Migration of sulfur in in-situ gasification chemical looping combustion of Beisu coal with iron- and copper-based oxygen carriers

Luo, Ming1,2; Zhou, Lunzheng1; Cai, Jianjun3,4; Zhang, Haiyan1; Wang, Chao1

2021-07-01

10.1016/j.cjche.2020.09.058

CHINESE JOURNAL OF CHEMICAL ENGINEERING   影响因子和分区

1004-9541

2210-321X

Chemical looping combustion (CLC) is an energy conversion technology with high efficiency and inherent separation of CO2. The existence of sulfur in coal may affect the CO2 purity and the performance of oxygen carrier due to the interactions between sulfur contaminants and oxygen carrier. The migration of sulfur in Beisu coal during the in-situ gasification chemical looping combustion (iG-CLC) process using two oxygen carriers (iron ore and CuO/SiO2) was investigated respectively. The thermodynamic analysis results showed the formation of metal sulfides was thermodynamically favored at low temperatures and low oxygen excess coefficients, while they were obviously inhibited and the production of SO2 was significantly promoted with an increase in temperature and oxygen excess coefficient. Moreover, part of sulfur was captured and fixed in the forms of alkali/alkaline earth metal sulfate due to the high amount of alkali/alkaline earth metal oxides in the coal ash or/and oxygen carrier. The experimental results showed that the sulfur in coal mainly released in the form of SO2, and the sulfur conversion efficiency (X-S) in the reduction stage were 51.04% and 48.24% when using iron ore and CuO/SiO2 respectively. The existence of metal sulfides was observed in the reduced oxygen carriers. The values of X-S in the reoxidation process reached 3.80% and 7.64% when using iron ore and CuO/SiO2 respectively. The residue and accumulation of sulfur were also found on the surfaces of two oxygen carriers. (C) 2020 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.

SO2 Coal Iron ore Copper-based Chemical looping combustion

SCI ; EI

英语

其他

National Natural Science Foundation of China[51606087] ; Start-Up Foundation of Jiangsu University[15JDG157] ; State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering[2020-KF-07]

Engineering

Engineering, Chemical

WOS:000703458000023

CHEMICAL INDUSTRY PRESS CO LTD

20212810614085

Carbon dioxide ; Coal ; Coal ash ; Coal combustion ; Conversion efficiency ; Copper ; Copper oxides ; Gasification ; Iron ore reduction ; Iron ores ; Low temperature production ; Oxygen ; Silicon ; Sulfur ; Sulfur dioxide ; Thermoanalysis

Heavy Metal Mines:504.3 ; Solid Fuels:524 ; Energy Conversion Issues:525.5 ; Ore Treatment:533.1 ; Copper:544.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Chemistry:801 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2

CHEMISTRY

Web of Science

1.Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Jiangsu, Peoples R China
2.Ningxia Univ, State Key Lab High Efficiency Utilizat Coal & Gre, Yinchuan 750021, Ningxia, Peoples R China
3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Key Lab Municipal Solid, Shenzhen 518055, Peoples R China

Luo, Ming,Zhou, Lunzheng,Cai, Jianjun,et al. Migration of sulfur in in-situ gasification chemical looping combustion of Beisu coal with iron- and copper-based oxygen carriers[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2021,35:247-255.

Luo, Ming,Zhou, Lunzheng,Cai, Jianjun,Zhang, Haiyan,&Wang, Chao.(2021).Migration of sulfur in in-situ gasification chemical looping combustion of Beisu coal with iron- and copper-based oxygen carriers.CHINESE JOURNAL OF CHEMICAL ENGINEERING,35,247-255.

Luo, Ming,et al."Migration of sulfur in in-situ gasification chemical looping combustion of Beisu coal with iron- and copper-based oxygen carriers".CHINESE JOURNAL OF CHEMICAL ENGINEERING 35(2021):247-255.