Abstract
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%.
Original language | English |
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Article number | 123402 |
Journal | Energy |
Volume | 246 |
DOIs | |
Publication status | Published - 2022 May 1 |
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Building and Construction
- Modelling and Simulation
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Energy Engineering and Power Technology
- Pollution
- General Energy
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Management, Monitoring, Policy and Law
- Electrical and Electronic Engineering