Citation: SUN Yu-dong, WANG Xue, WEI Cheng, ZHAO Xiao-ning. Research for structure and composition of coke on spent commercial residue hydrotreating catalysts along HDM bed[J]. Journal of Fuel Chemistry and Technology, ;2019, 47(2): 167-173. shu

Research for structure and composition of coke on spent commercial residue hydrotreating catalysts along HDM bed

College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China

Corresponding author: SUN Yu-dong, ydsun@upc.edu.cn
Received Date: 29 September 2018
Revised Date: 16 December 2018

Fund Project: The project was supported by the National Natural Science Foundation of China (21376266)the National Natural Science Foundation of China 21376266

Figures(6)

The spent residue hydrotreating catalysts were taken out from the different HDM bed axial position of a fixed-bed residue hydrotreating reactor of Petro-China. The coke on spent catalysts were studied by the technologies such as EA, TG, XPS, FT-IR and ¹³C NMR to get the structure characteristics and parameters. The results showed that the coke on spent residue hydrotreating catalysts located on different beds positions share some characteristics such as the kind of coke, the functional group, but the structure and composition were different from each other. Based on the result of each characterization technique, chemical structure models of coke were established. In order to ensure the accuracy of the structures, a software called gNMR helped to calculate the chemical shifts and predict the NMR spectra of the structure models. The model structures can be corrected to match the experimental results through comparing experimental spectra and the predicted ones.
- residue hydrotreating catalysts,
- coke,
- ¹³C NMR,
- chemical structure model,
- gNMR
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