Experimental Study on Regeneration process of NiMo/γ-Al2O3 Catalyst in Hydro-processing through Supercritical Carbon Dioxide Fluid Technology

Abstract

Catalyst regeneration technology plays an important role in the chemical industry also the hydro-processed application in this study Considering the effects of activation and economics the regeneration process is inevitable and important This research study on a rising and promising regeneration technology “supercritical carbon dioxide extraction technology” Based on the experimental results the solvent capacity of carbon dioxide in the near-critical zone the categories/concentration of co-solvents and the way of operation have been investigated for the effect of regeneration The best mass removal rate of catalyst which means the best regeneration catalyst was obtained under the optimal reaction conditions of using batch operation 76 bar 523 K 10 ml/per period Hexane as co-solvent 1 5 hours each cycle and 2 or 3 cycles were recommended The best mass removal rate of 15 46% of NiMo/γ-Al2O3 catalyst which means the best regeneration catalyst was obtained under the optimal reaction conditions of using batch operation 76 bar 523 K 10 ml/per period Hexane as co-solvent 1 5 hours each cycle and 2 or 3 cycles were recommended The characteristics of regenerated catalyst were tested and analyzed by XRD TGA Py-FTIR and Nitrogen adsorption/desorption isotherm In addition with the existing hydro-processed system the difference and mechanism of hydro-processed renewable diesel produced from fresh deactivated and regenerated catalysts was studied The conversion rate of oil products and the trend of composition changes with reaction time were compared by GC-MS/FID

Date of Award	2020
Original language	English
Supervisor	Wei-Cheng Wang (Supervisor)