Effect of dispersion degree of iron on catalytic hydrogasification of coal char

ZHANG Feng; SUN Hao; ZHANG Jian-shu; YAN Shuai; QU Xuan; ZHANG Rong; BI Ji-cheng

Volume 47 Issue 4

Apr. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(4): 402-410

ZHANG Feng, SUN Hao, ZHANG Jian-shu, YAN Shuai, QU Xuan, ZHANG Rong, BI Ji-cheng. Effect of dispersion degree of iron on catalytic hydrogasification of coal char[J]. Journal of Fuel Chemistry and Technology, 2019, 47(4): 402-410.

Citation:

ZHANG Feng, SUN Hao, ZHANG Jian-shu, YAN Shuai, QU Xuan, ZHANG Rong, BI Ji-cheng. Effect of dispersion degree of iron on catalytic hydrogasification of coal char[J]. Journal of Fuel Chemistry and Technology, 2019, 47(4): 402-410.

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Effect of dispersion degree of iron on catalytic hydrogasification of coal char

1.
School of Chemistry and Chemical Engineering/Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan-Provincial Ministry of Education to Build a National Key Laboratory Breeding Base, Shihezi University, Shihezi 832003, China
2.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Funds:

the National Natural Science Foundation of China U1703253

More Information

Corresponding author: ZHANG Jian-shu, Tel：0993-2057277，E-mail: zjschem@163.com
Received Date: 2018-12-06
Rev Recd Date: 2019-02-02

Available Online: 2021-01-23

Publish Date: 2019-04-10

Abstract

Abstract

The effect of dispersibility of Fe on coal chars with different specific surface areas on the catalytic hydrogasification performance was studied in a pressurized fixed bed reactor. The chars and catalysts were characterized by XRD, BET, H₂-TPR, FT-IR, TEM and Raman spectroscopy. The results show that the active site and graphitization degree of coal char are not the only factors affecting the catalytic gasification reaction, but the dispersion of catalyst has a greater impact on the reaction. The larger the specific surface area of coal char is, the more uniform the Fe catalyst disperses on the surface of coal char and the smaller the average grain size of the active component of catalyst is, which can promote the formation of the catalytically hydrogenated mesophase product Fe₃C and methane yield. For 900-char with higher specific surface area, the methane yield can reach 53% when the hydrogen pressure is 2 MPa, the temperature is 750℃ and the Fe loading is 5%. The effect of Fe catalyst loading on the catalytic hydrogasification was investigated with 900-char. It is found that the methane yield increases first and then decreases, and the Fe loading has a saturation point.
- iron,
- hydrogasification,
- catalytic,
- dispersion,
- saturation point

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References(25)

