Catalytic effects of industrial waste alkali liquor in pressurized steam gasification of coal char

WANG Hui-fang; LI Peng; ZU Jing-ru; LI Ke-zhong

doi:10.19906/j.cnki.JFCT.2021010

Volume 49 Issue 2

Feb. 2021

Turn off MathJax

Article Contents

Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(2): 145-150

WANG Hui-fang, LI Peng, ZU Jing-ru, LI Ke-zhong. Catalytic effects of industrial waste alkali liquor in pressurized steam gasification of coal char[J]. Journal of Fuel Chemistry and Technology, 2021, 49(2): 145-150. doi: 10.19906/j.cnki.JFCT.2021010

Citation:

WANG Hui-fang, LI Peng, ZU Jing-ru, LI Ke-zhong. Catalytic effects of industrial waste alkali liquor in pressurized steam gasification of coal char[J]. Journal of Fuel Chemistry and Technology, 2021, 49(2): 145-150. doi: 10.19906/j.cnki.JFCT.2021010

Citation:

PDF( 852 KB)

Catalytic effects of industrial waste alkali liquor in pressurized steam gasification of coal char

doi: 10.19906/j.cnki.JFCT.2021010

ENN Science & Technology Development Co., Ltd., State Key Laboratory of Coal-based Low Carbon Energy, Langfang 065001, China

Funds: The project was supported by National Science and Technology Support Program (2009BAA25B00), The National Basic Research Program of China (973 Program, 2011CB201305) and International Cooperation in Science and Technology Project (2011DFA60610)

More Information

Corresponding author: Tel：0316-2595824，E-mail：nyyjy@enn.cn
Received Date: 2020-10-28
Rev Recd Date: 2020-11-19
Publish Date: 2021-02-08

Abstract

Abstract

The catalytic activity of an industrial waste alkali liquor for coal gasification was identified, and the WJT coal impregnated of black liquor (BL) was gasified with steam under the temperatures 700−750 ℃ at high pressure. The effects of major process variables such as catalyst loading and temperature were investigated, which was also in comparison with Na₂CO₃ (SC). The results show that with an increase in the catalyst loading the gasification rate and the carbon conversion rise first and then drop, having the highest values at a 3% of Na loading and being higher than that with SC. Meanwhile, the catalytic activity increases with increasing the gasification temperature. The influence of BL addition on the BET surface area and pore volume was studied by an isothermal N₂adsorption-desorption experiment. It is indicated that the BET surface area and pore volume increase at first and then decrease with an increase in the BL loading. The increase of surface area and pore volume provide more gasification active sites and thus promote the reactivity of char gasification. However, the blocking of pores in coal char caused by excess catalyst loading can result in a decrease in the surface area and pore volume and thus the declining of the gasification rate.
- coal,
- catalytic gasification,
- waste alkali liquor,
- black liquor,
- sodium

FullText(HTML)

References(26)

