Influence of calcium oxide on Shengli lignite char microstructure and steam gasification performance

LI Yang; LIU Yang; FENG Wei; ZHAO Bin; ZHI Ke-duan; TENG Ying-yue; SONG Yin-min; HE Run-xia; ZHOU Chen-liang; LIU Quan-sheng

Volume 43 Issue 09

Sep. 2015

Turn off MathJax

Article Contents

Article Navigation > Journal of Fuel Chemistry and Technology > 2015 > 43(09): 1038-1043

LI Yang, LIU Yang, FENG Wei, ZHAO Bin, ZHI Ke-duan, TENG Ying-yue, SONG Yin-min, HE Run-xia, ZHOU Chen-liang, LIU Quan-sheng. Influence of calcium oxide on Shengli lignite char microstructure and steam gasification performance[J]. Journal of Fuel Chemistry and Technology, 2015, 43(09): 1038-1043.

Citation:

LI Yang, LIU Yang, FENG Wei, ZHAO Bin, ZHI Ke-duan, TENG Ying-yue, SONG Yin-min, HE Run-xia, ZHOU Chen-liang, LIU Quan-sheng. Influence of calcium oxide on Shengli lignite char microstructure and steam gasification performance[J]. Journal of Fuel Chemistry and Technology, 2015, 43(09): 1038-1043.

Citation:

LI Yang, LIU Yang, FENG Wei, ZHAO Bin, ZHI Ke-duan, TENG Ying-yue, SONG Yin-min, HE Run-xia, ZHOU Chen-liang, LIU Quan-sheng. Influence of calcium oxide on Shengli lignite char microstructure and steam gasification performance[J]. Journal of Fuel Chemistry and Technology, 2015, 43(09): 1038-1043.

PDF( 880 KB)

Influence of calcium oxide on Shengli lignite char microstructure and steam gasification performance

1.
Department of Chemical Engineering, Inner Mongolia University of Technology, Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, China;
2.
School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China

Received Date: 2015-05-04
Rev Recd Date: 2015-06-21
Publish Date: 2015-09-30

Abstract

Abstract

The Influence of calcium oxide on Shengli lignite char microstructure and steam gasification performance was studied. Demineralized coal samples were loaded with different content of calcium oxide and then pyrolyzed at 1 100 ℃. The char is gasified with steam in a micro fixed-bed reactor. The X-ray diffraction apparatus and Raman spectra apparatus were used to characterize the structure of coal char. The results show that the char with 5% calcium exhibits the highest gasification reactivity, while the catalysis for the steam gasification of char with 2% calcium is almost negligible. The results of XRD suggest that calcium can effectively hinder the carbon graphitization in the process of pyrolysis. The intensity of (002) and (100) peaks of char decreases with the rise of calcium loading. With the increase of calcium loading, the aromaticity f_a is reduced from 66.8% to 39.9%. Raman spectra results show that I_D/I_G increases from 1.363 to 1.541 and I_G/I_all reduces from 0.423 to 0.394 with the increase of calcium loading, respectively. It means that the decomposition of large polyaromatic ring structure in coal is greatly enhanced by the catalytic action of calcium, and the disordering degree and the structural defects of char increase with the increase of calcium loading.
- Shengli lignite char,
- calcium oxide,
- steam gasification,
- microstructure,
- Raman spectra

FullText(HTML)

References(26)

References

边岳, 徐宝山, 王本水, 曹景沛, 赵小燕, 魏贤勇. 胜利褐煤负载镍生物质气化催化剂实验研究[J]. 洁净煤技术, 2014, 20(6): 13-18. (BIAN Yue, XU Bao-shan, WANG Ben-shui, CAO Jing-pei, ZHAO Xiao-yan, WEI Xian-yong. Preparation of nickel-loaded on Shengli lignite catalysts for catalytic gasification of biomass[J]. Clean Coal Technol, 2014, 20(6): 13-18.)

