TY - JOUR
T1 - The production of hydroprocessed renewable diesel with a catalyst regenerated using supercritical carbon dioxide (SCCO2)
AU - Lee, Cheng Pao
AU - Wang, Wei Cheng
N1 - Funding Information:
This project was supported by the Ministry of Science and Technology, Taiwan , through grant 108-2221-E-006 -220-MY3 .
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/5/1
Y1 - 2022/5/1
N2 - Hydroprocessed renewable diesel was produced using a hydro-treatment technology that is mainly dependent on the feedstock quality and catalyst performance. In this study, the regeneration of NiMo/γ-Al2O3 hydroprocessing catalyst was investigated with continuous and batch operations for the purpose of recovering waste catalyst and improving catalyst performance. Supercritical carbon dioxide and co-solvent were utilized to perform the regeneration process, and the process parameters were discussed. Furthermore, the regenerated catalyst was characterized using TGA, FTIR, BET, and XRD methods and compared to both fresh and spent catalysts. It was found that the optimal regeneration for catalyst could be obtained using a batch mode at the pressure of 76 bar and the temperature of 523 K with injecting 10 mL per period hexane co-solvent for 3 periods, resulting in 15.5% of mass removal rate. The regenerated catalyst possessed >97% conversion while the fresh one obtained >99%.
AB - Hydroprocessed renewable diesel was produced using a hydro-treatment technology that is mainly dependent on the feedstock quality and catalyst performance. In this study, the regeneration of NiMo/γ-Al2O3 hydroprocessing catalyst was investigated with continuous and batch operations for the purpose of recovering waste catalyst and improving catalyst performance. Supercritical carbon dioxide and co-solvent were utilized to perform the regeneration process, and the process parameters were discussed. Furthermore, the regenerated catalyst was characterized using TGA, FTIR, BET, and XRD methods and compared to both fresh and spent catalysts. It was found that the optimal regeneration for catalyst could be obtained using a batch mode at the pressure of 76 bar and the temperature of 523 K with injecting 10 mL per period hexane co-solvent for 3 periods, resulting in 15.5% of mass removal rate. The regenerated catalyst possessed >97% conversion while the fresh one obtained >99%.
UR - http://www.scopus.com/inward/record.url?scp=85124272475&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85124272475&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2022.123402
DO - 10.1016/j.energy.2022.123402
M3 - Article
AN - SCOPUS:85124272475
SN - 0360-5442
VL - 246
JO - Energy
JF - Energy
M1 - 123402
ER -