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Superior activity of iron–manganese supported on kaolin for NO abatement at low temperature

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Journal of Environmental Sciences 2020年第2期32卷 237-247页

作者： Xiaobo Wang Jie Zhou Tong Zhao Keting Gui Jia Wang Hywel RThomas School of Environmental Science Nanjing Xiaozhuang UniversityNanjing 211171China Geoenvironmental Research Centre School of EngineeringCardiff UniversityCardiff CF243AAUK School of Energy and Environment Southeast UniversityNanjing 210096China College of Chemical Engineering Nanjing Forestry UniversityNanjing 210037China

A series of Fe–Mn catalysts was prepared using different supports(kaolin, diatomite, and alumina) and used for NO abatement via low-temperature NH3-selective catalytic reduction(SCR).The results showed that 12 Fe–10 Mn/Kaolin(with the concentration of Fe and Mn 12 and 10 wt.%, respectively) exhibited the highest activity, and more than 95.8% NO conversion could be obtained within the wide temperature range of 120–300℃.The properties of the catalysts were characterized by inductively coupled plasma-atomic emission spectrometry(ICP-AES), thermogravimetry(TG), Brunner–Emmet–Teller(BET)measurements, X-ray diffraction(XRD), H2-temperature programmed reduction(H2-TPR),NH3-temperature programmed desorption(NH3-TPD), X-ray photoelectron spectroscopy(XPS), scanning electron microprobe(SEM) and energy dispersive spectroscopy(EDS)*** support effects resulted in significant differences in the components and structures of *** 12 Fe–10 Mn/Kaolin catalyst exhibited better dispersion of active species, optimum low-temperature reduction behavior, the largest amount of normalized Br?nsted acid sites, and the highest Mn4+/Mn and Fe3+/(Fe3++ Fe2+), all of which may be major reasons for its superior catalytic activity.

关键词： Kaolin Low-temperature Iron-based catalysts NO abatement

Energy recovery and abatement potential of CO_2 emissions for an integrated iron and steel making enterprise

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Science China(Technological Sciences) 2010年第1期53卷 129-133页

作者： LI HongFu1,2,BAO WeiJun3,LI HuiQuan3 & CANG DaQiang1 1 Ecology and Recycling Metallurgy Laboratory,Ministry of Education,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 10083,China 2 Jinan iron & Steel Group Ltd.,Jinan 250101,China 3 National Engineering Laboratory for Clean Production Technology of Hydrometallurgy,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China Ecology and Recycling Metallurgy Laboratory Ministry of Education School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Jinan iron & Steel Group Ltd. National Engineering Laboratory for Clean Production Techn

The typical features for an integrated iron & steelmaking industry are high energy consumption and CO2 *** traditional BF-BOF process in an integrated Iron and steelmaking enterprise produces a large amount of residual heat and energy,which has great potential for recovery and abatement potential of CO2 *** this paper,for an integrated Iron & steelmaking enterprise of 10 million tons per year in capacity,the residual heat and energy recovery analysis was *** is indicateded that the residual heat and energy can be recovered as electric power by using present advanced process *** means of the distributed power generation,the residual heat and energy can be recovered,with a power generation capacity of 419.5 kWh per ton steel ***,the abatement potential of CO2 emissions for an integrated iron & steel making enterprise was also evaluated,which indicated that about 398.5 kg CO2 could be reduced per ton steel product.