许修强, 王永刚, 陈宗定, 白磊, 张锟俊, 杨萨莎, 张书. 水蒸气对褐煤原位气化半焦反应性能及微观结构的影响[J]. 燃料化学学报, 2015, 43(1): 1-8. (XU Xiu-qiang,WANG Yong-gang,CHEN Zong-ding,BAI Lei,ZHANG Kun-jun,YANG Sa-sha,ZHANG Shu. Influence of cooling treatments on char microstructure and reactivity of Shengli brown coal[J]. J Fuel Chem Technol, 2015, 43(1): 1-8.)

许修强, 王永刚, 张书, 陈宗定, 陈绪军, 贺欣. 褐煤原位气化半焦的反应性及微观结构的演化行为[J]. 燃料化学学报, 2015, 43(3): 273-280. (XU Xiu-qiang,WANG Yong-gang,ZHANG Shu,CHEN Zong-ding,CHEN Xu-jun,HE Xin. Evolution behavior of reactivity and microstructure of lignite char during in-situ gasification with steam[J]. J Fuel Chem Technol, 2015, 43(3): 273-280.)

周晨亮, 刘全生, 李阳, 智科端, 滕英跃, 宋银敏. 胜利褐煤水蒸气气化制富氢合成气及其固有矿物质的催化作用[J]. 化工学报, 2013, 64(6): 2092-2102. (ZHOU Chen-liang, LIU Quan-sheng, LI Yang, ZHI Ke-duan, TENG Ying-yue, SONG Yin-min. Production of hydrogen-rich syngas by steam gasification of Shengli lignite and catalytic effect of inherent minerals[J]. CIESC J, 2013, 64(6): 2092-2102.)

ZHUANG X G, QUEROL X, ALASTUEY A, JUAN R, PLANA F, LOPEZ-SOLER A, DU G, MARTYNOV V V. Geochemistry and mineralogy of the Cretaceous Wulantuga high-germanium coal deposit in Shengli coal field, Inner Mongolia, Northeastern China[J]. Int J Coal Geol, 2006, 66(1): 119-136.

HUANG W H, WAN H, DU G, SUN L, MA Y Y, TANG X Y, WU W, QIN S L. Research on element geochemical characteristics of coal-ge deposit in Shengli coalfield, Inner Mongolia, China[J]. Earth Sci Front, 2008, 15(4): 56-64.

LIN S Y, WANG Y, SUZUKI Y. Effect of coal rank on steam gasification of coal/CaO mixtures[J]. Energy Fuels, 2007, 21(5): 2763-2768.

WANG J, YAO Y H, CAO J Q, JIANG M Q. Enhanced catalysis of K₂CO₃ for steam gasification of coal char by using Ca(OH)₂ in char preparation[J]. Fuel, 2010, 89(2): 310-317.

朱廷钰, 张守玉, 黄戒介, 王洋. 氧化钙对流化床煤温和气化半焦性质的影响[J]. 燃料化学学报, 2000, 28(1): 40-43. (ZHU Ting-yu, ZHANG Shou-yu, HUANG Jie-jie, WANG Yang. Effect of calcium oxide on properties of char from fluidized bed coal mild gasification[J]. J Fuel Chem Technol, 2000, 28(1): 40-43.)

FELDMANN H F, CREAMER K S. Coal catalyzation to simplify the conversion of coal to SNG. Final report, March 1988-May 1990. Battelle Memorial Inst., Columbus, OH (USA), 1990.

李绍锋, 吴诗勇. 高温下煤焦的碳微晶及孔结构的演变行为[J]. 燃料化学学报, 2010, 38(5): 513-517. (LI Shao-feng, WU Shi-yong. Evolvement behavior of carbonm inicrystal and pore structure of coal chars at high temperatures[J]. J Fuel Chem Technol, 2010, 38(5): 513-517.)

杨景标, 蔡宁生. 催化剂对褐煤焦孔隙结构和表面形态的影响[J]. 中国电机工程学报, 2008, 28(11): 24-29. (YANG Jing-biao, CAI Ning-sheng. Effects of catalysts on the pore structure and morphology of a lignite char[J]. Proc CSEE, 2008, 28(11): 24-29.)

