Effect of potassium carbonate on coal ash sintering and mineral transformation in H2O-H2-CO-CO2 atmosphere

LI Peng-fei; QU Xuan; ZHANG Rong; BI Ji-cheng

Volume 48 Issue 9

Sep. 2020

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Article Navigation > Journal of Fuel Chemistry and Technology > 2020 > 48(9): 1047-1054

LI Peng-fei, QU Xuan, ZHANG Rong, BI Ji-cheng. Effect of potassium carbonate on coal ash sintering and mineral transformation in H2O-H2-CO-CO2 atmosphere[J]. Journal of Fuel Chemistry and Technology, 2020, 48(9): 1047-1054.

Citation:

LI Peng-fei, QU Xuan, ZHANG Rong, BI Ji-cheng. Effect of potassium carbonate on coal ash sintering and mineral transformation in H₂O-H₂-CO-CO₂ atmosphere[J]. Journal of Fuel Chemistry and Technology, 2020, 48(9): 1047-1054.

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Effect of potassium carbonate on coal ash sintering and mineral transformation in H₂O-H₂-CO-CO₂ atmosphere

LI Peng-fei^{1, 2},
QU Xuan¹,
ZHANG Rong^{1
,
,},
BI Ji-cheng¹

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

Funds:

The project was supported by National Natural Science Foundation of China 21576275

NSFC-Xinjiang joint fund U1703253

More Information

Corresponding author: ZHANG Rong,Tel: 0351-4151519, E-mail:zrbd@sxicc.ac.cn
Received Date: 2020-08-01
Rev Recd Date: 2020-08-28

Available Online: 2021-01-23

Publish Date: 2020-09-10

Abstract

Abstract

The influence of reaction pressure on the sintering temperature of potassium carbonate loaded coal ash was investigated in H₂O-H₂-CO-CO₂ atmosphere. An empirical equation for sintering temperature calculation was derived based on the content of ash, the ash composition, the catalyst loading and the reaction pressure. The deviation between the calculated value and the experimental value was within ±15 ℃ (2%). The transformation of two coal ashes was investigated by X-ray diffractometer and thermodynamic calculation. It was found that potassium carbonate could react with anhydrite and calcite in coal to produce potassium sulfate and butschliite. The potassium sulfate and hematite could be reduced in the H₂O-H₂-CO-CO₂ atmosphere, and the decomposition temperature of butschliite increased with the increase of pressure. Moreover, the content of potassium hydroxide in the potassium loaded coal ash increased with the increase of temperature and pressure. The minimum sintering temperatures of coal ash under different pressures were related to the content of potassium hydroxide; when the contents of potassium hydroxide in ashes reached to a certain value, the calculated minimum sintering temperature was very close to the experimental one under different pressures.
- catalytic gasification,
- potassium carbonate,
- sintering temperature prediction,
- mineral transformation

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References(23)

