Thermodynamic analysis of hydrogen production by aqueous phase reforming of three model compounds in bio-oils

被引：0

作者：

Xie, Jianjun ^{[1
,2
]}

Yin, Xiuli ^{[1
,2
]}

Su, Deren ^{[1
,2
]}

Wu, Chuangzhi ^{[1
,2
]}

Zhu, Jingxu ^{[3
]}

机构：

[1] Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China

[2] Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510640, China

[3] Department of Chemical Engineering, University of Western Ontario, London N6A5B9, Canada

来源：

Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | 2011年 / 42卷 / 08期

关键词：

Thermoanalysis - Gibbs free energy - Free energy - Methanol - Acetic acid - Ethylene - Ethylene glycol - pH - Carbon - Polyols;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Thermodynamic analysis employing Gibbs free energy minimization for aqueous phase reforming of three model compounds in bio-oils for hydrogen production was presented. Effect of temperature (340~660 K) and pressure ratio psys/pH2O (0.1~2.0) on H2 and CH4 selectivity, carbon formation and conversion of model compounds were calculated. The results showed that when considering both methanation and carbon formation reactions, the conversion of the model compounds were over 99.99% and no carbon formation was found, but mathanation was far more thermodynamically favorable than hydrogen production reaction. H2 selectivity were greatly improved without mathanation. Further analysis showed that the H2 production mechanism was mainly related to directly cracking of model compounds other than to aqueous reforming reaction, however, it was found that about 0.999, 1.940, 1.999 mole solid carbon formed when feeding per mole of methanol, acetic acid and ethylene glycol in the inlet streams. After restricting both mathanation and carbon formation reaction in the system, aqueous phase reforming of methanol, acetic acid and ethylene glycol at temperature of 500 K and psys/pH2O of 1.1 could achieve H2 selectivity of 74.98%, 66.64%, 71.38%, and the conversion of the feedstocks were over 99%.

引用

页码：104 / 110