煤制合成氨碳足迹核算与减排分析  

Carbon footprint accounting and emission reduction analysis of coal-based synthetic ammonia

作　　者：李淳 孙志辉 黄湘琦 乔宁[1] LI Chun;SUN Zhihui;HUANG Xiangqi;QIAO Ning(College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China;China Quality Mark Certification Group,Beijing 100089,China)

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]方圆标志认证集团有限公司,北京100089

出　　处：《化工环保》2024年第4期559-564,共6页Environmental Protection of Chemical Industry

摘　　要：采用生命周期评价方法,以1 t液态合成氨为功能单位,构建了“从摇篮到大门”的煤制合成氨碳足迹核算模型,以调研得到的国内煤制合成氨企业生产数据为基础进行了碳足迹核算和减排措施分析。结果表明:煤制1 t液态合成氨产品的碳足迹为6204.11 kg CO_(2)e,其中氨合成阶段由于化学反应造成的CO_(2)直接排放占生命周期碳足迹的47.12%,应作为减排的关注重点;从提升能源效率、采用负碳技术两方面考虑,分别采用煤化学链制氢技术和碳捕集技术降低碳排放,与传统工艺相比,采用煤化学链制氢技术可使碳足迹降低27.99%,采用碳捕集技术可使碳足迹降低46.36%,后者的碳减排潜力更大,应着重发展。By means of the life cycle assessment,a“cradle-to-gate”accounting model of coal-based synthetic ammonia carbon footprint was constructed with 1 t liquid ammonia as the functional unit,to account carbon footprint and analyze emission reduction measures based on the production data of domestic coal-based synthetic ammonia enterprises.The results show that the carbon footprint of 1 t liquid ammonia product made from coal is 6204.11 kg CO_(2)e,with direct CO_(2)emission caused by chemical reaction in the ammonia synthesis stage accounting for 47.12%of that in the life cycle,which should be the focus of emission reduction;Considering improving energy efficiency and utilizing negative carbon technologies,the coal-fueled chemical looping technology for hydrogen production and carbon capture technology are adopted respectively to reduce carbon emissions.Compared with traditional processes,the carbon footprint can be reduced by 27.99%by using coal-fueled chemical looping technology for hydrogen technology,and by 46.36%by using carbon capture technology.The latter has greater potential for carbon emission reduction and should be developed emphatically.

关 键 词：合成氨 生命周期评价 碳足迹 碳减排 

分 类 号：X511[环境科学与工程—环境工程]