半焦的多循环气化活性及微观结构分析

景旭亮; 王志青; 余钟亮; 房倚天

半焦的多循环气化活性及微观结构分析

1.
中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原 030001;
2.
中国科学院大学, 北京 100049

基金项目: 国家自然科学基金(21106173); 山西省自然科学基金(2013021007-2); 中国科学院战略性先导科技专项(XDA07050100); 中国科学院山西煤炭化学研究所青年人才基金(2011SQNRC).

详细信息

通讯作者:
房倚天

中图分类号: TQ546
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出版历程
- 收稿日期: 2013-04-29
- 修回日期: 2013-06-17
- 刊出日期: 2013-08-30

Multi-circulated gasification reactivity of coal char and its microstructure analysis

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 为了研究工业流化床气化条件下多循环过程中半焦的气化活性及微观结构变化规律,在快速反应固定床装置上,对三种不同煤阶的半焦进行了模拟多循环气化.通过残焦质量计算得到了循环次数对半焦碳转化率的影响,并利用孔隙分析仪和XRD分析仪考察了半焦的微观结构变化.结果表明,随循环次数的增加,低阶霍林河褐煤半焦的转化率增加,而神木烟煤和晋城无烟煤半焦的转化率降低.多循环过程中"冷淬"效应的存在使得半焦的BET比表面积和微孔比表面积随循环次数呈"山形"趋势变化,而石墨化结构与转化率的变化趋势一致,是决定碳转化率变化的决定性因素.
- 流化床 /
- 比表面积 /
- 碳微晶结构 /
- 气化活性
Abstract: To investigate the variation in gasification reactivity and microstructure of char from the multi-circulation fluidized bed gasifier, 3 chars from different rank coals were gasified in a simulated multi-circulated reactor (rapid heating-up fixed bed). The carbon conversion was calculated from the weight of residues, and the structure was analyzed by pore and XRD analyzer. The results show that with the increase of cycle time, the carbon conversion of low rank HLH lignite char increases while that of SM bituminous and JC anthracite chars decrease. The evolutions of BET surface area and micropore area have a peak value with the circulate time. The variation of graphitization is similar with the carbon conversion, which can be considered as the key factor to determine the carbon conversion.
- fluidized bed gasifier /
- surface area /
- carbon crystalline structure /
- gasification reactivity

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参考文献(13)

JING X L, WANG Z Q, YU Z L, ZHANG Q, LI C Y, FANG Y T. Experimental and kinetic investigations of CO₂ gasification of fine chars separated from a pilot-scale fluidized-bed gasifier [J]. Energy Fuels, 2013, 27(5): 2422-2430.

VÁRHEGYI G, SEBESTYN Z, CZGNY Z, LEZSOVITS F, KÖNCZÖL S. Combustion kinetics of biomass materials in the kinetic regime[J]. Energy Fuels, 2012, 26(2): 1323-1335.

MONDAL P, DANG G S, GARG M O. Syngas production through gasification and cleanup for downstream applications-Recent developments[J]. Fuel Process Technol, 2011, 92(8): 1395-1410.

REN H J, ZHANG Y Q, FANG Y T, WANG Y. Co-gasification behavior of meat and bone meal char and coal char[J]. Fuel Process Technol, 2011, 92(3), 298-307.

张林仙, 黄戒介, 房倚天, 王洋. 中国无烟煤焦气化活性的研究—水蒸气与二氧化碳气化活性的比较[J]. 燃料化学学报, 2006, 34(3): 265-269. (ZHNAG Lin-xian, HUANG Jie-jie, FANG Yi-tian, WANG Yang. Study on reactivity of Chinese anthracite chars gasification—comparison of reactivity between steam and CO₂ gasification[J]. Journal of Fuel Chemistry and Technology, 2006, 34(3): 265-269.)

WU S Y, GU J, ZHANG X, WU Y Q, GAO J S. Variation of carbon crystalline structures and CO₂ gasification reactivity of Shenfu coal chars at elevated temperatures[J]. Energy Fuels, 2008, 22(1): 199-206.

OCHOA J, CASSANELLO M, BONELLI P, CUKIERMAN A. CO₂ gasification of Argentinean coal chars: a kinetic characterization[J]. Fuel Process Technol, 2001, 74(3): 161-176.

黄艳琴, 苏德仁, 阴秀丽, 吴创之, 马隆龙. 木粉焦CO₂和H₂O气化过程中孔结构及反应性的变化[J]. 燃料化学学报, 2011, 39(6): 432-437. (HUANG Yan-qin, SU De-ren, YIN Xiu-li, WU Chuang-zhi, MA Long-long. Changes of pore structure and reactivity during CO₂ and H₂O gasification of fir char[J]. Journal of Fuel Chemistry and Technology, 2011, 39(6): 432-437.)

李庆峰, 房倚天, 张建民, 王洋, 时铭显, 孙国刚. 气化活性与孔比表面积的关系[J]. 煤炭转化, 2003, 26(3): 45-48. (LI Qing-feng, FANG Yi-tian, ZHANG Jian-min, WANG Yang, SHI Ming-xian, SUN Guo-gang. Relationship of gasification activity and pore structure[J]. Coal Conversion, 2003, 26(3): 45-48.)

朱子彬, 马智华, 林石英, 平户瑞穗, 堀尾正靱. 高温下煤焦气化反应特性(Ⅱ): 细孔构造对煤焦气化反应的影响[J]. 化工学报, 1994, 45(2): 155-161. (ZHU Zi-bin, MA Zhi-hua, LIN Shi-ying, MITSUHO H, MASAYUKI H. Characteristics of coal char gasification at high temperature(Ⅱ): The effect of pore structure on coal char gasification[J]. Journal of Chemical Industry and Engineering (China), 1994, 45(2): 155-161.

WANG B, SUN L S, SU S, XIANG J, HU S, FEI H. Char structural evolution during pyrolysis and its influence on combustion reactivity in air and oxy-fuel conditions[J]. Energy Fuels, 2012, 26(3): 1565-1574.

BLANCO LPEZ M C, MARTINEZ-ALONSO A, TASCN J M D. N₂ and CO₂ adsorption on activated carbon fibres prepared from Nomex chars[J]. Carbon, 2000, 38(8): 1177-1182.

赵冰, 周志杰, 丁路, 于广锁. 快速热处理石油焦与煤的微观结构变化及气化活性分析[J]. 燃料化学学报, 2013, 41(1): 40-45. (ZHAO Bing, ZHOU Zhi-jie, DING Lu, YU Guang-suo. Changes in the microstructure and gasification reactivity of petroleum coke and coal samples after rapid pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2013, 41(1): 40-45.)

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