Thermodynamic equilibrium analysis of hydrogen production by coal based on Coal/CaO/H2O gasification system

被引：71

作者：

Wang, ZH ^{[1
]}

Zhou, JH ^{[1
]}

Wang, QH ^{[1
]}

Fan, JR ^{[1
]}

Cen, KF ^{[1
]}

机构：

[1] Zhejiang Univ, Clean Energy & Environm Engn Key Lab MOE, Hangzhou 310027, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2006年 / 31卷 / 07期

基金：

中国国家自然科学基金;

关键词：

hydrogen; coal; CaO; thermodynamic; equilibrium;

D O I：

10.1016/j.ijhydene.2005.07.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thermodynamic analysis of Coal/H2O/CaO gasification system was investigated for hydrogen production. The influences of gasifier operation temperature, pressure and coal type, H2O/C on hydrogen production were studied based on chemical equilibrium calculation. The operation pressure in the gasifier should be 20-30bar from CO2 partial pressure and capture efficiency studies. The proper temperature of the gasifier should be between 625-850 degrees C where more than 70% H-2 can be obtained. Xiaolongtan coal has the lowest hydrogen fraction for introducing amounts of CH4 into the reaction system. Carbon conversion in the gasifier was 0.68, while other carbon was burned in regenerator to provide the needed heat for CaCO3 decomposition. Hydro-en production efficiency of 46.45% was achieved by Huainan coal at H2O/C = 3 in the gasifier and regeneration system. which has 85.9% H-2 in product gas. The flow balance of mass and enthalpy about the gasifier and regenerator system was also investigated. (c) 2005 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：945 / 952

页数：8

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