关键词： Iron and Steelmaking enterprise residual heat and energy recovery distributed power generation abatement potential of CO2 emission

A review on application of dielectric barrier discharge plasma technology on the abatement of volatile organic compounds

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Frontiers of Environmental Science & Engineering 2019年第2期13卷 1-19页

作者： Wenjing Lu Yawar Abbas Muhammad Farooq Mustafa Chao Pan Hongtao Wang School of Environment Tsinghua UniversityBeijing 100084China Department of Environmental Design Health and Nutritional SciencesAllama Iqbal Open UniversityIslamabad 44000Pakistan

Volatile organic compounds(VOCs)released from the waste treatment facilities have become a significant issue because they are not only causing odor nuisance but may also hazard to human ***-thermal plasma(NTP)technologies are newly developed methods and became a research trend in recent years regarding the removal of VOCs from the air *** to its unique characteristics,such as rapid response at room temperature,bulk homogenized volume,high reaction efficiency,dielectric barrier discharge(DBD)plasma technology is considered one of the most promising techniques of *** paper reviews recent progress of DBD plasma technology for abatement of *** principle of plasma generation in DBD and its configurations(electrode,discharge gap,dielectric barrier material,etc.)are discussed in *** on previously published literature,attention has been paid on the effect of DBD configuration on the removal of *** of various process parameters such as initial concentration,gas feeding rate,oxygen content and input power on VOCs removal are also ***,the role of catalysis and inhibitors in VOCs removal by DBD system are ***,a modified configuration of the DBD reactor,*** dielectric barrier discharge(DDBD)for the abatement of VOCs is *** was suggested that the DDBD plasma reactor could be used for higher conversion efficiency as well as for avoiding solid residue deposition on the *** depositions can interfere with the performance of the reactor.

关键词： Non-thermal plasma (NTP) Dielectric barrier discharge (DBD) Volatile organic compounds (VOCs) abatement Input power

Construction of spinel/biochar film/honeycomb monolithic catalyst for photothermal catalytic oxidation of VOCs

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FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING 2024年第9期18卷 102-0页

作者： Lu, Xikai Zhang, Chunyan Wu, Meng Liu, Wenjie Xue, Bin Yao, Chao Li, Xiazhang Changzhou Univ Natl Local Joint Engn Res Ctr Biomass Refining & H Changzhou 213164 Peoples R China Univ Delaware Dept Mat Sci & Engn Delaware City DE 19716 USA

Photothermal catalytic oxidation emerges as a promising method for the removal of volatile organic compounds (VOCs). Herein, via sol-gel impregnation method, spinel CuMn2O4 was coated on attapulgite honeycombs with integrating biochar (BC) film as the second carrier, using chestnut shell as complexation agent. Various mass ratios of CuMn2O4 to chestnut shell was modulated to investigate the catalytic toluene degradation performance. Results indicated that the monolithic CuMn2O4/BC/honeycomb catalyst demonstrated superior photothermal catalytic toluene degradation with a low T90 (temperature at 90% degradation) of 263 degrees C when the mass ratio of CuMn2O4 to biomass was 1:4. The addition of BC film substantially increased the honeycomb's specific surface area and improved the photothermal conversion of spinel, leading to enhanced photothermal catalytic activity. This study presents a cost-effective strategy for eliminating industrial VOCs using clay-biomass based monolithic catalyst.

关键词： CuMn2O4 biochar photothermal catalysis attapulgite honeycomb volatile organic compound PERFORMANCE abatement SURFACE

CFD simulations for longwall gas drainage design optimisation

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International Journal of Mining Science and Technology 2017年第5期27卷 777-782页

作者： Qin Johnny Qu Qingdong Guo Hua Coal Mining Research Program The Commonwealth Scientific and Industrial Research Organisation(CSIRO)Brisbane 883Australia

Computational fluid dynamics(CFD) simulation is an effective approach to develop and optimise gas drainage design for underground longwall coal mining. As part of the project supported by the Australian Government Coal Mining abatement Technology Support Package(CMATSP), threedimensional CFD simulations were conducted to test and optimise a conceptual design which proposes using horizontal boreholes to replace vertical boreholes at an underground coal mine in *** performance between a vertical borehole and a horizontal borehole was first carried out to compare their capacity and effectiveness. Then a series of cases with different horizontal borehole designs were simulated to optimise borehole configuration parameters such as location, diameter, and number of boreholes. The study shows that the horizontal borehole is able to create low pressure sinks that protect the workings from goaf gas ingresses by changing goaf gas flow directions, and that it has the advantage to continuously maintain such low pressure sinks near the tailgate as the longwall advances. An example of optimising horizontal borehole locations in the longwall lateral direction is also given in this paper.

