新型甲醇重整–化学链氢电联产系统热力学分析

Thermodynamic Analysis of a New Methanol Reforming–Chemical Looping Cogeneration System of Hydrogen and Power

本文提出了一种新颖的甲醇重整–化学链发电制氢联产系统。该系统利用化学链燃烧氧化反应的显热给甲醇重整制氢部分提供反应热,充分利用了甲醇重整制氢的驰放气,同时实现了Fe2O3高温热的合理利用,使新系统内部能量品位的匹配变得更加合理。重整反应部分温度为250℃左右时,该新型联产系统的效率达到了61.8%,展现出了良好的热力学性能。本文对该系统进行了分析,并以常规制氢和化学链燃烧耦合发电系统为参照进行了对比,研究了其性能。新系统的效率较高,同时实现了CO2的无能耗分离。

In this paper,a new methanol reforming-Chemical Looping cogeneration system of hydrogen and power is proposed.The sensible heat of oxidation reaction in Chemical Looping Combustion is used to provide heat for methanol reforming,while the purge gas in the methanol reforming process and the heat of high temperature Fe_(2)O_(3) are comprehensively utilized,which make the matching of energy grade in the new system more reasonable.This system shows great thermodynamic properties as the thermal efficiency of it is expected to be 61.8%when the temperature of the methanol reforming process is about 250℃.The performance of the new system is analysed compared to the conventional system of hydrogen and power with Chemical Looping Combustion.The thermal efficiency of the new system is much higher than the reference system,while the CO2can be captured without energy consumption.