纳米钙基吸附剂脱碳强化生物乙醇蒸汽重整制氢工艺

摘要

将纳米钙基二氧化碳吸附剂用于反应脱除二氧化碳,强化生物乙醇蒸汽重整制氢反应过程.研究反应温度、水醇摩尔比和反应空速等工艺条件对乙醇制氢反应转化率和产物氢气浓度的强化作用效果.研究表明,在常压下,反应温度为560℃,水醇摩尔比为7:1,乙醇体积空速为800 h-1时,乙醇转化率为90.5%,气相色谱检测反应产物气体中氢气浓度为98.2%,CO浓度仅为0.05%,无CO2存在.研究结果对采用生物乙醇制氢提供燃料电池原料氢气具有参考意义.%A nano Ca-based CO2adsorbent was used to facilitate sorption enhanced steam reforming of bio-ethanol. Effects of reaction temperature, steam to ethanol molar ratio and ethanol space velocity on bio-ethanol conversion and hydrogen content were studied. The results show that ethanol conversion is 90.5% under reaction conditions of steam to ethanol molar ratio = 7:1, ethanol volume space velocity = 800 h-1, reaction temperature = 560℃ and atmospheric pressure. Hydrogen concentration at outlets is 98.2% and carbon monoxide concentration is 0.05% without carbon dioxide detected. This study is helpful for hydrogen production from bio-ethanol for fuel cell application.