Characteristics of Zhundong coal in chemical looping combustion with natural hematite as oxygen carrier

GE Hui-jun; SHEN Lai-hong; GU Hai-ming; SONG Tao; JIANG Shou-xi

Feb 2016

Article Contents

JOURNAL OF MECHANICAL ENGINEERING > 2016 > 44(2): 184-191.

GE Hui-jun, SHEN Lai-hong, GU Hai-ming, SONG Tao, JIANG Shou-xi. Characteristics of Zhundong coal in chemical looping combustion with natural hematite as oxygen carrier[J]. JOURNAL OF MECHANICAL ENGINEERING, 2016, 44(2): 184-191.

Citation:

GE Hui-jun, SHEN Lai-hong, GU Hai-ming, SONG Tao, JIANG Shou-xi. Characteristics of Zhundong coal in chemical looping combustion with natural hematite as oxygen carrier[J]. JOURNAL OF MECHANICAL ENGINEERING, 2016, 44(2): 184-191.

Citation:

PDF( 883 KB)

Characteristics of Zhundong coal in chemical looping combustion with natural hematite as oxygen carrier

More Information

Corresponding author: Tel: +86-25-5771 4489, E-mail: lhshen@seu.edu.cn
Received Date: 14 Sep 2015
Rev Recd Date: 16 Nov 2015

Abstract

Abstract

The characteristics of high-sodium Zhundong coal in chemical looping combustion (CLC) as well as the migration of sodium upon combustion were investigated in a fluidized-bed reactor with natural hematite as the oxygen carrier, in order to mitigate the severe slagging and fouling problems and enhance the utilization efficiency of Zhundong coal.The results indicated that the carbon conversion and reaction rate for Zhundong coal in CLC were evidently higher than those of other coals at 850-1 000℃; aluminosilicate Na₂O·Al₂O₃·6SiO₂ of high melting point is formed in the CLC process, which is effective to mitigate the severe slagging and fouling problems.During a 10-cycle CLC test, the reactivity of hematite increases with the increase of cycle number, whereas the sodium content in the CLC fly ash is reduced.
- Zhundong coal,
- chemical looping combustion,
- slagging and fouling,
- high sodium coal,
- natural hematite,
- oxygen carrier

FullText(HTML)

References(21)

