Coal tar pyrolysis to acetylene in thermal plasma

被引：0

作者：

Li, Xuan ^{[1
]}

Han, Jiantao ^{[1
]}

Wu, Changning ^{[1
]}

Guo, Yi ^{[1
]}

Yan, Binhang ^{[2
]}

Cheng, Yi ^{[2
]}

机构：

[1] National Institute of Clean-and-Low-Carbon Energy, Beijing

[2] Department of Chemical Engineering, Tsinghua University, Beijing

来源：

Huagong Xuebao/CIESC Journal | 2014年 / 65卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Chemical reactors; Coal tar; Multiphase reaction; Pyrolysis; Thermal plasma;

D O I：

10.3969/j.issn.0438-1157.2014.09.051

中图分类号：

学科分类号：

摘要：

The pyrolysis of coal tar using thermal plasma provides a direct and cleaner route to produce acetylene with low hazardous emission, since the ultra-high temperatures and concentrated active species in thermal plasma can easily decompose solid/liquid/gas feedstock into smaller molecules. Experiments were carried out in a lab-scale thermal plasma test platform to investigate the effects of key operating conditions including the sample inject temperature, plasma atmosphere, and coal tar specific enthalpy on the performance of coal tar pyrolysis. The results demonstrated that coal tar can be rapidly cracked to acetylene and other light gases in the thermal plasma reactor. The viscosity of coal tar can be decreased by pre-heated, thereby increasing the mix efficiency between coal tar and thermal plasma jet. The increased hydrogen concentration in plasma working gases improves the coal tar conversion and the yield of acetylene, and reduces coking as well. Higher specific input power of coal tar leads to higher coal tar conversion, acetylene yield and the yields of light gases. 86.3% coal tar conversions, 24.6% acetylene yields and 51.7% yield of light gases were obtained in the optimal experiment. In addition, plasma pyrolysis process can generate ethylene as by-products, and the concentration ratio of ethylene to acetylene can be used to predict the gas reaction temperature. © All Rights Reserved

引用

页码：3680 / 3686

页数：6

共 30 条

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