CH_4-CO_2两步制合成气过程的热力学分析

Thermodynamic analysis of syngas production through pyrolysis of CH 4 and coke gasification by CO 2/O 2

以热力学为基础讨论了甲烷裂解制氢、ＣＯ２和／或Ｏ２气消碳制ＣＯ，并集成为两步制合成气过程的可行性及其优缺点；讨论了此过程的操作条件。计算表明，６００℃是适宜的操作温度；此温度下采用组成为含氧１２．４％（ｍｏｌ）ＣＯ２－Ｏ２的混合气作为脱碳气体，可消去积碳和消碳两步达到热量的供给平衡。

A two step process for syngas production, which is a combination of catalytic methane pyrolysis to produce hydrogen and coke gasification by carbon dioxide/oxygen mixture to produce carbon monoxide, is discussed based on the thermodynamic calculations. It has been shown that a mixture of CO 2 and O 2 can gasify the coke formed from pyrolysis and thus the autothermal balance of the process can be reached. The optimum conditions for pyrolysis and gasification is also discussed.