摘要
根据中国煤制烯烃产业现状,采用生命周期分析(life cycle assessment,LCA)方法,以生产1 t煤制聚丙烯为功能单位,对航天粉煤加压气化-DAVY甲醇合成-DMTO工艺(HDDMTO)与GSP(gas Schwarze Pumpe)气化-低压甲醇合成-Lurgi MTP工艺(GLLMTP)两条工艺路线合成的聚丙烯产品进行分析评价。结果表明:HDDMTO工艺与GLLMTP工艺的能耗强度分别为4.23 tce/t和4.22 tce/t,碳排放强度分别为7.95 tCO_(2)/t和7.40 tCO_(2)/t,水耗强度分别为13.74 t/t和17.56 t/t。化石资源稀缺性(FFP)主要来源于煤炭开采与洗选阶段,陆地酸化(AP)、颗粒物质生成(PMFP)、海洋富营养化(MEP)、臭氧消耗(ODP)、光化学烟雾对生态损害(EOFP)、光化学烟雾对人体损害(HOFP)主要来源于能源供应阶段(电力供应与公用工程阶段)以及煤炭开采与洗选阶段,温室效应(GWP)来源于能源供应阶段、低温甲醇洗阶段以及气化阶段。环境影响潜值由大到小依次为:FFP,GWP,EOFP,HOFP,AP,PMFP,MEP,ODP。未来可考虑更换成甲醇转化率更高的新型工艺装置,或发展循环经济,收集废弃烯烃重新加工利用循环来降低FFP环境影响;在降低GWP方面,可考虑在低温甲醇洗过程部署碳捕集、转化或者封存工艺以降低碳排放。
According to the current status of coal-to-olefin industry in China,the environ-mental impacts of coal-to-polypropylene production from two different routes,(a)pulverized coal pressurized gasification to Davy methanol synthesis to DMTO-based polypropylene(HDDMTO)process,and(b)GSP gasification to low-pressure methanol synthesis to Lurgi MTP-based poly-propylene(GLLMTP)process,were analyzed and compared using life cycle assessment(LCA),based on a functional unit of producing 1 t polypropylene.The results show that the energy con-sumption of HDDMTO process and GLLMTP process is 4.23 tce/t and 4.22 tce/t,respectively;the carbon emission is 7.95 tCO_(2)/t and 7.40 tCO_(2)/t,respectively,and the water consumption is 13.74 t/t and 17.56 t/t,respectively.Moreover,the fossil resource scarcity(FFP)mainly comes from mining and mineral processing stage.Global warming potential(GWP)is from the energy supply stage,low-temperature methanol washing stage and gasification stage.While other impacts,such as acidification potential(AP),fine particulate matter formation depletion(PMFP),marine eutrophication(MEP),stratospheric ozone depletion(ODP),ecosystem damage ozone formation(EOFP)and human damage ozone formation(HOFP),mainly come from energy supply stage(power supply and utilities),as well as coal mining and mineral processing stage.Furthermore,the largest environmental impact is FFP,followed by GWP,EOFP,HOFP,AP,PMFP,MEP,and the lowest is ODP.In the future,in order to reduce the FFP environmental impact,a new processing device with higher methanol conversion rate can be replied,or a circular economy can be developed to collect waste olefin for reprocessing and recycle.In terms of reduc-ing GWP,carbon capture,conversion or storage processes can be deployed in the rectisol process to reduce carbon emissions.
作者
李泉鑫
李俊杰
龚先政
田亚峻
LI Quanxin;LI Junjie;GONG Xianzheng;TIAN Yajun(College of Faculty of Materials and Manufacturing,Beijing University of Technology,100124 Beijing,China;National Engineering Laboratory for Industrial Big Data Application Technology,100124 Beijing,China;Extended Energy Big Data and Strategy Research Center,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,266101 Qingdao,China;Shandong Energy Institute,266101 Qingdao,China)
出处
《煤炭转化》
CAS
CSCD
北大核心
2022年第4期1-9,共9页
Coal Conversion
关键词
煤化工
煤制聚丙烯
碳排放
生命周期
环境影响
coal chemical industry
coal to polypropylene
carbon emission
life cycle
environmental impact