关键词： Goaf gas drainage Horizontal borehole CFD simulation Design optimisation Mining abatement technology

Influence of the structure and composition of Fe–Mn binary oxides on rGO on As(Ⅲ) removal from aquifers

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Journal of Environmental Sciences 2020年第2期32卷 133-144页

作者： Tao Sha Wenhua Hu Jun Dong Zifang Chi Yongsheng Zhao Huazheng Huang Key Lab of Groundwater Resources and Environment Ministry of EducationJilin UniversityChangchun 130021China

Fe–Mn binary oxide(FMBO) possesses high efficiency for As(Ⅲ) abatement based on the good adsorption affinity of iron oxide and the oxidizing capacity of Mn(Ⅳ), and the composition and structure of FMBO play important roles in this *** compare the removal performance and determine the optimum formula for FMBO, magnetic graphene oxide(MRGO)–FMBO and MRGO–MnO2 were synthesized with MRGO as a carrier to improve the dispersity of the adsorbents in aquifers and achieve magnetic *** indicated that MRGO–FMBO had higher As(Ⅲ) removal than that of MRGO–MnO2,although the ratios of Fe and Mn were similar, because the binary oxide of Fe and Mn facilitated electron transfer from Mn(Ⅳ) to As(Ⅲ), while the separation of Mn and Fe on MRGO–MnO2 restricted the *** optimal stoichiometry x for MRGO–FMBO(MnxFe3-xO4) was 0.46, and an extraordinary adsorption capacity of 24.38 mg/g for As(Ⅲ) was ***–FMBO showed stable dispersive properties in aquifers, and exhibited excellent practicability and reusability, with a saturation magnetization of 7.6 emu/g and high conservation of magnetic properties after 5 cycles of regeneration and *** addition, the presence of coexisting ions would not restrict the practical application of MRGO–FMBO in groundwater *** redox reactions of As(Ⅲ) and Mn(Ⅳ) on MRGO–FMBO were also *** deprotonated aqueous As(Ⅲ) on the surface of MRGO–FMBO transferred electrons to Mn(Ⅳ), and the formed As(Ⅴ) oxyanions were bound to ferric oxide as inner-sphere complexes by coordinating their "–OH" groups with Mn(Ⅳ)oxides at the surface of MRGO–*** work could provide new insights into highperformance removal of As(Ⅲ) in aquifers.

关键词： MRGO–MnO2 MRGO–FMBO Optimum formula As(Ⅲ) abatement Adsorption–oxidation-collection

In situ electron-induced reduction of NOx via CNTs activated by DBD at low temperature

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Frontiers of Environmental Science & Engineering 2020年第2期14卷 87-96页

作者： Weixuan Zhao Liping Lian Xingpeng Jin Renxi Zhang Gang Luo Huiqi Hou Shanping Chen Ruina Zhang Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Institute of Environmental ScienceFudan UniversityShanghai 200433China National Engineering Laboratory for VOCs Pollution Control Material&Technology University of Chinese Academy of SciencesBeijing 100049China Shanghai Institute for Design&Research on Environmental Engineering Shanghai 200232China

In this study,a new in situ electron-induced process is presented with carbon nanotubes(CNTs)as a reduction agent activated by dielectric barrier discharge(DBD)for nitrogen oxide(NOx)abatement at low temperature(abatement mechanism of this new ***,the outlet gas components were also observed via Fourier transform infrared spectroscopy(FTIR)to help reveal the NOr reduction *** results verified that carbon atoms excited by DBD and the structure of CNTs contributed to the synergistic activity of the DBD-CNT *** new deNOx process was accomplished through in situ heterogenetic reduction reactions between the NOx and carbon atoms activated by the plasma on the *** addition,further results indicated that the new deNOv process exhibited acceptable S02 tolerance and water resistance.

