Catalytic supercritical water gasification of oily sludge with the FeOOH/AC for hydrogen production

Along with the continuous increase of crude oil consumption in China, the production of oily sludge is increasing. The traditional oily sludge treatment technology cannot realize the purpose of green and efficient resource utilization of oily sludge. Supercritical water gasification hydrogen technology can efficiently convert oily sludge into hydrogen and realize the resource utilization of oily sludge. However, the traditional supercritical water gasification process requires high energy consumption. It is necessary to study the catalysts in the gasification process. Loaded catalysts have a large specific surface area and can effectively reduce the reaction activation energy. This paper investigated the effects of different catalyst types and concentrations on gasification. The results showed that adding FeOOH/AC effectively increased hydrogen production, and the best catalytic effect was achieved when the FeOOH loading was 10 wt%. The catalyst concentration was 5%, with a hydrogen production rate of 4.638 mol/kg. It was found that the activation energy of the reaction with the addition of the catalyst was reduced by 8.61 kJ/mol compared to that without the catalyst through kinetic analysis. 8.61 kJ/mol.