Biogas, e.g., biomethane, is produced by fermentation of organic matter and can be used as an alternative fuel or as a raw material for the production of hydrogen and syngas. However, biogas includes hydrogen sulfide (H₂S) as a byproduct of fermentation. Hydrogen sulfide is toxic, has a foul odor, corrodes equipments, and deactivates catalysts. Thus, hydrogen sulfide has to be removed before biogas combustion or conversion. Compared with classical wet desulfurization, low-temperature dry desulfurization is of interest due to higher desulfurization, simpler operation, less pollution, and less energy consumption. Here, we review solid sorbents for low-temperature biogas desulfurization, such as activated carbon, metal-exchanged zeolites, single metal oxides, composite metal oxides, ordered mesoporous silica, and metal–organic frameworks.

中文翻译：

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低温下从沼气中捕集硫化氢的吸附剂

沼气，例如生物甲烷，是通过有机物的发酵产生的，可以用作生产氢和合成气的替代燃料或原料。但是，沼气中包含硫化氢（H ₂S）作为发酵的副产物。硫化氢有毒，有恶臭，腐蚀设备，并使催化剂失活。因此，必须在沼气燃烧或转化之前除去硫化氢。与传统的湿法脱硫相比，低温干法脱硫具有更高的脱硫率，更简单的操作，更少的污染和更少的能耗，因此受到人们的关注。在这里，我们回顾了用于低温沼气脱硫的固体吸附剂，例如活性炭，金属交换沸石，单金属氧化物，复合金属氧化物，有序介孔二氧化硅和金属有机骨架。