生物质气化原位吸储氢吸附强化水汽变换制氢

Hydrogen production from sorption-enhanced water gas shrift of biomass gasification by in-situ H_(2)adsorption

为研究废樟木生物质原料空气气化,通过吸氢材料(Mg_(2)Ni)原位吸储氢WGS(水汽变换)制取纯氢气,通过Aspen Plus搭建生物质气化吸附强化制氢模型,研究温度、空气当量比、Mg_(2)Ni储氢材料用量和蒸汽与碳摩尔比x_(S/C)对原位储氢生物质气化吸附强化水汽变换制氢的影响。结果表明:添加Mg_(2)Ni储氢材料原位吸储氢强化了WGS反应,提高了氢气的产率和一氧化碳转化率,加热Mg_(2)NiH_(4)释放纯氢气;水蒸气含量的增加促进了WGS反应并抑制了甲烷反应;在能量分析中,生成的氢气能量占系统输入总能量的42.7%,为系统输入总[火用]的54.9%,说明通过吸氢材料原位吸附来制取氢气可以获得高质量的氢气,并在加热吸附剂的过程中获得纯氢气。

Pure hydrogen was prepared from waste camphor wood biomass by in situ absorption and WGS(water gas shift)of hydrogen absorbing material(Mg_(2)Ni)through air gasification.Aspen Plus was used to build a biomass gasification adsorption enhanced hydrogen production model.The effects of temperature,equivalent ratio,amount of Mg_(2)Ni hydrogen storage material and molar ratio of steam to carbon x_(S/C)on hydrogen production from biomass gasification adsorption enhanced WGS were studied.The results show that the WGS reaction is strengthened by the addition of Mg_(2)Ni hydrogen storage material.The hydrogen yield and the carbon monoxide conversion are improved,and the pure hydrogen is produced by heating Mg_(2)NiH_(4).The increase in steam content promotes the WGS reaction and inhibits the methane reaction.In the energy analysis,the hydrogen energy ratio is 42.7%of the total energy input to the system.The exergy is 54.9%of the total exergy input to the system.The results show that high quality hydrogen can be obtained by in situ adsorption of hydrogen absorbing materials,and pure hydrogen can be obtained by heating the adsorbent.