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Show 2/18 Introduction The integrated coal gasification combined cycle power generation (IGCC) system is comprised of a gasifier, a gas clean-up unit and a combined cycle power generation system, as described in Fig. 1. IGCe, boasting highly efficient processing and excel lent environmental compatibility, is expected to achieve early commercial ization. Ishikawajima-Harima Heavy Industries Co. ,Ltd (IHI) and the Tokyo Electric Power Co., (TEPCO) participated in a 120-MW IGCC demonstration project, known as the ·Cool Water Program, N which was carried out in the United States. Beginning in 1987, to improve plant economy, durabi lity, and operabi lity and to real ize commercial appl ication, IHI and TEPCO have been jointly conducting a series of coal gasification tests and research using a 6 tons/day Texaco type coal gasification pi lot plant (CGT). At the initial stage of the project, tests focused on gasification technologies, specifically how to increase the feedstock flexibi I ity for gasification and how to preclude ash deposits in the gasifier. In 1991, when a gas clean-up test faci lity was added to CGT, TEPCO and IHI started research and development activities on dry dust removal and dry desulfurization process and a CO-shifting process that was intended to decarbonize gas from the coal gasification process. This paper reports on the results of these gas clean-up tests. Testing Equip.ent A flow sheet of the 6 tons/day coal gasification pi lot plant is shown in Fig. 2 and that of the gas clean-up test fasi lity is presented in Fig. 3. The gasifier used for the experiment is a Texaco type gasifier having a nominal coal firing rate of 6 tons/day, the major specifications of which are summarized in Table 1. |