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Show 1/18 Experi.ent Pertaining to Desulfurization. Dust Removal and Carbon Monoxide Shift Reaction in Gas in Coal Gasification Process Tohru Ishii', Mikio Shimoj 0 2 and Jun Wada 2 1.Boiler R&D Department, Ishikawajima-Harima Heavy Industries Co. ,Ltd 2-16, Toyosu 3-Chome, Koto-ku, Tokyo 135 Japan 2.Coal Technology Department, Engineering Development Center, Engineering R&D Administration, Tokyo Electric Power Company 1-1-3 Uchisaiwai-cho, Chiyoda-ku. Tokyo 100. Japan Abstract In an integrated coal gasification combined cycle power generation system, the clean-up process of fuel gas before its combustion can now be appl ied. An advantage of this process is that the volume of gas to be treated is very smal I as it is put under pressure (20 to 30kg/cm 2 G) before combustion, so that environment control faci I ities and eQuipment can be made relatively compact. The experiment focuses on dust removal, desulfurization, and carbonmonoxide (CO) shift reaction for the construction of carbon dioxide recovery systems. In our experiment, gas produced from the Texaco type gasifier, having a capacity of feeding six tons of coal per day, was used. A ceramic fi Iter was employed for dust removal, whi Ie a fluidized-bed desulfurization unit using iron oxide and a fixed-bed zinc oxide-based desulfurization unit. employed to achieve higher performance, was uti lized for desulfurization. For shift reaction of carbon monoxide, a catalyst currently used for industrial purposes was appl ied. Using these units, more than 900 hours of tests was carried out. Up ti I I now, a dust removal efficiency of over 99%, a CO-conversion rate of 40% and a desulfurization efficiency of 97% to 98% for a combined of the fluidized-bed and fixed-bed were achieved. |