References

[1]	洪冰清, 战书鹏, 王兴军, 王辅臣, 于广锁.不同金属化合物催化呼和浩特煤加氢气化实验研究[J].燃料化学学报, 2012, 40(7):782-789. doi: 10.3969/j.issn.0253-2409.2012.07.003 HONG Bing-qing, ZHAN Shu-peng, WANG Xing-jun, WANG Fu-cheng, YU Guang-suo. Experimental study on Hohhot coal hydrogasification catalysed by different metal compounds[J]. J Fuel Chem Technol, 2012, 40(7):782-789. doi: 10.3969/j.issn.0253-2409.2012.07.003
[2]	JIANG J, LIU Z, LIU Q. Synergetic catalysis of calcium oxide and iron in hydrogasification of char[J]. Energy Fuels, 2017, 31:198-204. doi: 10.1021/acs.energyfuels.6b02026
[3]	OHTSUKA Y, TAMAI Y, TOMITA A. Iron-catalyzed gasification of brown coal at low temperatures[J]. Energy Fuels, 1987, 1(1):32-36. doi: 10.1021/ef00001a006
[4]	MATSUMOTO S. Catalyzed hydrogasification of Yallourn char in the presence of supported hydrogenation nickel catalyst[J]. Energy Fuels, 1991, 5(1):60-63. doi: 10.1021/ef00025a009
[5]	MATSUMOTO S, SAKAGAMI S. Catalytic gasification activity of iron enhanced by spilt-over hydrogen[J]. Stud Surf Sci Catal, 1993, 77:409-412. doi: 10.1016/S0167-2991(08)63223-1
[6]	YAN S, BI J, QU X. The behavior of catalysts in hydrogasification of sub-bituminous coal in pressured fluidized bed[J]. Appl Energy, 2017, 206:401-412. doi: 10.1016/j.apenergy.2017.08.189
[7]	HAGA T, NISHIYAMA Y. Promotion of iron-group catalysts by a calcium salt in hydrogasification of carbons at elevated pressures[J]. Ind Eng Chem Res, 1987, 26:1202-1206. doi: 10.1021/ie00066a023
[8]	YUAN S, ZHANG N, QU X, BI J, CAO Q, WANG J. Promoted catalysis of calcium on the hydrogasification reactivity of iron-loaded subbituminous coal[J]. Fuel, 2017, 200:153-161. doi: 10.1016/j.fuel.2017.03.066
[9]	YUAN S, QU X, ZHANG R, BI J. Effect of calcium additive on product yields in hydrogasification of nickel-loaded Chinese sub-bituminous coal[J]. Fuel, 2015, 147:133-140. doi: 10.1016/j.fuel.2015.01.004
[10]	SUZUKI T, MINAMI H, YAMADA T, HOMMA T. Catalytic activities of ion-exchanged nickel and iron in low temperature hydrogasification of raw and modified birch chars[J]. Fuel, 1994, 73(12):1836-1841. doi: 10.1016/0016-2361(94)90208-9
[11]	ASAMI K, OHTSUKA Y. Catalytic behavior of iron in the gasification of coal with hydrogen[J]. Stud Surf Sci Catal, 1993, 77:413-416. doi: 10.1016/S0167-2991(08)63224-3
[12]	JAWHARI T, ROID A, CASADO J. Raman spectroscopic characterization of some commercially available carbon black materials[J]. Carbon, 1995, 33(11):1561-1565. doi: 10.1016/0008-6223(95)00117-V
[13]	BEYSSAC O, GOFFÉ B, PETITET J P, FROIGNEUX E, MOREAU M, ROUZAUD J N. On the characterization of disordered and heterogeneous carbonaceous materials by Raman spectroscopy[J]. Spectrochim Acta A, 2003, 59(10):2267-2276. doi: 10.1016/S1386-1425(03)00070-2
[14]	CHABALALA V P, WAGNER N, POTGIETER-VERMAAK S. Investigation into the evolution of char structure using Raman spectroscopy in conjunction with coal petrography; Part1[J].Fuel Process Technol, 2011, 92(4):750-756. doi: 10.1016/j.fuproc.2010.09.006
[15]	HE X, ZHANG X, JIAO Y, ZHU J S, CHEN X W, LI C Y, LI H S. Complementary analyses of infrared transmission and diffuse reflection spectra of macerals in low-rank coal and application in triboelectrostatic enrichment of active maceral[J]. Fuel, 2017, 192:93-101. doi: 10.1016/j.fuel.2016.12.009
[16]	李娜, 李阳, 班延鹏, 宋银敏, 周华从, 智科端, 何润霞, 滕英跃, 杨柯利, 刘全生.胜利褐煤焦钙催化水蒸气气化反应中活性微结构分析[J].燃料化学学报, 2016, 44(11):1297-1303. doi: 10.3969/j.issn.0253-2409.2016.11.003 LI Na, LI Yang, BAN Yan-peng, SONG Yin-min, ZHOU Hua-cong, ZHI Ke-rui, HE Run-xia, TENG Ying-yue, YANG Ke-li, LIU Quan-sheng. Analysis of active microstructure during steam gasification of Shengli char catalyzed by calcium component[J]. J Fuel Chem Technol, 2016, 44(11):1297-303. doi: 10.3969/j.issn.0253-2409.2016.11.003
[17]	HASEGAWA Y, OTANI R, YONEZAWA S, TAKASHIM M. Reaction between carbon dioxide and elementary fluorine[J]. J Fluorine Chem, 2008, 128(1):17-28. http://d.old.wanfangdata.com.cn/NSTLQK/NSTL_QKJJ023658796/
[18]	LIU L, CAO Y, LIU Q. Kinetics studies and structure characteristics of coal char under pressurized CO₂gasification conditions[J]. Fuel, 2015, 146:103-110. doi: 10.1016/j.fuel.2015.01.002
[19]	KLOSE W, WÖLKI M. On the intrinsic reaction rate of biomass char gasification with carbon dioxide and steam[J]. Fuel, 2005, 84(7):885-892. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=fd88d51e3f60dbcaf331889c7c65f22b
[20]	MCKEE D W. Effect of metallic impurities on the gasification of graphite in water vapor and hydrogen[J]. Carbon, 1974, 12(4):453-464. doi: 10.1016/0008-6223(74)90011-6
[21]	CHEN Z, WANG F, LI H, YANG Q, WANG L, LI X. Low-temperature selective catalytic reduction of NO_x with NH₃over Fe-Mn mixed-oxide catalysts containing Fe₃Mn₃O₈ phase[J]. Ind Eng Chem Res, 2012, 51(1):202-212. doi: 10.1021/ie201894c
[22]	PINEAU A, KANARI N, GABALLAH I. Kinetics of reduction of iron oxides by H₂:Part I:Low temperature reduction of hematite[J]. Thermochim Acta, 2006, 447(1):89-100. doi: 10.1016/j.tca.2005.10.004
[23]	MATSUMOTO S, JR P L W. char gasification in steam at 1123 K catalyzed by K, Na, Ca and Fe-effect of H₂, H₂S and COS[J]. Carbon, 1986, 24(3):277-285. doi: 10.1016/0008-6223(86)90228-9
[24]	LECEA S M D, ALMELA-ALARCÍN M, LINARES-SOLANO A. Calcium-catalysed carbon gasification in CO₂ and steam[J]. Fuel, 1990, 69(1):21-27. doi: 10.1016/0016-2361(90)90253-M
[25]	战书鹏, 王兴军, 洪冰清, 于广锁, 王辅臣.褐煤催化加氢气化实验研究[J].燃料化学学报, 2012, 40(1):8-14. doi: 10.3969/j.issn.0253-2409.2012.01.002 ZHAN Shu-peng, WANG Xing-jun, HONG Bing-qing, YU Guang-suo, WANG Fu-cheng. Experimental study on catalytic hydrogasification of lignite[J]. J Fuel Chem Technol, 2012, 40(1):8-14. doi: 10.3969/j.issn.0253-2409.2012.01.002