生物质一步制氢的热力学分析及实验研究

THERMODYNAMIC ANALYSIS AND EXPERIMENTAL INVESTIGATION ON HYDROGEN PRODUCTION GROM BIOMASS GASIFICATION IN A SINGLE-STEP

根据最小吉布斯自由能理论,采用ASPEN模拟软件,计算分析了生物质一步制氢过程中,温度、压力、汽碳比以及钙碳比对气化过程的影响,并对该制氢过程进行了实验研究。研究结果表明,随气化温度的升高,气体产物中氢的含量增加;生物质一步制氢比较适宜的气化压力约为2.0MPa;在最佳的压力范围内,钙碳比合适的比例为2.0;高的汽碳比可以抑制甲烷的生成,但其值大于5后其影响明显减弱。对不同种类的生物质的实验研究表明:种类广泛的生物质,均能在该文确定的条件下实现一步制氢和二氧化碳等的同步脱除。

On the basis of Gibbs free energy minimization, using the ＂ASPEN Plus＂ software, the effects of temperature, pressure, ratio of steam to carbon and ratio of calcium to carbon on the hydrogen production process were analyzed, and experimental research was carried out on the process. The research results showed that hydrogen concentration increases with the temperature, the appropriate pressure range for single-step hydrogen production is about 2.0MPa, good ratio of calcium to carbon is 2 in the appropriate pressure range, high ratio of steam to carbon can restrain the formation of methane. But the impact weakens distinctly when the value exceeds 5. The study of the different kinds of reactants was found that extensive biomasses can achieve hydrogen production as well as carbon dioxide separation simultaneously.