成果報告書詳細
管理番号20100000001369
タイトル*平成21年度中間年報 革新的ゼロエミッション石炭ガス化発電プロジェクト 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(H20-H22)
公開日2010/9/9
報告書年度2009 - 2009
委託先名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
部署名クリーンコール開発推進部
和文要約和文要約等以下本編抜粋:1. 共同研究の内容及び成果等 (1)研究開発の背景と目的 地球温暖化問題からCO2排出量の削減が強く求められる中、CCS(CO2分離・回収・貯留)に注目が集まっている。火力発電分野におけるCO2削減のため、今後は石炭火力におけるCCSの可能性を検討する必要がある。しかし、現状のCCS技術は多量のエネルギーを要するため、発電効率を可能な限り高く維持すること、さらにはCO2回収コストを大幅に削減することが必要である。 本事業では、テーマ設定型基盤研究において、石炭ガス化システムから回収したCO2をガス化剤の一部として用いることにより、CO2回収コストを大幅に削減し、かつ石炭ガス化システムの効率を大幅に向上可能なCO2回収型次世代IGCCシステムの実用基盤技術を開発し、CO2回収後においても最新鋭微粉炭火力並の送電端効率42%を目指す。具体的には、本システムに関し、CO2による石炭ガス化性能向上効果の解明と実証、乾式ガス精製技術の最適化、実用規模プラントのFSなどを実施する。また、アジアなど環太平洋地域の多様な石炭に対する適応性を検討する。
英文要約CCS is expected as countermeasure for global warming problem. Utility companies are required to reduce CO2 emission form power stations. To keep high efficiency, this project plans to develop innovative IGCC technology. This is to gasify coal with CO2 recycled from flue gas, with mixing O2. CRIEPI and Kyusyu Univ. jointly executed various examinations. CRIEPI clarified parameters for reaction model based on L-H model applicable for DA coal, using PDTF, and clarified difference of reaction characteristics between MN coal and DA coal. Gunma Univ. executed experiments using Oxygen isotope, and clarified detailed reaction in O2/CO2 gas. Kyoto Univ. reformed lignite by original method and successfully evaluated its reforming effect on reactivity by pressurized reactor. CRIEPI simulated O2/CO2 coal gasifier by original code and clarified CO concentration distribution and so on. CRIEPI completed construction of CO2 supply system for bench scale gasifier. CRIEPI confirmed the characteristics of their original desulfurization sorbent, and clarified effect of operating condition on carbon deposition. As feasibility study on O2/CO2 gasifier, CRIEPI clarified development target of each elemental technology and tried to design layout of IGCC plant. To support practical examinations by CRIEPI, Kyusyu University executed following investigations from fundamental scientific point of view. 1)Atmospheric TGA analysis clarified effect of gas composition on reactivity differs between DA coal and MN coal. 2)To modify and validate detail chemical reaction model, pyrolytic reactivity of DA coal were investigated by using DT-TR. 3) Numerical simulation with FLUENT & CEA, was performed for O2/CO2 blown gasifier, whose design was similar to air blown two-staged entrained flow gasifier, and clarified heating value of Syngas and gas temperature in combustor and so on were enough high for the stable operation. 4)To clarify microscopic behavior on char surface, the effect of gas composition and the relative particle velocity in boundary layer near char particle were evaluated. 5)Pyrolysis experiments in N2/CO2 gas proved carbon fiber was formed. 6)The behavior of mineral matters in coal was analyzed by inorganic component analysis and XRD, and effect of mineral matters on gasification reaction was examined. 7)The properties, structures and behaviors of the ash produced in gasification reaction were
considered. 8)Experimental apparatus to evaluate ash deposition behavior on the wall was introduced. 9)Ash compositions and high temperature viscosity of DA and MN coal were measured. XRD and solid NMR evaluated the effect of mullite formation on viscosity. 10)Hot thermocouple method could evaluate high temperature slag behavior. 11)The combustion rate of H2-O2-CO2-H2O premixed flame was measured in constant volume combustor. 12)The numerical simulation method to evaluate the behavior of molten slag was constructed.
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