Adsorbents for pressure swing adsorption of hydrogen sulfide and carbon dioxide
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1. Now that it is known that both hydrogen sulfide and carbon dioxide have diameters of less than 4Å, molecular sieve adsorbents are not suitable for this purpose. Are there any better adsorbents that can be used for the separation of carbon dioxide and hydrogen sulfide through pressure swing adsorption? 2. Assuming it’s hydrogen sulfide, carbon dioxide, and ammonia at the moment, do any experts have good methods for separating and purifying these three substances? Since ammonia and hydrogen sulfide will dissolve and react in the presence of a solution, the absorption method isn’t feasible. Currently, the only option that comes to mind is pressure swing adsorption; however, no suitable adsorbent has been found to separate and purify these three substances
Has the original poster found a suitable method? I’m also worried about this issue at the moment. All I know so far are MDEA and low-temperature methanol washing; MDEA has slightly higher requirements for the feed gas, and the concentration of hydrogen sulfide after purification is around 99%. Low-temperature methanol washing is not yet well understood; the original poster can take a look at it.