62 褐炭チャー粒子充填層水蒸気ガス化特性の解析とモデリング(ガス化(3))

抄録

Atmospheric steam gasification of brown-coal-derived char particles was investigated with a particular type of fixed-bed reactor over a range of char bed height from ca. 0.5 mm (monolayer) up to 100 mm. Kinetic analysis of gasification of the thinnest char beds enabled to determine a Langmuir-Hinshelwood mechanism/kinetics, that was successfully applied to prediction of syngas formation and steam consumption for the thicker beds quantitatively. It was found that the steam consumption for 100-mm high beds (residence time: 0.6 - 0.7 s) was as high as 54 - 76% at 850℃.