References

[1]	HIRSCH R L, GALLAGHER J E Jr, LESSARD R R, WESSELHOFT R D. Catalytic coal gasification:An emerging technology[J]. Science, 1982, 215(4529):121-127. doi: 10.1126/science.215.4529.121
[2]	VERAA M J, BELL A T. Effect of alkali metal catalysts on gasification of coal char[J]. Fuel, 1978, 57(4):194-200. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=pb/wz2UjXR1yvtiMN5cRB2833OngiCvi/EuU/jYJJs0=
[3]	YEBOAH 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.
[4]	樊利霞, 李克忠, 张荣, 毕继诚.负载碳酸钾煤焦上CO甲烷化反应的研究[J].燃料化学学报, 2014, 42(9):1047-1052. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=rlhxxb201409004 FAN Li-xia, LI Ke-zhong, ZHANG Rong, BI Ji-cheng. Methanation of CO over coal char loaded with K₂CO₃[J]. J Fuel Chem Technol, 2014, 42(9):1047-1052. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=rlhxxb201409004
[5]	李伟伟, 李克忠, 康守国, 郑岩, 张荣, 毕继诚.煤催化气化中非均相反应动力学的研究[J].燃料化学学报, 2014, 42(3):290-296. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=rlhxxb201403006 LI Wei-wei, LI Ke-zhong, KANG Shou-guo, ZHENG Yan, ZHANG Rong, BI Ji-cheng. Heterogeneous reaction kinetics of catalytic coal gasification[J]. J Fuel Chem Technol, 2014, 42(3):290-296. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=rlhxxb201403006
[6]	毛燕东, 金亚丹, 李克忠, 毕继诚, 李金来, 辛峰.煤催化气化工艺中内蒙王家塔烟煤灰烧结温度的影响因素分析[J].化工学报, 2015, 66(3):1080-1087. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hgxb2015030031 MAO Yan-dong, JIN Ya-dan, LI Ke-zhong, BI Ji-cheng, LI Jin-lai. XIN Feng. Analysis of influencing factors on sintering temperature of Inner Mongolia Wangjiata bituminous coal ash during catalytic coal gasification[J]. CIESC J, 2015, 66(3):1080-1087. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hgxb2015030031
[7]	毛燕东, 金亚丹, 李克忠, 毕继诚, 李金来, 辛峰.煤催化气化条件下不同煤种煤灰烧结行为研究[J].燃料化学学报, 2015, 43(4):402-409. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=rlhxxb201504004 MAO Yan-dong, JIN Ya-dan, LI Ke-zhong, BI Ji-cheng, LI Jin-lai, XIN Feng. Sintering behavior of different coal ashes in catalytic coal gasification process[J]. J Fuel Chem Technol, 2015, 43(4):402-409. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=rlhxxb201504004
[8]	沙兴中, 杨南星.煤的气化与应用[M].上海:华东理工大学出版社, 1995. SHA Xing-zhong, YANG Nan-xing. Coal Gasification and Its Application[M]. Shanghai:East China University of Science and Technology Press, 1995.
[9]	芦涛.催化气化结渣及钾迁移特性的基础研究[D].太原: 中国科学院山西煤炭化学研究所, 2015. http://d.wanfangdata.com.cn/thesis/Y2956501 LU Tao. Fundamental research on agglomeration and potassium migration characteristics during catalytic coal gasification[D]. Taiyuan: Institute of Coal Chemistry, Chinese Academy of Sciences, 2015. http://d.wanfangdata.com.cn/thesis/Y2956501
[10]	王勤辉, 揭涛, 李小敏, 骆仲泱, 景妮洁, 岑可法.反应气氛对不同煤灰烧结温度影响的研究[J].燃料化学学报, 2010, 38(1):17-22. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=rlhxxb201001004 WANG Qin-hui, JIE Tao, LI Xiao-min, LUO Zhong-yang, JING Ni-jie, CEN Ke-fa. Experiments of the effects of reaction atmosphere on the coal ash sintering temperature[J]. J Fuel Chem Technol, 2010, 38(1):17-22. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=rlhxxb201001004
[11]	李风海, 黄戒介, 房倚天, 王洋.小龙潭褐煤灰烧结温度影响因素的研究[J].洁净煤技术, 2011, 17(3):57-60. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jjmjs201103018 LI Feng-hai, HUANG Jie-jie, FANG Yi-tian, WANG Yang. Research on the influencing factors of sintering temperature of Xiaolongtan lignite ashes[J]. Clean Coal Technol, 2011, 17(3):57-60. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=jjmjs201103018
