| 热解条件对煤焦-CO2和煤焦-H2O气化的影响 |
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| 引用本文： | 陈超,王静,刘伟,罗光前,张森,尹静姝,姚洪.热解条件对煤焦-CO2和煤焦-H2O气化的影响[J].工程热物理学报,2012(6):1056-1060. |
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| 作者姓名： | 陈超 王静 刘伟 罗光前 张森 尹静姝 姚洪 |
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| 作者单位： | 华中科技大学煤燃烧国家重点实验室 |
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| 基金项目： | 国家863项目(No.2011AA050106);国家重大科学仪器设备开发专项(No.2011YQ120039) |
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| 摘 要： | 采用沉降炉快速热解和管式炉慢速热解的方法制得两种煤焦,通过环境扫描电镜（ESEM）和X射线衍射仪（XRD）分别观察煤焦的形貌结构和测量煤焦的晶体化程度。使用热重在不同的CO2和H2O浓度的气氛条件下研究在CO2浓度和H2O浓度变化时热解条件对煤焦-CO2和煤焦-H2O气化的影响。结果显示对于实验用褐煤,快速热解和慢速热解条件生成的煤焦均以密实型结构焦为主。快速热解和慢速热解条件生成的煤焦的煤焦-CO2和煤焦-H2O气化过程均可以通过收缩核模型很好地拟合。煤焦-H2O反应和煤焦-CO2反应的反应位并不相同。
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| 关 键 词： | 热解 气化 煤焦结构 |
Effect of Pyrolysis Conditions on Char-CO2 and Char-H2O Gasification |
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| CHEN Chao,WANG Jing,LIU Wei,LUO Guang-Qian ZHANG Sen,YIN Jing-Shu YAO Hong.Effect of Pyrolysis Conditions on Char-CO2 and Char-H2O Gasification[J].Journal of Engineering Thermophysics,2012(6):1056-1060. |
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| Authors: | CHEN Chao WANG Jing LIU Wei LUO Guang-Qian ZHANG Sen YIN Jing-Shu YAO Hong |
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| Institution: | (State Key Laboratory of Coal Combustion,Huazhong University of Science & Technology,Wuhan,430074.China) |
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| Abstract: | Two kinds of char were produced by fast pyrolysis using a drop tube furnace,and by slow pyrolysis using a fixed-bed furnace.Scanning electron microscopy and X-ray diffractometry were employed to analyze char structure characterization.Char gasification rates were measured by isothermal thermogravimetric reactor in CO2 or H2O atmosphere.The results show that both fast-char and slow-char are mainly composed of dense char.The non-reacted core model was applicable to predict carbon conversion of chars produced not only by fast pyrolysis method but also by slow pyrolysis method.The char-CO2 and char-H2O reactions did not occur at common active sites. |
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| Keywords: | pyrolysis gasification char structure |
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