Experimental study on the gasification kinetic parameters of biomass chars under CO<sub>2</sub> atmosphere：Ⅰ. Activation energy

DONG Cun-zhen; WANG Xiao-han; ZENG Xiao-jun; SHAO Zhen-hua

Volume 42 Issue 03

Mar. 2014

Turn off MathJax

Article Contents

Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(03): 329-335

DONG Cun-zhen, WANG Xiao-han, ZENG Xiao-jun, SHAO Zhen-hua. Experimental study on the gasification kinetic parameters of biomass chars under CO2 atmosphere：Ⅰ. Activation energy[J]. Journal of Fuel Chemistry and Technology, 2014, 42(03): 329-335.

Citation:

DONG Cun-zhen, WANG Xiao-han, ZENG Xiao-jun, SHAO Zhen-hua. Experimental study on the gasification kinetic parameters of biomass chars under CO₂ atmosphere：Ⅰ. Activation energy[J]. Journal of Fuel Chemistry and Technology, 2014, 42(03): 329-335.

Citation:

PDF( 2305 KB)

Experimental study on the gasification kinetic parameters of biomass chars under CO₂ atmosphere：Ⅰ. Activation energy

1.
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2013-10-28
Rev Recd Date: 2013-12-31
Publish Date: 2014-03-31

Abstract

Abstract

The isothermal gasification tests of 4 biomass samples were performed in CO₂ atmosphere using a thermo-gravimetric analyzer at 750~1 000 ℃. The results show that the gasification reaction rate increases with increasing gasification temperature. Through the dimensionless procedure of r using r_0.2, two different trends of dimensionless gasification reaction rate with carbon conversion are observed when the gasification temperature is changed. Accordingly, activation energies of the biomass chars were calculated by iso-conversion method. It is found that the activation energy of any biomass char is basically constant, not varying with the carbon conversion obviously. Activation energies of different chars are mainly affected by the inorganic mineral composition in the char and can be described in a linear function of the ratio of W_C/W_FC, which is E=233.9-1 005.7×(W_C/W_FC). It can be predicted that the intrinsic activation energy of the biomass char might tend to a certain value 234 kJ/mol if the catalytic effect of the metallic element is ignored.
- biomass,
- CO₂ gasification,
- iso-conversion method,
- activation energy

FullText(HTML)

References(18)

References

宋春财, 胡浩权, 朱盛维, 朱英华. 生物质秸秆热重分析及几种动力学模型结果比较[J]. 燃料化学学报, 2003, 31(4): 311-316. (SONG Chun-cai, HU Hao-quan, ZHU Sheng-wei, ZHU Ying-hua. Biomass pyrolysis and its kinetic parameters with different methods[J]. Journal of Fuel Chemistry and Technology, 2003, 31(4): 311-316.)

DI BLASI C. Combustion and gasification rates of lignocellulosic chars[J]. Prog Energy Combust Sci, 2009, 35(2): 121-140.

KIRKELS A F, VERBONG G P J. Biomass gasification: Still promising? A 30-year global overview[J]. Renew Sust Energy Rev, 2011, 15(1): 471-481.

KAJITANI S, SUZUKI N, ASHIZAWA M, HARA S. CO₂ gasification rate analysis of coal char in entrained flow coal gasifier[J]. Fuel, 2006, 85(2): 163-169.

魏志国, 黄艳琴, 阴秀丽, 吴创之. 玉米芯水解残渣热解焦气化反应性研究[J]. 燃料化学学报, 2012, 40(6): 685-691. (WEI Zhi-guo, HUANG Yan-qin, YIN Xiu-li, WU Chuang-zhi. Gasification reactivity of char from corncob hydrolysis residue[J]. Journal of Fuel Chemistry and Technology, 2012, 40(6): 685-691.)

