Citation: LI Na, LI Yang, BAN Yan-peng, SONG Yin-min, ZHOU Hua-cong, ZHI Ke-duan, 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]. Journal of Fuel Chemistry and Technology, ;2016, 44(11): 1297-1303. shu

Analysis of active microstructure during steam gasification of Shengli char catalyzed by calcium component

Department of Chemical Engineering, Inner Mongolia University of Technology, Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resources, Huhhot 010051, China

Corresponding author: LIU Quan-sheng, liuqs@imut.edu.cn
Received Date: 31 May 2016
Revised Date: 10 August 2016

Fund Project: The project was supported by the National Natural Science Foundation of China 21606134The project was supported by the National Natural Science Foundation of China 21566028The project was supported by the National Natural Science Foundation of China 21566029Natural Science Foundation of Inner Mongolia 2015BS0206The project was supported by the National Natural Science Foundation of China 21266017Natural Science Foundation of Inner Mongolia 2016BS0204The project was supported by the National Natural Science Foundation of China 21676149Natural Science Foundation of Inner Mongolia 2014MS0220

Figures(6)

The catalytic effect of calcium component on steam gasification of Shengli lignite char was studied. Demineralized coal samples were loaded with calcium oxide and pyrolyzed at 1 100℃ (Ca-J). Ca-J⁺ was prepared from Ca-J treated by hydrochloric acid. The char samples were characterized by BET, SEM-EDS, XRD, FT-IR and XPS. The steam gasification of the char samples was performed in a micro fixed bed reactor. The possible catalytic active micro structure was discussed and proposed. The results show that carbon conversion and reactivity index of Ca-J and Ca-J⁺ samples during steam gasification were substantially similar, but much higher than those of demineralized char samples (SL⁺-J). Ca (CH₃COO)₂ and Ca-OOR, two calcium species are present in Ca-J⁺ sample determined by XPS. Chemical analysis and SEM-EDS prove that calcium content of Ca-J⁺ decreases by more than 97% than that of Ca-J sample. XRD analysis indicates free inorganic mineral (CaS, CaO) is removed by hydrochloric acid. FT-IR spectra show C=O, C-O peaks present in Ca-J and Ca-J⁺ samples. So it is postulated that "R-O-Ca-O-R'" (R and R' are aliphatic and aromatic structures, respectively) is the catalyst active microstructure during char steam gasification.
- Shengli char,
- steam gasification,
- catalysis of calcium component,
- active microstructure
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