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助熔剂对生物质灰熔点和半焦气化的影响分析

, PP. 42-47

Keywords: 生物质能,气流床,助熔剂,灰熔点,半焦

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Abstract:

为了满足生物质气流床气化液态排渣的要求,研究了CaO与Fe2O3作为助熔剂对高灰熔点生物质的助熔效果,并考察了其对生物质半焦气化的影响。结果表明:当助熔剂CaO质量分数介于0.3~0.4之间时,稻壳灰熔点有明显的降低;当助熔剂Fe2O3质量分数在0~0.5之间并逐渐增大时,稻壳灰熔点急剧下降。CaO与Fe2O3在质量分数较低时对半焦气化都有一定的催化作用,能够提高碳转化速率,但是随着质量分数的增加,助熔剂附着在多孔半焦的表面,阻碍气化介质与半焦的接触,使气化效果下降。

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