碳酸钾催化的铁基氧载体煤催化化学链燃烧

余钟亮; 李春玉; 景旭亮; 丁亮; 房倚天; 黄戒介

碳酸钾催化的铁基氧载体煤催化化学链燃烧

余钟亮^1,2,
李春玉¹,
景旭亮^1,2,
丁亮^1,2,
房倚天^1,,
黄戒介¹

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: 山西省青年科技研究基金(2012021005-4).

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: 2013-05-19
- 修回日期: 2013-06-04
- 刊出日期: 2013-07-30

Catalytic chemical looping combustion of coal with iron-based oxygen carrier promoted by K₂CO₃

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: 研究了K₂CO₃催化剂及惰性担体对铁基氧载体煤化学链燃烧的影响.实验结果表明,K₂CO₃的添加可明显促进铁基氧载体与煤之间的反应速率,其原因可归结为从氧载体上迁移到煤颗粒上的K₂CO₃对煤-CO₂气化步骤的催化作用(该步骤为整个还原过程的速率控制步骤);由于K₂CO₃本身的促熔效果及加入K₂CO₃后导致的剧烈氧化还原反应,可以发现,K₂CO₃会增大铁基氧载体的烧结;不同惰性担体对铁基氧载体与煤的反应性影响不大,这是由于惰性担体对还原速控步没有影响;K₂CO₃在多循环化学链燃烧过程中依然可以保持一定的催化活性,另外由于催化剂的流失与失活,使得氧载体的反应活性有所下降.
- 催化 /
- 化学链燃烧 /
- 煤 /
- 氧载体 /
- 氧化铁 /
- 碳酸钾
Abstract: Effects of K₂CO₃ addition and inert supports on chemical looping combustion (CLC) of coal with iron-based oxygen carrier were investigated. The results indicate that the reduction of iron-based oxygen carrier by coal can be remarkably improved by the addition of K₂CO₃. This enhancement can be ascribed to the catalytic CO₂ gasification (rate-controlling step) by K₂CO₃ which migrates from oxygen carrier to coal particles. The sintering of iron-based oxygen carrier is promoted by K₂CO₃ due to its low melting temperature and the intensified redox reaction after K₂CO₃ addition. The inert support has no significant effect on the reactivity between coal and oxygen carrier, which could be due to the inert support do not affect the rate-limiting step. The catalytic activity can be observed during several redox cycles. However, there is a decreasing tendency of activity due to the loss and deactivation of catalyst.
- catalyst /
- chemical looping combustion /
- coal /
- oxygen carrier /
- iron oxide /
- K₂CO₃

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参考文献(16)

ISHIDA M, JIN H. A new advanced power-generation system using chemical-looping combustion[J]. Energy, 1994, 19(4): 415-422.

ISHIDA M, JIN H, OKAMOTO T. A Fundamental study of a new kind of medium material for chemical-looping combustion[J]. Energy Fuels,1996, 10(4): 958-963.

ADANEZ J, DE DIEGO L F, GARCIA-LABIANO F, GAYAN P, ABAD A, PALACIOS J M. Selection of oxygen carriers for chemical-looping combustion[J]. Energy Fuels, 2004, 18(2): 371-377.

ABAD A, MATTISSON T, LYNGFELT A, JOHANSSON M. The use of iron oxide as oxygen carrier in a chemical-looping reactor[J]. Fuel, 2007, 86(7/8): 1021-1035.

WANG S Z, WANG G X, JIANG F, LUO M, LI H Y. Chemical looping combustion of coke oven gas by using Fe₂O₃/CuO with MgAl₂O₄ as oxygen carrier[J]. Energy Environ Sci, 2010, 3(9): 1353-1360.

CAO Y, PAN W P. Investigation of chemical looping combustion by solid fuels. 1. Process analysis[J]. Energy Fuels, 2006, 20(5): 1836-1844.

CAO Y, CASENAS B, PAN W P. Investigation of chemical looping combustion by solid fuels: 2. Redox reaction kinetics and product characterization with coal, biomass, and solid waste as solid fuels and CuO as an oxygen carrier[J]. Energy Fuels, 2006, 20(5): 1845-1854.

黄振, 何方, 李海滨, 赵增立. 固体燃料化学链燃烧技术的研究进展[J]. 煤炭转化, 2010, 33(4): 83-89. (HUANG Zhen, HE Fang, LI Hai-bin, ZHAO Zeng-li. Study on development of chemical-looping combustion for solid fuels[J]. Coal Conversion, 2010, 33(4): 83-89.)

陈定千, 沈来宏, 肖军, 宋涛, 顾海明, 张思文. 基于镍基修饰的铁矿石载氧体煤化学链燃烧实验[J]. 燃料化学学报, 2012, 40(3): 267-272. (CHEN Ding-qian, SHEN Lai-hong, XIAO Jun, SONG Tao, GU Hai-ming, ZHANG Si-wen. Experimental investigation of hematite oxygen carrierdecorated with NiO for chemical looping combustion of coal[J]. Journal of Fuel Chemistry and Technology, 2012, 40(3): 267-272.)

HOSSAIN M M, DE LASA H I. Chemical-looping combustion (CLC) for inherent CO₂ separations-A review[J]. Chem Eng Sci, 2008, 63(18): 4433-4451.

ADANEZ J, ABAD A, GARCIA-LABIANO F, GAYAN P, DE DIEGO L F. Progress in chemical-looping combustion and reforming technologies[J]. Prog Energy Combust Sci, 2012, 38(2): 215-282.

SCOTT S, DENNIS J, HAYHURST A, BROWN T. In situ gasification of a solid fuel and CO₂ separation using chemical looping[J]. AIChE J, 2006, 52(9): 3325-3327.

GU H, SHEN L, XIAO J, ZHANG S, SONG T, CHEN D. Iron ore as oxygen carrier improved with potassium for chemical looping combustion of anthracite coal[J]. Combust Flame, 2012, 159(7): 2480-2490.

YU Z, LI C, JING X, ZHANG Q, FANG Y, ZHAO J, HUANG J. Effects of CO₂ atmosphere and K₂CO₃ addition on the reduction reactivity, oxygen transport capacity, and sintering of CuO and Fe₂O₃ oxygen carriers in coal direct chemical looping combustion[J]. Energy Fuels, 2013, 27(5): 2703-2711.

YU Z, LI C, FANG Y, HUANG J, WANG Z. Reduction rate enhancements for coal direct chemical looping combustion with an iron oxide oxygen carrier[J]. Energy Fuels, 2012, 26(4): 2505-2511.

洪冰清, 陈凡敏, 王兴军, 于广锁. KOH 负载量对不同煤样加氢气化效果影响的实验研究[J]. 燃料化学学报, 2012, 40(9): 1032-1037. (HONG Bing-qing, CHEN Fan-min, WANG Xing-jun, YU Guang-suo. Effect of KOH loading on different coals hydrogasification[J]. Journal of Fuel Chemistry and Technology, 2012, 40(9): 1032-1037.)

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