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等离子体热解煤制乙炔结焦机理的研究
Mechanism of carbon deposits formed during plasma pyrolysis of coal for acetylene production
查看参考文献8篇
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文摘
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利用新疆长焰煤为原料在2MW等离子体热解煤制乙炔中试装置上进行热解实验时反应器壁上有结焦物生成. 为了有助于实验中减少乃至避免它们的生成,通过SEM以及XRD方法对这些结焦物进行了研究. 结果表明:位于反应器不同部位处的结焦物具有不同的微观形貌. 在此基础上推测了结焦物的生成机理,即混合段壁侧结焦物通过铜的催化作用生成,第1以及第2反应段壁侧结焦物由煤粉碎片所组成;相应的气体侧结焦物则分别通过气-固、气-固以及焦油的吸附/去氢反应生成. 结焦物的石墨化程度往下游方向逐渐增强,这一现象由结焦物自身石墨化属性所决定 |
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其他语种文摘
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The carbon deposits were formed on the reactor wall during plasma pyrolysis of Xinjiang candle coal in the 2 MW plasma pyrolysis pilot-plant. To make for reducing or avoiding their formation during the experiment, these carbon deposits were studied by the scanning electronic microscope (SEM) and X-ray diffraction (XRD) methods. The result shows that the carbon deposits located at different parts in the reactor present a distinguishing microscopic pattern, and their formation mechanism is deduced. The wall-side carbon deposits of the mixing sector are formed through copper catalysis, while wall-side carbon deposits of the first and second reaction sectors are composed of coal powder fragments. The gas-side carbon deposits accordingly are formed by gas-solid, gas-solid and tars absorption/dehydrogenation reaction respectively. The graphitization degree of the carbon deposits increases downwards, which depends on their own graphitization property |
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来源
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化学工程
,2010,38(3):99-102 【核心库】
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关键词
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煤
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等离子体
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热解
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结焦物
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SEM
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XRD
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地址
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中国科学院等离子体物理研究所, 安徽, 合肥, 230031
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-9954 |
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学科
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化学工业 |
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文献收藏号
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CSCD:3936918
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