas comprising electrons, ions, molecules, radicals, and photons. Integration of catalysis and plasma can enhance catalytic activity and stability. Some thermodynamically unfavorable reactions can easily occur with plasma assistance. Compared to traditional thermal catalysis, plasma reactors can save energy because they can be operated at much lower temperatures or even room temperature. Additionally, the low bulk temperature of cold plasma makes it a good alternative for treatment of temperature-sensitive materials. In this review, we summarize the plasmaassisted reactions involved in dry reforming of methane, CO2 methanation, the methane coupling reaction, and volatile organic compound abatement. Applications of plasma for modification of metal-organic frameworks are discussed. 展开更多
关键词 plasma CATALYSIS METHANE carbon dioxide VOCs METAL-ORGANIC frameworks
Titanium dioxide as an adsorbent to enhance the detection ability of near-infrared diffuse reflectance spectroscopy
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作者 Shuyu Wang Jin Zhang +1 位作者 Wensheng Cai Xueguang Shao 《中国化学快报:英文版》 SCIE CAS CSCD 2019年第5期1024-1026,共3页
A method for quantitative determination of fish sperm deoxyribonucleic acid(fsDNA)was developed by using titanium dioxide(TiO2)as an adsorbent and near-infrared diffuse reflectance spectroscopy(NIRDRS).The selective e... A method for quantitative determination of fish sperm deoxyribonucleic acid(fsDNA)was developed by using titanium dioxide(TiO2)as an adsorbent and near-infrared diffuse reflectance spectroscopy(NIRDRS).The selective enrichment of fsDNA was proved by comparing the adsorption efficiency of bovine serum albumin,tyrosine and tryptophan,and the low adsorption background of TiO2 was illustrated by comparing the spectra of four commonly-used inorganic adsorbents(alkaline aluminium oxide,neutral aluminium oxide,nano-hydroxyapatite and silica).The spectral feature of fsDNA can be clearly observed in the spectrum of the sample.Partial least squares(PLS)model was built for quantitative determination of fsDNA using 28 solutions,and 13 solutions with interferences were used for validation of the model.The results showed that the correlation coefficient(R)between the predicted and the reference concentration is 0.9727 and the recoveries of the validation samples are in the range of 98.2%-100.7%. 展开更多
关键词 NEAR-INFRARED DIFFUSE reflectance spectroscopy Quantitative model DETECTION ABILITY Titanium dioxide Fish SPERM DNA
Mass transfer investigation and operational sensitivity analysis of aminebased industrial CO2 capture plant
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作者 Abbas Hemmati Hamed Rashidi 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2019年第3期534-543,共10页
In this article,the industrial process of CO2 capture using monoethanolamine as an aqueous solvent was probed carefully from the mass transfer viewpoint.The simulation of this process was done using Rate-Base model,ba... In this article,the industrial process of CO2 capture using monoethanolamine as an aqueous solvent was probed carefully from the mass transfer viewpoint.The simulation of this process was done using Rate-Base model,based on two-film theory.The results were validated against real plant data.Compared to the operational unit,the error of calculating absorption percentage and CO2 loading was estimated around 2%.The liquid temperature profiles calculated by the model agree well with the real temperature along the absorption tower,emphasizing the accuracy of this model.Operational sensitivity analysis of absorption tower was also done with the aim of determining sensitive parameters for the optimized design of absorption tower and optimized operational conditions.Hence,the sensitivity analysis was done for the flow rate of gas,the flow rate of solvent,flue gas temperature,inlet solvent temperature,CO2 concentration in the flue gas,loading of inlet solvent,and MEA concentration in the solvent.CO2 absorption percentage,the profile of loading,liquid temperature profile and finally profile of CO2 mole fraction in gas phase along the absorption tower were studied.To elaborate mass transfer phenomena,enhancement factor,interfacial area,molar flux and liquid hold up were probed.The results show that regarding the CO2 absorption,the most important parameter was the gas flow rate.Comparing liquid temperature profiles showed that the most important parameter affecting the temperature of the rich solvent was MEA concentration. 展开更多
关键词 Carbon dioxide MONOETHANOLAMINE Rate-base model ENHANCEMENT FACTOR Sensitivity analysis
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