吸附强化式煤化学链气化系统热力学评估  

Thermodynamic evaluation of sorption-enhanced chemical looping gasification of coal

作　　者：张晓光[1] Zhang Xiaoguang(China Special Equipment Inspection and Research Institute,Beijing 100013,China)

机构地区：[1]中国特种设备检测研究院,北京100013

出　　处：《工业催化》2021年第5期65-69,共5页Industrial Catalysis

摘　　要：化学链系统因其二氧化碳内分离、低能耗优势,已经逐渐应用于煤气化工艺中。基于吉布斯最小自由能原理,对吸附强化的煤化学链气化制氢系统进行热力学评估,分析操作温度、吸附剂和载氧体循环流量对氢气产量和系统热量需求的影响。结果表明,过高的燃料反应器温度会使吸附过程失效且增加了系统的热量需求;吸附剂循环量的提高能显著提高氢气纯度,且可以减少系统总热量需求;过高的氧载体循环量虽能减低系统热量需求,但会降低氢气产量。Chemical looping system has been applied in coal gasification process because of internal separation of carbon dioxide and low energy consumpution.Based on the minimum Gibbs free energy criterion,a thermodynamic evaluation of sorption-enhanced chemical looping gasification for hydrogen production with coal is conducted.The dependence of hydrogen yield and heat consumption on operating parameters including operating temperature,circulation flow rate of oxygen carriers and sorbents is analyzed.The results reveal that an excessive reactor temperature limits the sorption reaction and increases the heat consumption.Improving the sorbent amount can improve the hydrogen purity and reduce the energy consumption.The energy requirement can be reduced under a high oxygen carrier circulation rate at the cost of hydrogen yield.

关 键 词：化工热力学 吸附 煤 化学链气化 制氢 

分 类 号：TQ013.1[化学工程] TQ54