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life cycle assessment of oxygen-18 production using cryogenic oxygen distillation

Chinese Journal of Chemical Engineering 2018年第9期26卷 1960-1966页

作者： Meysam Akbarian Shourkaei Abbas Rashidi Javad Karimi-Sabet Faculty of Engineering University of Mazandaran Material and Nuclear Fuel Research School (MNFRS) Nuclear Science and Technology Research Institute

In this study, life cycle assessment of oxygen-18 by using cryogenic distillation of oxygen is performed using SimaPro 8.3 software. life cycle assessment is performed to understand the environmental profile and hotspots of this process in order to be used in design and development. Simulation of oxygen-18 process is executed by Hysys software, and the required inputs and outputs for inventory of life cycle were acquired. By doing life cycle assessment and considering achieved results after characterization and normalization of inventory data it has been investigated that in the majority of environmental impacts electricity consumption has a huge contribution relative to other parts of the system like liquefied oxygen production from air separation unit,required facilities for air separation and oxygen-18 units, and needed transportation. Also, among 17 impact categories investigated in ReCiPe impact assessment method, fossil depletion, climate change(human health),particulate matter formation, climate change(ecosystem), human toxicity, and metal depletion have the most contribution in entire environmental loads respectively. Furthermore, sensitivity analysis showed that changing life cycle impact assessment method from ReCiPe to IMPACT 2002+ has no significant effect on acquired results and results are confident. In addition, assumption of market for depleted oxygen from heavy isotopes which is withdrawn from top of distillation columns showed some positive effects compared to first case and environmental impacts resulted from liquefied oxygen production(feed) reduced but because of huge contribution of electricity consumption compared to other sections, this positive effect has no remarkable influence on entire environmental loads of product system.

关键词： life cycle assessment Oxygen- 18 production Cryogenic distillation Isotope separation

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life cycle assessment and economic analysis of HFC-134a production from natural gas compared with oil-based and coal-based production

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Frontiers of Chemical Science and Engineering 2022年第12期16卷 1713-1725页

作者： Suisui Zhang Gang Li Boyang Bai Luyao Qiang Xiaoxun Ma Jingying Li School of Chemical Engineering Northwest UniversityXi’an 710069China Chemical Engineering Research Center of the Ministry of Education(MOE)for Advanced Use Technology of Shanbei Energy Xi’an 710069China Shaanxi Research Center of Engineering Technology for Clean Coal Conversion Xi’an 710069China Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi Xi’an 710069China International Scientific and Technological Cooperation Base of the Ministry of Science and Technology(MOST)for Clean Utilization of Hydrocarbon Resources Xi’an 710069China Longdong University Qingyang 745000China

China is the largest producer and consumer of HFC-134a(1,1,1,2-tetrafluoroethane)in the ***-based route is mainly adopted to produce HFC-134a,which suffers from large waste and CO_(2) *** gas is a low-carbon and clean energy resource,and no research has been found on the environment and economy of producing HFC-134a from natural *** this study,CML 2001 method was used to carry out the life cycle assessment of natural gas(partial oxidation)-based and natural gas(plasma cracking)-based routes(abbreviated as gas(O)-based and gas(P)-based routes,respectively),and their environmental performances were compared with coal-based and oil-based ***,considering that China is vigorously promoting the transformation of energy structure,and the application of electric heating equipment to replace fossil-based heating equipment in industrial field,which has a great impact on the environmental performance of the production processes,the authors conducted a scenario *** results showed that the gas(O)-based route had the most favourable environmental ***,the gas(P)-based route had the highest potential for reducing environmental burdens,and its environmental benefit was the most favourable in scenario ***,the economic performance of the gas(P)-based route was significantly better than that of gas(O)-based and coal-based routes.

关键词： life cycle assessment economic performance HFC-134a natural gas oil coal

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life cycle assessment of HFC-134a production by calcium carbide acetylene route in China

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Chinese Journal of Chemical Engineering 2022年第2期35卷 236-244页

作者： Suisui Zhang Jingying Li Yan Nie Luyao Qiang Boyang Bai Zhiwei Peng Xiaoxun Ma School of Chemical Engineering Northwest UniversityXi’an 710069China Chemical Engineering Research Center of the Ministry of Education(MOE)for Advanced Use Technology of Shanbei Energy Xi’an 710069China Shaanxi Research Center of Engineering Technology for Clean Coal Conversion Xi’an 710069China Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi Xi’an 710069China International Scientific and Technological Cooperation Base of the Ministry of Science and Technology(MOST)for Clean Utilization of Hydrocarbon Resources Xi’an 710069China

