Absorption of hydrogen sulfide by sodium carbonate solution
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Is the absorption of hydrogen sulfide by sodium carbonate solution a reversible reaction? Is there hydrogen sulfide vapor above the surface of the absorbed sodium carbonate solution?
This post was last edited by CrackingMan on 2012-4-7 at 22:02. It is reversible, and its absorption effect isn’t very good. Since the alkalinity of sodium carbonate is not very high, only the alkalinity of the carbonate ion can be utilized for absorption. Meanwhile, hydrogen sulfide can only be converted into HS−; therefore, the absorption efficiency is rather poor. Whether there is hydrogen sulfide vapor on the surface of the absorbing solution depends on the concentration of the mixture after absorption, including both the original concentration of the sodium carbonate solution and the concentration of hydrogen sulfide that has been absorbed.