Ash composition, structural characteristics and thermal conversion performance of Texaco gasifier based on Zhundong coal

被引：2

作者：

Xu X.-W. ^{[1
]}

Mo W.-L. ^{[1
]}

Hao C.-X. ^{[1
,2
]}

Liu Y.-B. ^{[1
]}

Wei X.-Y. ^{[1
,3
]}

Yang X.-Q. ^{[4
]}

Zhang S.-P. ^{[4
]}

机构：

[1] Key Laboratory of Coal Clean Conversion & Chemical Engineering Process (Xinjiang Uyghur Autonomous Region), College of Chemical Engineer, Xinjiang University, Urumqi

[2] Guoneng Xinjiang Chemical Industry Co, Ltd, Urumqi

[3] Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou

[4] Xinjiang Yihua Chemical Industry Co, Ltd, Changji

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2022年 / 50卷 / 07期

关键词：

coal gasification; Coats-Redfern model; FT-IR; gasification slag; thermogravimetric analysis;

D O I：

10.1016/S1872-5813(21)60187-1

中图分类号：

学科分类号：

摘要：

Composition and structure characteristics of fine slag (FS) and coarse slag (CS) discharged from Texaco gasifier with Zhundong coal as raw material were analyzed, and their thermochemical conversion properties were analyzed. Proximate and ultimate analyses show that the contents of fixed carbon in coarse slag are 42.31%, indicating that it can be used as raw material to realize its high-added utilization. Analysis with Fourier transform infare spectrometer (FT-IR) suggest that the absorption peak of Si−O in coarse slag and fine slag is stronger, and there is a small amount of aromatic structure in fine slag. Thermal decomposition behaviors in inert atmosphere show that the maximum weight loss rate peak of coarse slag is located around 600 ℃, while that of fine slag is transferred to about 620 °C. Results of thermal decomposition in oxidization atmosphere show that there are obvious weight loss rate peaks derived from combustion of the fixed carbon in 500−700 ℃. The weight loss profiles of fine slag and coarse slag in inert and oxidization atmosphere were fitted by Coats-Redfern method. The kinetic parameters including pyrolysis/combustion activation energy and correlation coefficient were calculated. The results show that the fitting effect is better as the reaction order selected as 3 at the intense pyrolysis section (560−640 ℃) for coarse slag in inert atmosphere, with correlation coefficient R2 of 0.99 and activation energy E of 38.85 kJ/mol. Similarly, in the intense pyrolysis stage (590−650 ℃) of fine slag, the fitting effect is better as the reaction order selected 3, with the correlation coefficient R2 of 0.97 and the activation energy E of 79.09 kJ/mol. In oxidization atmosphere, at the intense combustion stage of coarse slag (540−605 ℃) and fine slag (530−605 ℃), the fitting effect is better as n=1 for the both slags, with the activation energy E of 226.46 and 154.73 kJ/mol respectively. © 2022 Science Press. All rights reserved.

引用

页码：777 / 786

页数：9

共 32 条

[1] XU J, YANG Y, LI Y., Recent development in converting coal to clean fuels in China[J], Fuel, 152, (2015)
[2] WANG W D, LIU D H, TU Y N, JIN L Z, WANG H., Enrichment of residual carbon in entrained-flow gasification coal fine slag by ultrasonic flotation[J], Fuel, 278, (2020)
[3] GUO F H, MIAO Z K, GUO Z K, LI J, ZHANG Y X, WU J J., Properties of flotation residual carbon from gasification fine slag[J], Fuel, 267, (2020)
[4] DAI G F, ZHENG S J, WANG X B, BAI Y H, DONG Y S, DU J, SUN X W, TAN H Z., Combustibility analysis of high-carbon fine slags from an entrained flow gasifier[J], J Environ Manage, 271, (2020)
[5] MIAO Z K, WU J J, ZHANG Y X, ZHAO X, GUO F H, GUO Z K, GUO Y., Chemical characterizations of different sized mineral-rich particles in fine slag from Entrained-flow gasification[J], Adv Powder Technol, 31, 9, pp. 3715-3723, (2020)
[6] LI C C, QIAO X C, YU J G., Large surface area MCM-41 prepared from acid leaching residue of coal gasification slag[J], Minerals, 167, (2016)
[7] ZHANG Y X, DONG J X, GUO F H, SHAO Z Y, WU J J., Zeolite synthesized from coal fly ash produced by a gasification process for Ni<sup>2+</sup> removal from water[J], Minerals, 8, 3, (2018)
[8] GUO Y, GUO F H, ZHOU L, GUO Z K, MIAO Z K, LIU H, ZHANG X X, WU J J, ZHANG Y X., Investigation on co-combustion of coal gasification fine slag residual carbon and sawdust char blends: Physiochemical properties, combustion characteristic and kinetic behavior[J], Fuel, 292, (2021)
[9] DU M J, HUANG J J, LIU Z Y, ZHOU X, GOU S, WANG Z Q, FANG Y T., Reaction characteristics and evolution of constituents and structure of a gasification slag during acid treatment[J], Fuel, 224, (2018)
[10] GU Y Y, QIAO X C., A carbon silica composite prepared from water slurry coal gasification slag[J], Microporous Mesoporous Mater, 276, pp. 303-307, (2018)

← 1 2 3 4 →