HFC-134a is a widely used environment-friendly *** present,China is the largest producer of HFC-134a in the *** production of HFC-134a in China mainly adopts the calcium carbide acetylene ***,the production route has high resource and energy consumption and large waste emission,and few of the studies addressed on the environmental performance of its production *** study quantified the environmental performance of HFC-134a production by calcium carbide route via carrying out a life cycle assessment(LCA)using the CML 2001 *** uncertainty analysis by Monte-Carlo simulation was also carried *** results showed that electricity had the most impact on the environment,followed by steam,hydrogen fluoride and chlorine,and the impact of direct CO_(2) emissions in calcium carbide production stage on the global warming effect also could not be ***,the clean energy(e.g.,wind,solar,biomass,and natural gas)was used to replace coal-based electricity and coal-fired steam in this study,showing considerable environmental *** the same time,the use of advanced production technologies could also improve environmental benefits,and the environmental impact of the global warming category could be reduced by 4.1%via using CO_(2) capture and purification *** Chinese database of HFC-134a production established in this study provides convenience for the relevant study of *** the production of HFC-134a,this study helps to better identify the specific environmental hotspots and proposes useful ways to improve the environmental benefits.

关键词： HFC-134a Calcium carbide life cycle assessment Environmental impact Carbon capture

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life cycle assessment of homogeneous Fenton process as pretreatment for refractory pharmaceutical wastewater

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Frontiers of Chemical Science and Engineering 2024年第5期18卷 1-11页

作者： Maojun Zou Jie Wei Yuanyuan Qian Yanjing Xu Zhihuang Fang Xuejing Yang Zhiyuan Wang School of Energy and Power Engineering University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Engineering Laboratory of Lean Operational Technologies for Full Water System East China University of Science and TechnologyShanghai 200237China Mcwong Environmental Technology Company Limited Shanghai 200135China National Engineering Laboratory of High Concentration and Refractory Organic Wastewater Treatment Technology East China University of Science and TechnologyShanghai 200237China

The applicability of the life cycle assessment(LCA)to the Fenton process should be considered not only at the laboratory-scale but also at the *** this study,the LCA process was applied to evaluate the homo-geneous Fenton process for the treatment of high salinity pharmaceutical *** potential environmental impacts were calculated using Simapro software implemen-ting the CML 2001 methodology with normalization factors of 1995 *** data obtained directly from the full-scale wastewater treatment plant and labora-tory were used to conduct a life cycle inventory analysis,ensuring highly accurate *** normalized results,the Fenton process reveals sensitive indicators,primarily toxi-city indicators(human toxicity,freshwater aquatic toxicity,and marine aquatic toxicity),as well as acidification and eutrophication impacts,contributed by hydrogen peroxide and iron sludge incineration,***,hydrogen peroxide and iron sludge incineration contribute significantly,accounting for at least 78%of these *** sludge treatment phase,treatment of iron mud and infrastructure of hazardous waste incineration plants were the key contributors of environmental impacts,adding up to more than 95%.This study suggests the need to develop efficient oxidation processes and effective iron sludge treatment methods to reduce resource utilization and improve environmental benefits.

关键词： advanced oxidation processes full-scale life cycle assessment Fenton process pharmaceutical high-salinity wastewater

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life cycle assessment Analysis and Comparison of 1000 MW S-CO_(2)Coal Fired Power Plant and 1000 MW USC Water-Steam Coal-Fired Power Plant

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Journal of Thermal Science 2022年第2期31卷 463-484页

作者： LI Mingjia WANG Ge XU Jinliang NI Jingwei SUN Enhui Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy&Power EngineeringXi’an Jiaotong UniversityXi’an 710049China Beijing Key Laboratory of Multiphase Flow and Heat Transfer for Low Grade Energy Utilization North China Electric Power UniversityBeijing 102206China

