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OALib Journal期刊
ISSN: 2333-9721
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富氢气氛对煤热解特性的影响
, PP. 36-41
Keywords: 煤热解,富氢气氛,热天平,升温速率,脱硫
Abstract:
利用热天平对陕西延长烟煤进行ar，ch4，h2及3种混合气(φ(ch4)∶φ(h2)分别为1∶1，2∶1，1∶2)气氛下的热解实验。结果表明：随着升温速率的增加,ch4气氛下延长煤失重增加,而h2气氛下失重减小；与惰性气氛相比,在h2和ch4气氛中,气氛气体会促进煤热解失重；在高温时,h2和ch4混合气氛中过多的h2不利于煤热解时挥发分的析出,但h2对ch4的炭化有抑制作用；通过eds，sem和化学法分析,富氢气氛比惰性气氛更利于s的脱除,形成的煤焦孔结构更显著;混合气氛中煤焦表面颗粒物相对于ch4气氛减少。
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