[12]	王勤辉, 景妮洁, 骆仲泱, 李小敏, 揭涛.灰成分影响煤灰烧结温度的实验研究[J].煤炭学报, 2010, 35(6):1015-1020. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=mtxb201006028 WANG Qin-hui, JING Ni-jie, LUO Zhong-yang, LI Xiao-min, JIE Tao. Experiments on the effect of chemical components of coal ash on the sintering temperature[J]. J China Coal Soc, 2010, 35(6):1015-1020. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=mtxb201006028
[13]	HU H W, ZHOU K, MENG K S, SONG L B, LIN Q Z. Effects of SiO₂/Al₂O₃ ratios on sintering characteristics of synthetic coal ash[J]. Energies, 2017, 10(2):242. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=MDPI000000198789
[14]	CHENG X L, WANG Y G, LIN X C, BI J C, ZHANG R, BAI L. Effects of SiO₂-Al₂O₃-CaO/FeO low-temperature eutectics on slagging characteristics of coal ash[J]. Energy Fuels, 2017, 31(7):6748-6757. doi: 10.1021/acs.energyfuels.7b00535
[15]	LU T, LI K Z, ZHANG R, BI J C. Addition of ash to prevent agglomeration during catalytic coal gasification in a pressurized fluidize bed[J]. Fuel Process Technol, 2015, 134:414-423. doi: 10.1016/j.fuproc.2015.02.024
[16]	WANG L, HUSTAD J E, GRONLI M. Sintering characteristics and mineral transformation behaviors of corn cob ashes[J]. Energy Fuels, 2012, 26(9):5905-5916. doi: 10.1021/ef300215x
[17]	JING N J, WANG Q H, CHENG L M, LUO Z Y, CEN K F. The sintering behavior of coal ash under pressurized conditions[J]. Fuel, 2013, 103:87-93. doi: 10.1016/j.fuel.2011.09.025
[18]	JING N J, WANG Q H, LUO Z Y, CEN K F. Effect of chemical composition on sintering behavior of Jincheng coal ash under gasification atmosphere[J]. Chem Eng Commun, 2012, 199(2):189-202. doi: 10.1080/00986445.2011.582531
[19]	郑绍聪, 宁平, 马丽萍, 杜亚雷, 张伟, 牛学奎.不同气氛下磷石膏热分解的反应特性[J].武汉理工大学学报(交通科学与工程版), 2010, 34(3):580-583. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=whjtkjdxxb201003038 ZHENG Shao-cong, NING Ping, MA Li-ping, DU Ya-lei, ZHANG Wei, NIU Xue-kui. Reaction properties of thermal decomposition of phosphogypsum in different atmospheres[J]. J Wuhan Univ Technol (Transp Sci Eng), 2010, 34(3):580-583. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=whjtkjdxxb201003038
[20]	陈升, 刘少文.氢气还原分解硫酸钙的热力学研究[J].化学工业与工程技术, 2012, 33(5):7-11. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hxgyygcjs201205002 CHEN Sheng, LIU Shao-wen. Thermodynamic study on reductive decomposition of calcium sulfate with hydrogen[J]. J Chem Ind Eng, 2012, 33(5):7-11. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hxgyygcjs201205002
[21]	ENNACIRI Y, EL ALAOUI-BELGHITI H, BETTACH M. Comparative study of K₂SO₄ production by wet conversion from phosphogypsum and synthetic gypsum[J]. J Mater Res Technol, 2019, 8(3):2586-2596. http://www.sciencedirect.com/science/article/pii/S2238785418306446
[22]	AREFIEV A V, PODBORODNIKOV I V, SHATSKIY A F, LITASOV K D. Synthesis and Raman spectra of K-Ca double carbonates:K₂Ca(CO₃)₂ butschliite, fairchildite, and K₂Ca₂(CO₃)₃ at 1 atm[J]. Geochem Int, 2019, 57(9):981-987. doi: 10.1134/S0016702919090039
[23]	ARCEO H B, GLASSER F P. Fluxing reactions of sulfates and carbonates in cement clinkering II. The system CaCO₃-K₂CO₃[J]. Cement Concrete Res, 1995, 25(2):339-344. http://www.sciencedirect.com/science/article/pii/0008884695000194