The objective of this paper is to understand the benefits that one can achieve for large-scale supercritical CO_(2)(S-CO_(2))coal-fired power *** aspects of energy environment and economy of 1000 MW S-CO_(2)coal-fired power generation system and 1000 MW ultra-supercritical(USC)water-steam Rankine cycle coal-fired power generation system are analyzed and compared at the similar main vapor parameters,by adopting the neural network genetic algorithm and life cycle assessment(LCA)***-objective optimization of the 1000 MW S-CO_(2)coal-fired power generation system is further carried *** power generation efficiency,environmental impact load,and investment recovery period are adopted as the objective *** main vapor parameters of temperature and pressure are set as the decision *** results are concluded as ***,the total energy consumption of the S-CO_(2)coal-fired power generation system is 10.48 MJ/k Wh and the energy payback ratio is 34.37%.The performance is superior to the USC coal-fired power generation ***,the resource depletion index of the S-CO_(2)coal-fired power generation system is 4.38μPRchina,90,which is lower than that of the USC coal-fired power generation system,and the resource consumption is ***,the environmental impact load of the S-CO_(2)coal-fired power generation system is 0.742 m PEchina,90,which is less than that of the USC coal-fired power generation system,0.783 m PEchina,*** all environmental impact types,human toxicity potential HTP and global warming potential GWP account for the most environmental ***,the investment cost of the S-CO_(2)coal-fired power generation system is generally less than that of the USC coal-fired power generation system because the cost of the S-CO_(2)turbine is only half of the cost of the steam *** optimal turbine inlet temperature T_(5)becomes smaller,and the optimal turbine inlet pressure is unchanged at 622.082°C/30 MPa.

关键词： S-CO_(2)power plant ultra-supercritical water-steam Rankine cycle power plant life cycle assessment energy efficiency environment impact economic performance

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life cycle assessment Introduced by Using Nanorefrigerant of Organic Rankine cycle System for Waste Heat Recovery

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Journal of Renewable Materials 2023年第3期11卷 1153-1179页

作者： Yuchen Yang Lin Ma Jie Yu Zewen Zhao Pengfei You Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming650093China State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province Kunming University of Science and TechnologyKunming650093China

The use of nanorefrigerants in Organic Rankine cycle(ORC)units is believed to affect the cycle environment performance,but backed with very few relevant *** this purpose,a life cycle assessment(LCA)has been performed for the ORC system using nanorefrigerant,the material and energy input,characteristic indicators and comprehensive index of environmental impact,total energy consumption and energy payback time(BPBT)of the whole life cycle of ORC system using Al_(2)O_(3)/R141b nanorefrigerant were *** environmental comprehensive indexes reveal that ECER-135 index decrease by 1.5%after adding 0.2%Al_(2)O_(3)nanoparticles to *** on the contribution analysis and sensitivity analysis,it can be found out ORC system manufacturing is of the most critical stage,where,the ECER-135 index of ORC component production is the greatest,followed by the preparation process of R141b,transportation phase,and that of Al_(2)O_(3)nanoparticles preparation is *** retirement phase which has good environmental benefits affects the result significantly by recycling important ***,the main cause and relevant suggestion for improvement were traced ***,the environmental impacts of various power generations were compared,and results show that the power route is of obvious *** the renewable energy,ORC system using Al_(2)O_(3)/R141b nanorefrigerant with minimal environmental impact is only 0.67%of coal-fired power *** environmental impact of current work is about 14.34%of other nations’PV results.

关键词： life cycle assessment Organic Rankine cycle nanorefrigerant total energy consumption energy payback time

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life cycle assessment of Internal Recycling Options of Steel Slag in Chinese Iron and Steel Industry

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Journal of Iron and Steel Research International 2011年第7期18卷 33-40页

作者： CHEN Bo YANG Jian-xin OUYANG Zhi-yun State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of Sciences Beijing 100085 China

The internal recycling process of BOF slag which is one of the huge solid wastes from iron and steel indus try was emphasized. Based on the four scenarios of different internal recycling strategies for BOF slag, life cycle assessment （LCA） as a valuable tool for industrial solid waste management was applied to analyze the contribution to reducing environmental impacts and resources burdens for each scenario. The global warming potential （GWP） re- sults of the four scenarios show that the scenario which performs best in carbon reduction cuts off 14.2G of GWP impacts of the worst scenario. The results of this study show that the optimized internal recycling process of BOF slag can improve the environmental performance of crude steel. It is important to assess and choose an appropriate strategy to recycle BOF slag from LCA perspective to reduce the environmental impacts and resource burdens as much as possible.

关键词： life cycle assessment sustainable development close-loop recycling steel BOF slag

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life cycle assessment of Iron Ore Sintering Process

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Journal of Iron and Steel Research International 2015年第6期22卷 473-477页

作者： Zong-ping LI Xiao-hui FAN Gui-ming YANG Jin-chao WEI Ying SUN Min WANG School of Minerals Processing and Bioengineering Central South University Zhongye Changtian International Engineering Co. Ltd.

