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Upgrading of Omani heavy oil was studied under aquathermolytic conditions in the presence of amphiphilic catalysts of NiMo, CoMo and their mixture of 1:1wt ratio. The optimum reaction parameters were 300°C, 5wt% water concentration and 2wt% catalyst concentration. For viscosity reduction, the catalyst efficiency follows the trend (CoMo+NiMo)> NiMo>CoMo. The maximum viscosity reduction observed...
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