The invention relates to the field of
plasma chemistry, and discloses a
low temperature plasma apparatus for decomposing
hydrogen sulfide, and a
hydrogen sulfide decomposing method. The apparatus comprises a
gas supply-gas distribution unit, a
plasma reaction unit and a product separation unit, wherein the
gas supply-gas distribution unit, the
plasma reaction unit and the product separation unit are sequentially connected by pipelines, the
plasma reaction unit comprises a
low temperature plasma reactor and a plasma power source, the reactor comprises an inner cylinder, an outer cylinder, a center
electrode arranged in the inner cylinder, a barrier medium and a grounding
electrode, the barrier medium is arranged around the inner side wall of the inner cylinder, or wraps the outer surface ofthe center
electrode, or forms the side wall of the inner cylinder, and a ratio (L1:D1) of the thickness L1 of
discharge gas gap to the thickness D1 of the barrier medium is (0.05-100):1. According to the present invention, with the apparatus and the method, the
hydrogen sulfide conversion rate can be increased.