| 摘要 |
Granulated Activated Carbon (GAC) is used to remove hydrogen sulfide (H<SUB>2</SUB>S) from the biogas produced in an anaerobic digester. The cleaned biogas is then combusted in a reciprocating engine. The exhaust of the engine is passed through a heat exchanger and then through GAC in an adsorber to adsorb nitrogen oxides (NOx) and any sulfur oxides (SOx). The GACs containing NOx, H<SUB>2</SUB>S, and SOx, are transported to a microwave reactor, mixed, and exposed to microwave energy. The H<SUB>2</SUB>S and NOx are desorbed from the GAC and chemically combined to produce nitrogen, carbon dioxide, sulfur and water. Unreacted nitrogen oxides or hydrogen sulfide are transported to a second reactor containing carbon media to be reacted by a further microwave process. Sulfur is removed with a filter as a solid and the remaining inert components are vented to the atmosphere. The GAC is regenerated and reused to remove additional H<SUB>2</SUB>S and NOx.
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