典型现代煤化工过程的二氧化碳排放比较

发布时间：2018-07-29 16:40

【摘要】：基于低碳经济发展的要求,对几种典型煤化工过程中的CO_2排放情况进行了分析,提出科学比较现代煤化工过程的CO_2排放量。对于煤制烯烃、煤制乙二醇等煤基化学品而言,使用单位热值CO_2排放量作为评价指标并不合适。基于煤基燃料产品和化学品的不同特点,结合我国碳排放强度的控制目标,本文探索采用单位产值CO_2排放量和单位工业增加值CO_2排放量作为补充指标,用以比较研究不同现代煤化工过程的低碳水平和碳排放强度。研究结果表明,用不同的指标来衡量比较现代煤化工过程的CO_2排放量,得到的结果不同。煤制甲醇、煤制二甲醚的吨产品CO_2排放量虽然较低,分别为3.85t和5.0t,但单位热值CO_2排放量较高,分别为0.159t/GJ和0.160t/GJ。在80美元/bbl和40美元/bbl的原油价格体系下,煤制天然气和煤制甲醇的单位产值和单位工业增加值CO_2排放量均高于其他现代煤化工产品。
[Abstract]:Based on the requirements of low-carbon economy development, the CO_2 emission in several typical coal chemical processes is analyzed, and a scientific comparison of CO_2 emissions from modern coal chemical processes is put forward. For coal based chemicals such as olefin from coal and ethylene glycol from coal, it is not appropriate to use CO_2 emissions per unit heat value as an evaluation index. Based on the different characteristics of coal-based fuel products and chemicals, combined with the control target of carbon emission intensity in China, this paper explores the use of CO_2 emissions per unit output value and CO_2 emissions per unit industrial added value as supplementary indicators. To compare the low carbon level and carbon emission intensity of different modern coal chemical processes. The results show that different indexes are used to measure and compare the CO_2 emissions from modern coal chemical process, and the results are different. Although the CO_2 emissions from coal to methanol and from coal to dimethyl ether are lower, they are 3.85 t and 5.0 t, respectively, but the CO_2 emissions per unit calorific value are higher, which are 0.159t/GJ and 0.160 t / GJ, respectively. Under the crude oil price system of $80 / bbl and $40 / bbl, the unit output and CO_2 emissions per unit of industrial added value of coal to natural gas and coal to methanol are higher than those of other modern coal chemicals.
【作者单位】：中国矿业大学(北京)化学与环境工程学院;北京低碳清洁能源研究所;
【基金】：中国工程院重大咨询项目“碳约束条件下我国能源结构优化研究”(2016-ZD-07)
【分类号】：X784;TQ53

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