Simulation of Coal Pyrolysis in Plasma Jet by CPD Model

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• 作者：Yajun Tian ; Kechang Xie ; Suyu Zhu ; and Thomas H. Fletcher
• 刊名：Energy & Fuels
• 出版年：2001
• 出版时间：November 2001
• 年：2001
• 卷：15
• 期：6
• 页码：1354 - 1358
• 全文大小：69K
• 年卷期：v.15,no.6(November 2001)
• ISSN：1520-5029

文摘

Reaction of coal in a plasma jet is complex and extremely rapid, and acetylene and carbonmonoxide are the main products in the pyrolysis gas. Coal pyrolysis is assumed as the first stepreaction when coal is injected into hot plasma jet with initial average temperature of 3700 K.Chemical percolation devolatilization (CPD) is employed first to simulate this procedure inmechanism. The calculation results indicate coal pyrolysis rate in plasma jet is very fast and theretention time of coal staying in reactor is only several milliseconds. Comparing the calculationwith experiment result, it was concluded that the CPD agree with the experiment well when thecoal feed rate is larger than about 2.0 g s^-1. As the coal feed rate was increased, the averagetemperature of coal particle during staying in reactor was reduced and the residual time becamelong, but it was not found that the residual time influenced the coal conversion evidently.