Insights into multi-stage mild co-carbonization of different fluidized catalytic cracking slurry oil narrow fractions

ABSTRACT

Multi-stage mild co-carbonization of different fluidized catalytic cracking slurry oil narrow fractions was investigated. The characteristics of cokes derived from mild co-carbonization were found to be better than those from rapid co-carbonization. The improvement in quality of cokes derived from mild co-carbonization was reflected in every stage compared to carbonization of a single fraction. Further study revealed that transferable hydrogens can be released at every stage of mild carbonization and that more transferable hydrogens can be released from combined fraction (from 10.7 mg/g to 2.7 mg/g) than a single fraction (from 10.6 mg/g to 2.9 mg/g). These transferable hydrogens can stabilize the carbonization system, thus leading to better carbonization performance of combined narrow fractions.

KEYWORDS:

• slurry oil
• co-carbonization
• hydrogen transfer
• needle coke
• narrow fraction

Acknowledgements

This work was supported by the National Natural Science Foundation of China (21961160741), the Guangdong Basic and Applied Basic Research Foundation (2020A1515110552, 2020A1515110729, 2021A1515010278, 2022A1515011712), Maoming Science and Technology Special Fund Project (2022S044), the Guangdong Provincial Characteristic Innovation Projects of Universities (2022KTSCX086, 2018KTSCX149), State Key Laboratory of Heavy Oil Processing (SKLHOP202301003), the Projects of Talents Recruitment of GDUPT (2019rc001), and the Projects of PhDs’ Start-up Research of GDUPT (2020bs002).

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Cunhui Lin

Cunhui Lin is a Lecturer at the College of Chemical Engineering of Guangdong University of Petrochemical Technology. He has published more than 20 articles in the field of petrochemical engineering.

Kunyuan Zheng

Kunyuan Zheng is a Student at the College of Chemical Engineering of Guangdong University of Petrochemical Technology. He has published one article in the field of college physics competition.

Linhai Duan

Linhai Duan is a Professor at the College of Chemical Engineering of Guangdong University of Petrochemical Technology. He has published more than 50 articles in the field of petrochemical engineering.

Xingye Zeng

Xingye Zeng is a Senior Experimentalist at the College of Chemical Engineering of Guangdong University of Petrochemical Technology. He has published more than 20 articles in the field of petrochemical engineering.

Shufeng Shan

Shufeng Shan is a Lecturer at the College of Chemical Engineering of Guangdong University of Petrochemical Technology. He has published more than 20 articles in the field of petrochemical engineering.

Yingqiu Zhao

Yingqiu Zhao is a Research Assistant at the College of Chemical Engineering of Guangdong University of Petrochemical Technology. She has published one article in the field of petrochemical engineering.