关键词： Dielectric barrier discharge NOx abatement In situ electron-induced reduction Carbon nanotubes

Co-controlling CO2 and NOx emission in China's cement industry:An optimal development pathway study

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Advances in Climate Change Research 2018年第1期9卷 34-42页

作者： FENG Xiang-Zhao Oleg LUGOVOY QIN Hu Policy Research Centre for Environment and Economy of the Ministry of Environmental Protection Beijing 100029China Environmental Defense Fund Washington DC 20009USA Environmental Defense Fund Beijing 100007China

It is of important practical significance to reduce NOx emission and CO2 emission in China's cement *** paper firstly identifies key factors that influence China's future cement demand,and then uses the Gompertz model to project China's future cement demand and ***,the multi-pollutant abatement planning model(MAP)was developed based on the TIMES model to analyze the co-benefits of CO2 and NOx control in China's cement *** modeling analysis,three scenarios such as basic as usual scenario(BAU),moderately low carbon scenario(MLC),and radically low carbon scenario(RLC),were built according to different policy constraints and emission control ***,the benefits of co-controlling NOx and CO2 emission in China's cement industry have been ***,this paper proposes a cost-efficient,green,and low carbon development roadmap for the Chinese cement sector,and puts forwards countermeasures as follows:first,different ministries should enhance communication and coordination about how to promote the co-control of NOx and CO2 in cement ***,co-control technology list should be issued timely for cement industry,and the R&D investment on new technologies and demonstration projects should be ***,the phase-out of old cement capacity needs to be continued at policy ***,it is important to scientifically evaluate the relevant environmental impact and adverse motivation of ammonia production by NOx removal requirement in cement industry.

关键词： Cement industry CO2 abatement NOx reduction Co-benefit analysis

Effect analysis of carbon trading on Economy-Energy-Environment system and calculation of reasonable carbon price intervals

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Chinese Journal of Population,Resources and Environment 2015年第2期13卷 146-154页

作者： Rui Sun Dan Kuang Dongqin Chang Research Institute of Energy Technology and Economics Chongqing University

This paper constructs a 4-lier computable general equilibrium model which includes such modules as modeling carbon emission constraints and carbon trading(CT),and incorporates the cost of carbon emissions into constant elasticity of substitute production *** scenario settings under different carbon abatement targets,based on 2007 national social accounting matrix and related statistical data about energy consumption and carbon emission,effects on economic outputs,energy consumption,and carbon abatement are estimated and analyzed at both macro and sector *** calculating selected novel indicators that compromise between macroeconomic opportunity cost and achievable carbon abatement,reasonable carbon price intervals are given for enhancing the robustness and liquidity of carbon ***,by decomposition and share-weighted methods,expected carbon abatement and energy price are measured and analyzed in *** results are meaningful for fundamental design of the future carbon *** constant energy utilization and carbon abatement technologies at the macro level,the higher the carbon price the more actual carbon abatement;the more gross domestic product loss,the less energy *** to the overall situation estimated for 2007 in China,the advice given is to introduce a carbon abatement target rate(R_c)of-10%,which is helpful to make carbon market stable against unexpected carbon price shocks between[6.9,35]/tC with less economic *** to Kaya decomposition,after introduction of carbon pricing,carbon abatement is mainly contributed by the effects of energy intensity(EI)and technical ***,CT may help reduce energy consumption and induce transformation to a low-carbon energy *** the sector level,the introduction of CT could induce economic recession in all sectors,especially ***,the overall economic structure remains unchanged to some *** will help reduce energy consumption in all s

关键词： Computable general equilibrium model carbon trading energy consumption carbon abatement scenario analysis