| Influences of Temperature and Coal Particle Size on the Flash Pyrolysis of Coal in a Fast-entrained Bed |
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| 作者姓名： | CUI Li-jie LIN Wei-gang YAO Jian-zhong |
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| 作者单位： | CUI Li-jie 1，2**，LIN Wei-gang 1 and YAO Jian-zhong 1 1. Multi-phase Reaction Laboratory，Institute of Process Engineering，Chinese Academy of Sciences，Beijing 100080，P. R. China; 2. Graduate School，Chinese Academy of Sciences，Beijing 100080，P. R. China |
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| 基金项目： | 中国科学院资助项目，the National Program of Basic Research，the National Program of High Tech. Research and Development |
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| 摘 要： | IntroductionCoal is the major primary energy source in China,which accounts for about three quarters of the total en-ergy consumption.Most of coal in China contains a rel-atively high content of volatile substances.The reserveof lignite accounts for about…
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| 关 键 词： | 煤 高温分解 流化床 粒度 急骤热解 |
| 文章编号： | 1005-9040（2006）-01-103-08 |
| 收稿时间： | 2005-01-23 |
Influences of Temperature and Coal Particle Size on the Flash Pyrolysis of Coal in a Fast-entrained Bed |
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| CUI Li-jie LIN Wei-gang YAO Jian-zhong.Influences of Temperature and Coal Particle Size on the Flash Pyrolysis of Coal in a Fast-entrained Bed[J].Chemical Research in Chinese University,2006,22(1):103-110. |
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| Authors: | Li-jie CUI Wei-gang LIN Jian-zhong YAO |
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| Institution: | aMulti-phase Reaction Laboratory, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, P. R. China;bGraduate School, Chinese Academy of Sciences, Beijing 100080, P. R. China |
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| Abstract: | The experiments on the flash pyrolysis of a lignite were carried out in a fast-entrained bed reactor as a basic study on a so-called 'coal topping process'. The investigation focused on the effects of pyrolysis temperature and coal particle size on the product distribution and composition. The experimental results show that an increase in the pyrolysis temperature results in a higher yield of gaseous products while a larger particle size leads to a decrease of the liquid yield. An optimum temperature for the liquid yield was found to be 650 ℃. A certain amount of phenol groups was found in the liquid products, which may be used to produce high-valued fine chemicals. The FTIR analyses of the coal and chars show that aliphatic structures in the chars are gradually replaced by aromatic structures with the increasing of pyrolysis temperature and coal particle size. The results of this study provide fundamental data and optimal conditions to maximize light oils yields for the coal topping process. |
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| Keywords: | Fluidized Bed Coal Flash pyrolysis Particle Size Temperature |
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