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Chemoadsorption for Separation of Hydrogen Sulfide from Biogas with Iron Hydroxide and Sulfur Recovery
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-07-01 , DOI: 10.1002/ceat.202000032
Marc Lincke 1 , Uwe Petasch 1 , Uwe Gaitzsch 2 , Andreas Tillmann 3 , Michael Tietze 4 , Falko Niebling 4
Affiliation  

Hydrogen sulfide (H2S) removal from biogas is essential to allow biogas storage in the natural gas grid. Several established methods exist, most of them making use of non‐reusable substrates such as iron sponge or active carbon. Coated metallic foams provide a reusable sustainable alternative. Several iron oxides and hydroxides were tested to validate the H2S adsorption properties before and after thermal regeneration, i.e., sulfur removal. Amorphous iron hydroxide proved to efficiently clean biogas after maximum four sulfur removal cycles and showed an almost ten times larger capacity for sulfur adsorption than crystalline hematite Fe2O3. Very low H2S contents could be realized until breakthrough.

中文翻译:

氢氧化铁与化学吸附法分离沼气中的硫化氢及硫的回收

从沼气中去除硫化氢(H 2 S)对于将沼气存储在天然气网格中至关重要。存在几种已建立的方法,其中大多数利用不可重复使用的基材,例如海绵铁或活性炭。涂层金属泡沫提供了可重复使用的可持续替代品。测试了几种氧化铁和氢氧化铁,以验证热再生(即脱硫)前后的H 2 S吸附性能。事实证明,经过最多四个脱硫循环后,无定形氢氧化铁可以有效净化沼气,并显示出比结晶赤铁矿Fe 2 O 3大十倍的硫吸附能力。H 2 S含量极低,直至实现突破。
更新日期:2020-07-01
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