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浙江大学学报(工学版)
能源工程与动力工程     
褐煤快速热解半焦理化特性及气化活性
孙强,张彦威,李谦,王智化,葛立超,周志军,岑可法
浙江大学 能源清洁利用国家重点实验室,浙江 杭州 310027
Physical and chemical characteristics and gasification reactivity of lignite fast pyrolysis char
SUN Qiang, ZHANG Yan wei, LI Qian, WANG Zhi hua, GE Li chao, ZHOU Zhi jun, CHEN Ke fa
State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310058,China
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摘要:

为了研究长停留时间,大给料量条件下褐煤快速热解半焦的比表面积、孔径分布、表面官能团的变化规律及不同热解条件下半焦的CO2气化活性,在自制沉降炉上进行平庄褐煤热解温度600~1 000 ℃快速裂解实验,并用N2吸附法、傅里叶变换红外光谱法及非等温热重分析法对半焦进行表征.结果表明,随着热解温度增加比表面积先增大后减小,当热解温度为900 ℃时比表面积最大,孔径分布主要集中在中孔及微孔.官能团的红外光谱吸收随热解温度升高而减少,800 ℃为分界点,800 ℃以下随着热解温度提高,光谱吸收显著减少,800 ℃以上减少幅度降低,随着热解温度增加,煤焦芳香度加剧.煤焦气化活性与比表面积并无严格相关性.

Abstract:

The pyrolysis of Pingzhuang lignite was performed in a homemade drop-tube furnace under long residence time and large feed amount condition at 600~1000 ℃ to study the changes of specific surface area (SSA), pore size distribution, surface functional groups and gasification reactivity in CO2 atmosphere. The chars were characterized by N2 adsorption, FTIR and non-isothermal thermosgravimetric analysis.The result shows that SSA increases at first then decreases with the rise of pyrolysis temperature and reaches the maximum at 900 ℃.The pore size is mainly distributed in mesopore and micropore. The spectrum absorption of functional groups declines with the temperature increasing. 800 ℃ is the critical condition. When temperature is below 800 ℃, the absorption reduces significantly as the temperature increases. While the absorption diminishes slowly when temperature is above 800 ℃. The aromatic degree increases with the rising of temperature. Gasification reactivity has little relevance with SSA.

出版日期: 2016-11-01
:  TQ 54  
基金资助:

国家“973”重点基础研究发展计划资助项目(2012CB214906).

通讯作者: 张彦威,男,副教授. ORCID:0000-0002-1055-2680.     E-mail: zhangyw@zju.edu.cn
作者简介: 孙强(1989-),男,硕士生.从事煤炭分级清洁利用方面的研究. ORCID:0000-0002-5199-1217. E-mail: sunqiang@zju.edu.cn
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引用本文:

孙强,张彦威,李谦,王智化,葛立超,周志军,岑可法. 褐煤快速热解半焦理化特性及气化活性[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.11.001.

SUN Qiang, ZHANG Yan wei, LI Qian, WANG Zhi hua, GE Li chao, ZHOU Zhi jun, CHEN Ke fa. Physical and chemical characteristics and gasification reactivity of lignite fast pyrolysis char. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.11.001.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.11.001        http://www.zjujournals.com/eng/CN/Y2016/V50/I11/2045

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