Producing hydrogen from hydrogen sulfide

A method comprising:

• heating a feed stream comprising hydrogen sulfide to a preheat temperature;
• after heating the feed stream, converting at least a portion of the hydrogen sulfide in the feed stream into hydrogen and sulfur to form a mixed product stream comprising the hydrogen, the sulfur, and a remaining, unconverted portion of the hydrogen sulfide, wherein the preheat temperature is a temperature that is sufficiently hot to maintain a desired reaction temperature while converting at least the portion of the hydrogen sulfide in the feed stream into hydrogen and sulfur;
• cooling at least a portion of the mixed product stream to condense the sulfur to form a sulfur stream comprising the sulfur that has condensed from the portion of the mixed product stream;
• receiving, by a plurality of pressure swing adsorption beds, an acid gas stream comprising carbon dioxide and hydrogen sulfide;
• and
• separating, by the plurality of pressure swing adsorption beds, at least a portion of the carbon dioxide from the acid gas stream to produce a carbon dioxide stream and the feed stream, the carbon dioxide stream comprising the carbon dioxide that has separated from the acid gas stream, the feed stream comprising a remaining portion of the acid gas stream.