天然气与煤联合气化的热力学模拟研究  

Thermodynamic simulation and analysis of synthesis gas preparation from natural gas & coal co-gasification

作　　者：宋学平[1] 郭占成[1] 

机构地区：[1]中国科学院过程工程研究所,北京100080

出　　处：《计算机与应用化学》2005年第1期38-42,共5页Computers and Applied Chemistry

基　　金：国家‘863’计划资助项目(2002AA529090);国家杰出青年科学基金(50225415)

摘　　要：天然气与煤联合气化工艺通过改变进料条件,能够直接得到H_2/CO比可调合成气。为探索进料条件对合成气H_2/CO比和温度的影响规律,本文建立了描述天然气与煤联合气化制合成气热力学模型,根据该模型计算了不同进料条件对合成气H_2/CO和出口温度的影响。计算结果表明,进料中CH_4/O_2比例的增加可同时显著提高合成气的H_2/CO比和降低反应温度;进料中H_2O/O_2比例的增加只是显著降低反应温度,而对合成气H_2/CO比的影响较小;提高进料温度和操作压力对合成气生产有利。Co-gasifying coal and natural gas is a new process based on steam methane reforming and coal gasification. Synthesis gas of H2/CO ratio in a range of 1.0-2.0 can be obtained directly by adjusting the ratios of natural gas, oxygen and steam, A thermodynamic model of natural gas & coal co-gasification was established to investigate the relations between feedstock and H_2/CO ratio of synthesis gas. H_2/CO ratios and temperatures of synthesis gas under different operating conditions were calculated. Results showed that variation of natural gas in feedstock could largely influence H_2/CO ratio and temperature of synthesis gas simultaneously. Increase of steam in feedstock has little effect on H_2/CO of synthesis gas but can be used to control the reaction temperature. Preheating of feed and high operation pressure are both advantageous to synthesis gas preparation from natural gas & coal co-gasification.

关 键 词：煤 天然气 合成气 热力学 

分 类 号：TQ021.2[化学工程]