采用浸渍法制备了在水煤气变换(WGS)反应中具有高催化活性的 Ni/γ-Al2O3催化剂,使用柠檬酸法合成出高效 CO2吸收剂 Li2ZrO3纳米材料.在固定床微反应器上对 WGS 和吸附强化水煤气变换(SE-WGS)反应制氢过程进行了比较研究.前者只使用20% Ni/γ-Al2O3催化剂,而后者将20% Ni/γ-Al2O3催化剂与纳米 Li2ZrO3吸收剂混合装填.结果表明,纳米 Li2ZrO3具有比已报道的 CO2吸收剂更快的吸收速率及优异的吸脱附循环稳定性,可应用于吸附强化过程,通过原位吸收 WGS 反应产生的CO2,使得反应超越化学平衡限制,直接制得高纯度 H2.在823 K,0.1 MPa 和 H2O/CO =4的条件下,在 SE-WGS 过程一步制得纯度高于98%的 H2,验证了吸附强化反应进程制高纯氢的可行性.
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