References

[1]	HAMMOND G P, AKWE S S O, WILLIAMS S.Techno-economic appraisal of fossil-fuelled power generation systems with carbon dioxide capture and storage[J].Energy, 2011, 36(2):975-984. doi: 10.1016/j.energy.2010.12.012
[2]	李虹, 董亮, 段红霞.中国可再生能源发展综合评价与结构优化研究[J].资源科学, 2011, 33(3):431-440. http://www.cnki.com.cn/Article/CJFDTOTAL-ZRZY201103009.htm LI Hong, DONG Liang, DUAN Hong-xia.On comprehensive evaluation and optimization of renewable energy development in China[J].Resour Sci, 2011, 33(3):431-440. http://www.cnki.com.cn/Article/CJFDTOTAL-ZRZY201103009.htm
[3]	刘敬, 王智化, 项飞鹏.准东煤中碱金属的赋存形式及其在燃烧过程中的迁移规律实验研究[J].燃料化学学报, 2014, 42(3):316-322. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18373.shtml LIU Jing, WANG Zhi-hua, XIANG Fei-peng.Modes of occurrence and transformation of alkali metals in Zhundong coal during combustion[J].J Fuel Chem Technol, 2014, 42(3):316-322. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18373.shtml
[4]	翁青松, 王长安, 车得福.准东煤碱金属赋存形态及对燃烧特性的影响[J].燃烧科学与技术, 2014, 20(3):216-221. http://www.cnki.com.cn/Article/CJFDTOTAL-RSKX201403004.htm WENG Qing-song, WANG Chang-an, CHE De-fu, FU Zi-wen.Alkali metal occurrence mode and its influence on combustion characteristics in Zhundong coals[J].J Combust Sci Technol, 2014, 20(3):216-221. http://www.cnki.com.cn/Article/CJFDTOTAL-RSKX201403004.htm
[5]	杨忠灿, 刘家利, 何红光.新疆准东煤特性研究及其锅炉选型[J].热力发电, 2010, 39(8):38-40. http://www.cnki.com.cn/Article/CJFDTOTAL-RLFD201008013.htm YANG Zhong-can, LIU Jia-li, HE Hong-guang.Study on properties of zhundong coal in Xinjiang region and type-selection for boilers burning this coal sort[J].Therm Power Gen, 2010, 39(8):38-40. http://www.cnki.com.cn/Article/CJFDTOTAL-RLFD201008013.htm
[6]	邱忠, 梁进林.循环流化床锅炉燃烧新疆准东五彩湾煤的对策探讨[J].应用能源技术, 2013, (12):16-19. QIU Zhong, LIANG Jin-lin.Circulating fluidized bed boiler burning Xinjiang Wucaiwan area in Zhundong coal measures[J].Appl Energ Technol, 2013, (12):16-19.
[7]	杨忠灿, 刘家利, 姚伟.准东煤灰沾污指标研究[J].洁净煤技术, 2013, 19(2):81-84. http://www.cnki.com.cn/Article/CJFDTOTAL-JJMS201302023.htm YANG Zhong-can, LIU Jia-li, YAO Wei.Fouling index of Zhundong coal ash[J].Clean Coal Technol, 2013, 19(2):81-84. http://www.cnki.com.cn/Article/CJFDTOTAL-JJMS201302023.htm
[8]	VAN EYK P J, ASHMAN P J, NATHAN G J.Mechanism and kinetics of sodium release from brown coal char particles during combustion[J].Combust Flame, 2011, 158(12):2512-2523. doi: 10.1016/j.combustflame.2011.05.005
[9]	SCHURMANN H, MONKHOUSE P B, UNTERBERGER S.In situ parametric study of alkali release in pulverized coal combustion:Effects of operating conditions and gas composition[J].Proc Combust Inst, 2007, 31(2):1913-1920. doi: 10.1016/j.proci.2006.07.040
[10]	SONG T, SHEN T, SHEN L.Evaluation of hematite oxygen carrier in chemical-looping combustion of coal[J].Fuel, 2013, 104:244-252. doi: 10.1016/j.fuel.2012.09.030
[11]	GU H, SHEN L, XIAO J.Iron ore as oxygen carrier improved with potassium for chemical looping combustion of anthracite coal[J].Combust Flame, 2012, 159(7):2480-2490. doi: 10.1016/j.combustflame.2012.03.013
[12]	GU H, SHEN L, XIAO J, CHEN D, ZHANG S.K₂CO₃-decorated iron ore for chemical looping combustion of anthracite in a 1kWth reactor.Proceedings of the 9th China-Korea Workshop on Clean Energy Technology, Huangshan, China, 2012.
[13]	SONG T, SHEN L, XIAO J.Nitrogen transfer of fuel-N in chemical looping combustion[J].Combust Flame, 2012, 159(3):1286-1295. doi: 10.1016/j.combustflame.2011.10.024
[14]	张思文, 沈来宏, 肖军.基于碱金属和过渡金属修饰铁矿石载氧体的煤催化燃烧[J].燃料化学学报, 2015, 40(10):1179-1187. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18041.shtml ZHANG Si-wen, SHEN Lai-hong, XIAO Jun, GU Hai-ming, SONG Tao.Catalytic combustion of coal using alkali and transition metals loaded on iron ore oxygen carrier[J].J Fuel Chem Technol, 2015, 40(10):1179-1187. http://rlhxxb.sxicc.ac.cn/CN/abstract/abstract18041.shtml
[15]	WU H, QUYN D M, LI C Z.Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal.Part Ⅲ.The importance of the interactions between volatiles and char at high temperature[J].Fuel, 2002, 81(8):1033-1039. doi: 10.1016/S0016-2361(02)00011-X
[16]	QUYN D M, WU H, BHATTACHARYA S P, LI C Z.Volatilisation and catalytic effects of alkali and alkaline earth metallic species during the pyrolysis and gasification of Victorian brown coal.Part Ⅱ.Effects of chemical form and valence.Fuel, 2002, 81(2):151-158. doi: 10.1016/S0016-2361(01)00128-4
[17]	LYNGFELT A.Chemical-looping combustion of solid fuels-status of development[J].Appl Energy, 2014, 113:1869-1873. doi: 10.1016/j.apenergy.2013.05.043
[18]	KOSMINSKI A, ROSS D P, AGNEW J B.Reactions between sodium and kaolin during gasification of a low-rank coal[J].Fuel Process Technol, 2006, 87(12):1051-1062. doi: 10.1016/j.fuproc.2005.06.004
[19]	WALL C J, GRAVES J T, ROBERTS E J.How to burn salty sludges[J].Chem Eng, 1975, 82(8):77-82.
[20]	KOELBEL H, GIEHRING H.Action of alkali promoters upon iron catalysts.VI.Influence of potassium carbonate upon selectivity[J].Brennst Chem, 1963, 44(11).
[21]	LINFENG Z, PEIMIN GUO, PEI Z.Study on catalytic mechanism of gasbased reduction of iron ore[J].Iron Steel Vanadium Titanium, 2008, 39(1):1-5.