论文部分内容阅读
基于全生命周期法(LCA)对CO_2-DMC(碳酸二甲酯)产业链碳足迹进行了分析,分别以常规反应塔工艺、膜反应塔工艺和反应精馏塔工艺为对象,考察了各工艺在不同能源供应情景下产业链的碳足迹情况,对原料的获取、原料的运输、燃料的使用、燃料的运输以及产品的配送等环节进行了碳足迹分析。结果表明:3种工艺中反应精馏塔工艺能耗、碳足迹最小,常规反应塔工艺最大;以渣油为燃料常规反应塔工艺单位产品碳足迹最大,碳足迹为1.67 t CO_2/t DMC,以天然气为燃料的反应精馏塔工艺碳足迹最小,单位产品碳足迹为0.70 t CO_2/t DMC;燃料消耗碳足迹在总碳足迹中占比最大,其次为原料上游排放。
The carbon footprint of CO 2-DMC (dimethyl carbonate) industry chain was analyzed based on LCA, and the effects of various processes including reaction tower, membrane reactor and reactive distillation tower were studied respectively. Under different energy supply scenarios, the carbon footprint of the industry chain, carbon footprint analysis of raw material acquisition, raw material transportation, fuel use, fuel transportation and product distribution and other aspects of the carbon footprint analysis. The results show that the energy consumption and the carbon footprint of the reactive distillation column are the smallest among the three kinds of processes, and the largest is the conventional reaction column. The carbon footprint of the unit product with the residue as the fuel conventional reaction column is the largest with a carbon footprint of 1.67 t CO 2 / t DMC, The natural gas-fueled reactive distillation column has the smallest carbon footprint and the carbon footprint per unit of product is 0.70 t CO 2 / t DMC; the carbon footprint of fuel consumption accounts for the largest portion of the total carbon footprint, followed by the upstream of the feedstock.