Method to prepare one or more chemical products using hydrogen sulfide

A method to prepare one or more chemical products using hydrogen sulfide, the method comprising:

• scrubbing a gas stream to remove hydrogen sulfide from the gas stream into an aqueous liquid that prior to the scrubbing comprises dissolved alkali metal carbonate capture agent, wherein during the scrubbing the alkali metal carbonate capture reagent reacts to capture sulfur of at least a portion of the hydrogen sulfide in the aqueous liquid in the form of alkali metal hydrosulfide and to generate dissolved alkali metal bicarbonate in the aqueous liquid;
• preparing a feed of electrolyte solution feed comprising at least a portion of aqueous liquid including at least a portion of the captured sulfur in a form of dissolved material selected from the group consisting of alkali metal sulfide and alkali metal hydrosulfide;
• and
• electrochemical processing the feed of electrolyte solution to generate alkali metal hydroxide in catholyte and to generate polysulfide in anolyte, the polysulfide comprising at least a portion of the captured sulfur.