Dual-layered paper-structured catalysts for sequential desulfurization and methane-steam reforming of simulated biogas containing hydrogen sulfide
Dual-layered paper-structured catalysts for sequential desulfurization and methane-steam reforming of simulated biogas containing hydrogen sulfide
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DOI：
10.1007/s10853-016-0332-7
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发表时间：
2016
影响因子：
4.5
通讯作者：
Ayami Saimura;Y. Shiratori;T. Kitaoka
中科院分区：
文献类型：
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作者：
Ayami Saimura;Y. Shiratori;T. Kitaoka
沼气燃料电池使用有机废物产生的低质量沼气，为现场发电机提供超清洁电能提供了巨大的希望。然而，天然沼气含有少量的H2S，这导致蒸汽重整金属催化剂（例如Ni）的快速失活。在这项工作中，我们成功地制备了两种类型的纸结构催化剂，分别含有锰氧化物（MnOx）和镍/镁氧化物（Ni/MgO），分别用于脱硫和甲烷水蒸气重整。在连续脱硫和甲烷水蒸气重整反应中，以MnOx纸和Ni/MgO纸为催化剂，采用双层结构，使模拟沼气连续制氢成为可能。2000 ppm H2S杂质，而单层Ni/MgO纸由于H2S中毒立即失去其催化活性。这种灵活的、可堆叠的和易于处理的纸结构催化剂的组合具有提高能量效率的潜力，并且具有向以氢气为动力的燃料电池系统提供氢气的过程经济性。
Biogas-powered fuel cells that use low-quality biogas produced from organic waste hold a great promise for providing ultra-clean electric energy with on-site power generators. However, natural biogas contains a small amount of H2S, which causes a rapid deactivation of steam-reforming metal catalysts, such as Ni. In this work, we successfully prepared two types of paper-structured catalyst, separately containing manganese oxides (MnOx) and nickel/magnesium oxides (Ni/MgO), for desulfurization and methane-steam reforming, respectively. In the sequential desulfurization and methane-steam reforming, paper catalyst assembly, designed by stacking MnOxpapers upstream and Ni/MgO papers downstream in a dual-layered form, enabled continuous hydrogen production from simulated biogas containing ca. 2000 ppm H2S impurities, whereas single-layered Ni/MgO papers immediately lost their catalytic activity due to the H2S poisoning. This combination of flexible, stackable, and easy-to-handle paper-structured catalysts has the potential to improve the energy efficiency and to process economics of providing hydrogen to biogas-powered fuel-cell systems.