肖瑞瑞, 陈雪莉, 王辅臣, 于广锁. 生物质半焦CO₂气化反应动力学研究[J]. 太阳能学报, 2012, 33(2): 236-242. (XIAO Rui-rui, CHEN Xue-li, WANG Fu-chen, YU Guang-suo. Research on kinetics characteristics of gasification biomass semi-char with CO₂[J]. Acta Energiae Solaris Sinica, 2012, 33(2): 236-242.)

刘文钊, 余剑, 张聚伟, 高士秋, 许光文. 多孔物质气固反应动力学研究[J]. 中国科学: 化学, 2012, 42(8): 1210-1216. (LIU Wen-zhao, YU Jian, ZHANG Ju-wei, GAO Shi-qiu, XU Guang-wen. Kinetic study of reaction of porous solids[J]. Scientia Sinica Chimica, 2012, 42(8): 1210-1216.)

SEO D K, LEE S K, KANG M W, HWANG J, YU T U. Gasification reactivity of biomass chars with CO₂[J]. Biomass Bioenergy, 2010, 34(12): 1946-1953.

CETIN E, MOGHTADERI B, GUPTA R, WALL T F. Biomass gasification kinetics: Influences of pressure and char structure[J]. Combust Sci Technol, 2005, 177(4): 765-791.

OLLERO P, SERRERA A, ARJONA R, ALCANTARILLA S. The CO₂ gasifcation kinetics of olive residue[J]. Biomass Bioenergy, 2003, 24(2): 151-161.

LIU T, FANG Y, WANG Y. An experimental investigation into the gasification reactivity of chars prepared at high temperatures[J]. Fuel, 2008, 87(4/5): 460-466.

黄艳琴, 阴秀丽, 吴创之, 汪丛伟, 谢建军, 周肇秋, 马隆龙, 李海滨. 稻秆半焦与CO₂气化反应特性的研究[J]. 燃料化学学报, 2009, 37(3): 289-295. (HUANG Yan-qin, YIN Xiu-li, WU Chuang-zhi, WANG Cong-wei, XIE Jian-jun, ZHOU Zhao-qiu, MA Long-long, LI Hai-bin. Study on CO₂ gasification reactivity of rice straw chars[J]. Journal of Fuel Chemistry and Technology, 2009, 37(3): 289-295.)

杨帆, 范晓雷, 周志杰, 刘海峰, 龚欣, 于遵宏. 随机孔模型应用于煤焦与CO₂气化的动力学研究[J]. 燃料化学学报, 2005, 33(6): 671-676. (YANG Fan, FAN Xiao-lei, ZHOU Zhi-jie, LIU Hai-feng, GONG Xin, YU Zun-hong. Kinetics of coal char gasification with CO₂ random pore model[J]. Journal of Fuel Chemistry and Technology, 2005, 33(6): 671-676.)

NAREDI P, YEBOAH Y D, PISUPATI S V. Effect of furnace purging on kinetic rate parameter determination using isothermal thermogravimetric analysis[J]. Energy Fuels, 2011, 25(11): 4937-4943.

FOUGA G G, DE MICCO G, BOH A E. Kinetic study of argentinean asphaltite gasification using carbon dioxide as gasifying agent[J]. Fuel, 2011, 90(2): 674-680.

YIP K, TIAN F J, HAYASHI J, WU H W. Effect of alkali and alkaline earth metallic species on biochar reactivity and syngas compositions during steam gasification[J]. Energy Fuels, 2009, 24(1): 173-181.

ZHANG Y, ASHIZAWA M, KAJITANI S, MIURA K. Proposal of a semi-empirical kinetic model to reconcile with gasification reactivity profiles of biomass chars[J]. Fuel, 2008, 87(4/5): 475-481.

DELECEA C S, ALMELAALARCON M, LINARESSOLANO A. Calcium-catalyzed carbon gasification in CO₂ and steam[J]. Fuel, 1990, 69(1): 21-27.

Relative Articles

Supplements(0)

Cited By

Proportional views