ROUZAUD J N, OBERLIN A. Structure, microtexture, and optical properties of anthracene and saccharose-based carbons[J]. Carbon, 1989, 27(4): 517-529.

JIAO Y, TIAN W J, CHEN H L, SHI H G, YANG B B, LI C, SHAO Z P, ZHU Z P, LI S D. In situ catalyzed Boudouard reaction of coal char for solid oxide-based carbon fuel cells with improved performance[J]. Appl Energy, 2015, 141: 200-208.

LU L M, KONG C H, SAHAJWALLA V, HARRIS D. Char structural ordering during pyrolysis and combustion and its influence on char reactivity[J]. Fuel, 2002, 81(9): 1215-1225.

SONIBARE O O, HAEGER T, FOLEY S F. Structural characterization of Nigerian coals by X-ray diffraction, Raman and FT-IR spectroscopy[J]. Energy, 2010, 35(12): 5347-5353.

TREJO F, ANCHEYTA J, MORGAN T J, HEROD A A, KANDIYOTI R. Characterization of asphaltenes from hydrotreated products by SEC, LDMS, MALDI, NMR, and XRD[J]. Energy Fuels, 2007, 21(4): 2121-2128.

齐学军, 郭欣, 罗重奎, 郑楚光. 热解过程中铁对神府褐煤焦结构的影响[J]. 工程热物理学报, 2014, 35(4): 796-800. (QI Xue-Jun, GUO Xin, LUO Zhong-kui, ZHENG Chu-guang. Effect of Iron on the structure of Shenfu Brown coal char during pyrolysis[J]. J Eng Thermophys, 2014, 35(4): 796-800.)

QI X J, GUO X, XUE L C, ZHENG C G. Effect of iron on Shenfu coal char structure and its influence on gasification reactivity[J]. J Anal Appl Pyrol, 2014, 110: 401-407.

LI X J, LI C Z. FT-Raman spectroscopic characterisation of chars from the pyrolysis of coals of varying rank[J]. J Fuel Chem Technol, 2005, 33(4): 385-390.

LI X J, HAYASHI J I, LI C Z. FT-Raman spectroscopic study of the evolution of char structure during the pyrolysis of a Victorian brown coal[J]. Fuel, 2006, 85(12): 1700-1707.

齐学军, 宋文武, 刘亮. Fe对胜利褐煤焦结构和气化反应性能的影响[J]. 燃料化学学报, 2015, 43(5): 554-559. (QI Xue-jun, SONG Wen-wu, LIU Liang. Effect of iron on Shengli brown coal char structure and its influence on gasification reactivity[J]. J Fuel Chem Technol, 2015, 43(5): 554-559.)

柳晓飞, 尤静林, 王媛媛, LU Li-ming, 解迎芳, 余立旺, 伏清. 澳大利亚烟煤热解的拉曼光谱研究[J]. 燃料化学学报, 2014, 42(3): 270-276. (LIU Xiao-fei, YOU Jing-lin, WANG Yuan-yuan, LU Li-ming, XIE Ying-fang, YU Li-wang, FU Qing. Raman spectroscopic study on the pyrolysis of Australian bituminous coal[J]. J Fuel Chem Technol, 2014, 42(3): 270-276.)

FERRARI A C. Raman spectroscopy of graphene and graphite: Disorder, electron-phonon coupling, doping and nonadiabatic effects[J]. Solid State Commun, 2007, 143(1): 47-57.

WANG F J, ZHANG S, CHEN Z D, LIU C, WANG Y G. Tar reforming using char as catalyst during pyrolysis and gasification of Shengli brown coal[J]. J Anal Appl Pyrolysis, 2014, 105: 269-275.

ZAIDA A, BAR-ZIV E, RADOVIC L R, LEE Y J. Further development of Raman microprobe spectroscopy for characterization of char reactivity[J]. Proc Combust Inst, 2007, 31(2): 1881-1887.

Relative Articles

Supplements(0)

Cited By

Proportional views