References

[1]	中国煤化工行业年度报告-2019年回顾与未来展望(2020-2024)[R]. 亚化咨询, 2019. Annual report of coal chemical industry in China - Review in 2019 and prospect (2020-2024)[R]. ASIACHEM, 2019.
[2]	HIRSCH R L, GALLAGHER J E, LESSARD R R Jr, WESSELHOFT R D. Catalytic coal gasification-an emerging technology[J]. Science,1982,215(4529):121−127. doi: 10.1126/science.215.4529.121
[3]	NAHAS N C. Exxon catalytic coal gasification process: Fundamentals to flowsheets[J]. Fuel,1989,62:239−243.
[4]	MCKEE D W, SPIRO C L, KOSKY P G, LAMBY E J. Catalysis of coal char gasification by alkali metal salts[J]. Fuel,1983,62(2):217−220. doi: 10.1016/0016-2361(83)90202-8
[5]	VERAA M J, BELL A T. Effect of alkali metal catalysts on gasification of coal char[J]. Fuel,1978,57(4):194−200. doi: 10.1016/0016-2361(78)90116-3
[6]	KAPTEIJN F, PEER O, MOULIJN J A. Kinetics of the alkali carbonate catalyzed gasification of carbon: 1. CO₂ gasification[J]. Fuel,1986,65(10):1371−1376. doi: 10.1016/0016-2361(86)90107-9
[7]	TROMP P J J, KARSTEN P J A, JENKIN R G, MOULIJN J A. The thermoplasticity of coal and the effect of K₂CO₃ addition in relation to the reactivity of the char in gasification[J]. Fuel,1986,65(10):1450−1456. doi: 10.1016/0016-2361(86)90122-5
[8]	YUAN X Z, FAN S M, ZHAO L, KIM H T. Investigations of both catalytic steam gasification of indonesian lanna coal and potassium catalyst recovery using K₂CO₃ as a catalyst[J]. Energy Fuels,2016,30(3):2492−502. doi: 10.1021/acs.energyfuels.5b02536
[9]	YUAN X Z, FAN S M, CHOI S W, KIM H T, LEE K B. Potassium catalyst recovery process and performance evaluation of the recovered catalyst in the K₂CO₃-catalyzed steam gasification system[J]. Appl Energy,2017,195:850−60. doi: 10.1016/j.apenergy.2017.03.088
[10]	WANG Y W, WANG Z Q, HUANG J J, FANG Y T. Improved catalyst recovery combined with extracting alumina from Na₂CO₃-catalyzed gasification ash of a high-aluminum coal char[J]. Fuel,2018,234(15):101−109.
[11]	KUANG J P, ZHOU J H, ZHOU Z J, LIU J Z, CEN K F. Catalytic mechanism of sodium compounds in black liquor during gasification of coal black liquor slurry[J]. Energy Convers Manage,2008,49(2):247−256. doi: 10.1016/j.enconman.2007.06.032
[12]	林驹, 张济宇, 钟雪晴. 纸浆黑液对福建无烟煤水蒸气催化气化的动力学和补偿效应[J]. 化工学报,2009,60(4):905−911. doi: 10.3321/j.issn:0438-1157.2009.04.014 LIN Ju, ZHANG Ji-yu, ZHONG Xue-qing. Kinetics and compensation effects of steam gasification of Fujian anthracite using black liquor as catalyst[J]. CIESC J,2009,60(4):905−911. doi: 10.3321/j.issn:0438-1157.2009.04.014
[13]	黄文沂, 张济宇, 林驹. 无烟粉煤催化气化含碱灰渣的煅烧无害化[J]. 燃料化学学报,2001,29(6):537−542. doi: 10.3969/j.issn.0253-2409.2001.06.013 HUANG Wen-yi, ZHANG Ji-yu, LIN Ju. Harmless treatment of alkali ash-cinders yielded in catalytic gasification for pulverized Fujian anthracite[J]. J Fuel Chem Technol,2001,29(6):537−542. doi: 10.3969/j.issn.0253-2409.2001.06.013
[14]	VALENZUELA-CALAHORRO C, PAN Y G, BERNAITE-GARCIA A, GOMEZ-SERRANO V. Thermogravimetric study of anthracite gasification in CO₂ catalyzed by black liquor[J]. Energy Fuels,1994,8(2):348−354. doi: 10.1021/ef00044a009
[15]	ZHAN X L, ZHOU Z J, WANG F C. Catalytic effect of black liquor on the gasification reactivity of petroleum coke[J]. Appl Energy,2010,87(5):1710−1715. doi: 10.1016/j.apenergy.2009.10.027
[16]	周志杰, 熊杰, 展秀丽, 于广锁. 造纸黑液对石油焦-CO₂气化的催化作用及动力学补偿效应[J]. 化工学报,2011,62(4):934−939. ZHOU Zhi-jie, XIONG Jie, ZHAN Xiu-li, YU Guang-suo. Catalysis of black liquor for petroleum coke-CO₂ gasification and kinetic compensation effect[J]. CIESC J,2011,62(4):934−939.
[17]	WANG J, SAKANISHI K, SAITO I. High-yield hydrogen production by steam gasification of hypercoal (Ash-free coal extract) with potassium carbonate: Comparison with raw coal[J]. Energy Fuels,2005,19:2114−2120. doi: 10.1021/ef040089k
[18]	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. doi: 10.1016/j.fuel.2009.09.001
[19]	ZHANG L X, KUDO S, TSUBOUCHHI N, HAYASHI, J I, OHTSUKA Y, NORINAGA K. Catalytic effects of Na and Ca from inexpensive materials on in-situ steam gasification of char from rapid pyrolysis of low rank coal in a drop-tube reactor[J]. Fuel Process Technol,2013,113:1−7.
[20]	DING L, ZHOU Z J. Catalytic effects of Na₂CO₃ additive on coal pyrolysis and gasification[J]. Fuel,2015,142:134−144. doi: 10.1016/j.fuel.2014.11.010
[21]	YEBOAHA Y D, XU Y, SHETH A, GODAVARTY A, AGRAWAL P K. Catalytic gasification of coal using eutectic salts: identification of eutectics[J]. Carbon,2003,41(2):203−214. doi: 10.1016/S0008-6223(02)00310-X
[22]	KAPTEIJN F, MOULIJN J A. Methanation of CO over alkali metal-carbon catalysts[J]. Chem Commun,1984,5:278−279.
[23]	MEIJER R, VAN DOORN R, KAPTEIJN F, MOULIJN J A. Methane formation in H₂, CO mixtures over carbon-supported potassium carbonate[J]. J Catal,1992,134(2):525−535. doi: 10.1016/0021-9517(92)90339-J
[24]	WANG J, JIANG M Q, YAO Y H, ZHANG Y M, CAO J Q. Steam gasification of coal char catalyzed by K₂CO₃ for enhanced production of hydrogen without formation of methane[J]. Fuel,2009,88(9):1572−1579.
[25]	陈彦, 张济宇. 福建无烟煤Na₂CO₃催化气化过程的比表面变化特性[J]. 化工学报,2012,63(8):2443−2452. doi: 10.3969/j.issn.0438-1157.2012.08.016 CHEN Yan, ZHANG Ji-yu. Variation of specific surface area in catalytic gasification process of Fujian anracite with Na₂CO₃ catalyst[J]. CIESC J,2012,63(8):2443−2452. doi: 10.3969/j.issn.0438-1157.2012.08.016
[26]	孟磊, 周敏, 王芬. 煤催化气化催化剂研究进展[J]. 煤气与热力,2010,30(4):B18−B22. MENG Lei, ZHOU Min, WANG Fen. Progress of research on catalyst for catalytic gasification of coal[J]. Gas Heat,2010,30(4):B18−B22.