成果報告書詳細
管理番号20140000000154
タイトル*平成25年度中間年報 ゼロエミッション石炭火力技術開発プロジェクト ゼロエミッション石炭火力基盤技術開発 革新的ガス化技術に関する基盤研究事業 CO2回収型次世代IGCC技術開発
公開日2014/8/21
報告書年度2014 - 2014
委託先名一般財団法人電力中央研究所 国立大学法人九州大学
プロジェクト番号P08020
部署名環境部
和文要約
英文要約Title: Development of high efficiency oxy-fuel IGCC system. (FY2008-FY2014) FY2013 Annual Report
CCS is one of the counter measures for global warming, but it reduces thermal efficiency. It is significant to develop CO2 capture power station with small efficiency penalty. CRIEPI and Kyusyu Univ. has executed joint development program of high efficiency oxy-fuel IGCC system that can keep high efficiency of 42 % even after capturing CO2. In 2013 following results were obtained in this project. To confirm applicability of subbituminous coal to this system, reactivity was evaluated by DTF and TG, and it was confirmed reaction model extended by CRIEPI can be applied to subbituminous coal. Numerical simulation of 70 TPD gasifier was executed under high O2 concentration supposing O2 blown gasifier, and effect of operation conditions were clarified. 3TPD gasification experiments to collect dust and gas inside gasifier proved reaction zone was extended and partial carbon conversion rate was enhanced by CO2 enrichment. Behavior of fine carbon particle deposited on desulfurization sorbent was confirmed supposing regeneration process of sorbent. Combustion experiments by small scale burner with mixed gas supposing syngas of this system were executed, and the effect of operation conditions on combustion characteristics was clarified. Necessary equipment for bench scale experiments was clarified and its specification was examined. Concerning to gas turbine combustor performance experiments, subjects to be examined in next phase and its small scale equipment were considered. Previous considerations on bench scale gasification experiments were done. To elucidate reaction mechanism in O2/CO2 coal gasification and apply to various coals in Asia, Kyushu Univ. studied the following five research subjects by using experimental and calculation techniques: (1) structure and gasification reactivity of coals and chars, (2)removal of residual O2 in exhaust gas, (3)property, structure, and behavior of ash and slag formed during gasification, (4)operability of CO-rich product gases, and (5)fluidity in gasification reactor. Main results were as below. Partition characteristic toward char and volatile at initial stage of pyrolysis under pressure was investigated. On line analytical method of non-condensable gases was established and that of condensable tar was examined. Effectiveness of application of Perovskite catalyst was also studied using CO and H2 as reducing agents to remove residual O2 in exhaust gas. Furthermore, relationship of microstructure of coal ash and slag with high temperature melting behaviors was investigated by solid-state NMR, XRD, and high temperature viscometer. Also, viscosity of synthetic slags at low viscosity region was precisely elucidated and compositional parameters to estimate viscosity of slag were proposed. Moreover, carbon deposition characteristics of zinc ferrite desulfurization chemical were studied using C-H-O chemical equilibrium ternary diagram. Fluidity of molten slag was also investigated by cold model experiment and simulation.
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