The CAtalytic upgrading PRocess In-situ (CAPRI) incorporated with Toe-to-Heel Air Injection (THAI) for the recovery and in situ upgrading of heavy oils, was investigated at the laboratory-scale simulated on a fixed-bed reactor configuration at a temperature 425 ºC, pressure 20 bar, oil flow rate 1mL min-1and gas (nitrogen)flow rate 500mL min -1 .The cost of catalyst and its rapid deactivation with the possibility of in situ regeneration very difficult has steered investigation into the use of

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... eap catalyst. In this study, refinery regenerated CoMo/Alumina catalyst was investigated for use in CAPRI and evaluated against its fresh counterpart. The level of upgrading was evaluated in terms of API gravity, viscosity reduction and true boiling point (TBP) distribution characteristics of the upgraded oil samples. Despite the regenerated CoMo/Alumina catalyst had experienced weakened acid sites due to partial surface coverage and pore plugging after its use in the refinery; it could achieve almost same level of upgrading as the fresh counterpart.