Iron ore sintering is an energy＇intensive process associated with emission of pollutants in iron and steel in- dustry. In order to comprehensively evaluate the environmental impacts of sintering, a detailed life cycle assessment of a sintering plant was conducted. life cycle inventory showed that, in the production of 1 t sinter ore, 241.53 kg CO2 , 22.68 kg CO, 0. 294 kg SO2 , 0.63 kg NO, , 1.18 /lg dioxin and 0.48 kg dust were discharged. Global war- ming potentials, acidification potentials, photochemical ozone creation potentials and human toxicity potentials were selected as four impact categories, and the evaluation index for the sintering plant was calculated as 3.45 × 10 ^-12. Fi nally, based on the environmental impact analysis, several measures of reducing environmental [oadings of the sinte- ring plant were provided, which included the utilization of denitrification equipment, recirculation of the hot waste gas and process improvement to reduce fuel consumption.

关键词： iron ore sintering plant life cycle assessment pollutant emission environmental loading

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life cycle assessment on the environmental impacts of different pig manure management techniques

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International Journal of Agricultural and Biological Engineering 2022年第3期15卷 78-84页

作者： Baocheng Dong Chengjun Song Huibin Li Aijun Lin Jiuchen Wang Wei Li School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China Comprehensive Laboratory for Resource Recycling Technology and Model of the Ministry of Agriculture and Rural Affairs Rural Energy and Environment AgencyBeijing 100125China School of Chemical Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China

The management of livestock waste is an effective way to achieve emission reduction and carbon fixation in agriculture and rural *** present,aerobic composting and anaerobic fermentation are widely used in livestock waste treatment *** this study,pig manure management was taken as an example,a comprehensive environmental load index was constructed to quantitatively evaluate the environmental impacts of global warming,environmental acidification,eutrophication,and photochemical ozone synthesis during aerobic composting and anaerobic fermentation based on the life cycle *** results showed that the potential values of aerobic composting and anaerobic fermentation were similar,and the order was global warming,environmental acidification,eutrophication,and photochemical ozone *** fermentation contributed more to global warming,while aerobic composting contributed more to environmental acidification,eutrophication,and photochemical ozone *** addition,the environmental load index of aerobic composting was significantly higher than that of anaerobic *** were certainly regional differences in the environmental load index,and the environmental impact effect of anaerobic fermentation was low and more environmentally *** findings provided a technical basis for livestock manure management in different regions of China,which was conducive to promoting animal husbandry emission reduction and carbon sequestration.

关键词： manure management life cycle assessment low carbon treatment aerobic composting anaerobic fermentation environmental impact assessment emission reduction and carbon sequestration

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life cycle assessment of urban uses of biochar and case study in Uppsala,Sweden

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Biochar 2022年第1期4卷 889-905页

作者： Elias S.Azzi Erik Karltun Cecilia Sundberg Department of Sustainable Development Environmental Engineeringand Sciences(SEED)KTH Royal Institute of TechnologyTeknikrigen 10B11428 StockholmSweden Department of Soil and Environment Swedish University of Agricultural Sciences(SLU)UppsalaSweden Department of Energy and Technology Swedish University of Agricultural Sciences(SLU)UppsalaSweden

Biochar is a material derived from biomass pyrolysis that is used in urban *** environmental impacts of new biochar products have however not been ***,the life cycle assessments of 5 biochar products(tree planting,green roofs,landscaping soil,charcrete,and biofilm carrier)were performed for 7 biochar supply-chains in 2 energy *** biochar products were benchmarked against reference products and oxidative use of biochar for steel *** demand was then estimated,using dynamic material flow analysis,for a new city district in Uppsala,*** a decarbonised energy system and with high biochar stability,all biochar products showed better climate performance than the reference products,and most applications outperformed biomass use for decarbonising steel *** climate benefits of using biochar ranged from−1.4 to−0.11 tonne CO_(2)-eq tonne−1 biochar in a decarbonised energy *** other environmental impact categories,biochar products had either higher or lower impacts than the reference products,depending on biochar supply chain and material substituted,with trade-offs between sectors and impact ***,several use-phase effects of biochar were not included in the assessment due to knowledge *** Uppsala’s new district,estimated biochar demand was around 1700 m^(3)year^(−1)during the 25 years of *** 2100,23%of this biochar accumulated in landfill,raising questions about end-of-life management of biochar-containing ***,in a post-fossil economy,biochar can be a carbon dioxide removal technology with benefits,but biochar applications must be designed to maximise co-benefits.

关键词： Biochar Carbon dioxide removal Urban areas Bioeconomy life cycle assessment Material flow analysis

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