石炭のガス化過程における灰挙動と付着現象(<特集>BRAIN-Cプログラム)

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This report deals with comprehensive studies on ash formation, ash deposition and growth of the deposition layer during gasification. For the ash formation, both the coagulation model for the included mineral particles and the splitting model for the excluded mineral particles are developed, based on the experimental and analytical results obtained. For the ash deposition process, the ash deposition characteristics depend on properties of ash in raw coals, especially for the melting temperature. The fine ash particles selectively adhere at the initial stage of deposition. The ash compositions of the depositing particles differ from those of the ash particles in the char particles before deposition. For growth of the ash deposition layer, both the melting tests for several types of coal ash and the chemical equilibrium calculations on the molten phases of some ash compositions contribute to modeling the growth behaviors of ash deposition layer during gasification. Finally, the actual coal gasification tests are conducted at atmospheric pressure, using a bench-scale coal gasifier, to confirm the validity of some models developed in these studies.
一般社団法人日本エネルギー学会の論文
2006-01-20