Hydrogen production by partial oxidative gasification of biomass and its model compounds in supercritical water
Hydrogen production by partial oxidative gasification of biomass and its model compounds in supercritical water
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DOI：
10.1016/j.ijhydene.2009.06.059
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发表时间：
2010-04
影响因子：
7.2
通讯作者：
H. Jin;Youjun Lu;Liejin Guo;Changqing Cao;Ximin Zhang
中科院分区：
文献类型：
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作者：
H. Jin;Youjun Lu;Liejin Guo;Changqing Cao;Ximin Zhang
超临界水部分氧化气化是生物质制氢的一项新技术。本文首先从理论角度对超临界水部分氧化气化过程进行了分析，并利用热力学模型计算了化学平衡气态产物。其次，在流化床系统中研究了氧化剂当量比对模型化合物（葡萄糖、木质素）和实际生物质（玉米芯）在超临界水中部分氧化气化的影响。实验结果表明，氧化剂可以提高气化效率，在一定的反应条件下，适当添加氧化剂可以提高氢气的产率。当ER = 0.4时，木质素的气化效率是无氧化剂的3.1倍。当ER = 0.1时，木质素产氢率比不添加氧化剂时提高了25.8%。研究了温度、压力、原料浓度和原料流量等操作参数对气化过程的影响。得到了超临界水部分氧化气化的最佳操作参数。
Partial oxidative gasification in supercritical water is a new technology for hydrogen production from biomass. Firstly in this paper, supercritical water partial oxidative gasification process was analyzed from the perspective of theory and chemical equilibrium gaseous product was calculated using the thermodynamic model. Secondly, the influence of oxidant equivalent ratio on partial oxidative gasification of model compounds (glucose, lignin) and real biomass (corn cob) in supercritical water was investigated in a fluidized bed system. Experimental results show that oxidant can improve the gasification efficiency, and an appropriate addition of oxidant can improve the yield of hydrogen in certain reaction condition. When ER equaled 0.4, the gasification efficiency of lignin was 3.1 times of that without oxidant. When ER equaled 0.1, the yield of hydrogen from lignin increased by 25.8% compared with that without oxidant. Thirdly, the effects of operation parameters including temperature, pressure, concentration, and flow rate of feedstock on the gasification were investigated. The optimal operation parameters for supercritical water partial oxidative gasification were obtained.