Hydrogen Generation and Desulfurization by Plasma Reforming of Biogas

抄録

An atmospheric packed-bed dielectric barrier discharge is generated by a neon-sign-transformer in an artificial biogas, the mixture ratio of which is CH₄/CO₂ = 60/40 % with H₂S of 2000 ppm, and the decomposition characteristics of the artificial biogas are investigated. It is found that H₂, CO and hydrocarbons (C_xH_y) are produced as major by-products from the biogas, and that H₂ has the highest concentration in the by-products, followed by CO and C_xH_y. It is also found that H₂S addition has little effect on H₂ generation by the plasma reforming of biogas, and that sulfur atoms in H₂S deposit on electrodes and packed materials. The decomposition rates of CH₄ and CO₂ come to approximately 12 % and 10 %, respectively, and H₂ generation-efficiency is 0.85 g/kWh.