| 摘要 |
PURPOSE:To obtain a high-quality product while maintaining a high catalytic activity, by previously desulfurizing a raw material gas in producing a reducing gas by a process which comprises feeding air to a raw material gas in an amt. required for partially burning the raw material gas in the presence of a catalyst comprised of a metal belonging to the Group VIII, to allow the raw material gas to partially burn. CONSTITUTION:A raw material gas is desulfurized in the presence of a chemical absorbent composed mainly of CuO and containing ZnO, Al2O3, etc. incorporated therein, activated carbon chemically modified by adsorbing a halogen or the like thereto or a hydrodesulfurization catalyst (e.g., a catalyst based on nickel, molybdenum, and a sulfide), thereby reducing the sulfur content to 1mg/Nm<3>. The desulfurized gas is fed into a reactor, where the gas is partially burnt at a temp. of 750-1,100 deg.C in the presence of a catalyst comprised of a metal belonging to the Group VIII (e.g., nickel) while air in an amt. 0.8-1.2 times larger than the theoretical amt. of air required for partially burning the gas, thereby obtaining an intended reducing gas. This process can suppress the poisonous action of sulfur on the catalyst. |
