Abstract: A system, comprises: a regenerative unit configured to receive a compressed fluid stream and generate a treated fluid stream based on the compressed fluid stream; one or more membrane separation units configured to generate a methane-rich stream and a permeate recycle stream based on the treated fluid stream; and a volatile organic compounds (VOC) polishing bed configured to receive the permeate recycle stream and remove organic compounds from the permeate recycle stream to generate a VOC treated stream, wherein the system is configured to route the VOC treated stream from the VOC polishing bed downstream of the regenerative unit, and processes relating thereto.

Abstract: In some embodiments, a system, and at least one method relating thereto, comprises a temperature swing adsorption (TSA) vessel comprising: an inlet and an outlet configured to provide a fluid flow through the TSA vessel; and a TSA media disposed within the TSA vessel, wherein the TSA media comprises: a first layer comprising a first material; a second layer comprising a second material configured to remove water from the fluid flow, wherein the second layer is downstream of the first layer with respect to the fluid flow; and a third layer comprising a third material configured to remove one or more hydrocarbons, volatile organic compounds (VOCs), or a combination thereof, from the fluid flow, wherein the third layer is downstream of the second layer with respect to the fluid flow.

Abstract: Recovering sulfur from a gas stream containing hydrogen sulfide by oxidizing the gas stream to convert the hydrogen sulfide in the gas stream to sulfur oxide, and thus form a sulfur oxide enriched gas stream. The sulfur oxide enriched gas stream is contacted with a solid, sulfation resistant adsorbent bed at relatively low temperatures to extract the sulfur oxides and retain them as sulfur compounds, thus forming a sulfur oxide depleted gas stream. The adsorbent bed is then contacted with an inert or reducing gas stream to reduce the retained sulfur compounds to sulfur and/or sulfur dioxide and thereby form an enriched sulfur and/or sulfur dioxide bearing stream. The elemental sulfur is recovered and/or the sulfur dioxide bearing stream may be recycled to the Claus unit for further conversion.