Effect of Support Material on MgO-Based Catalyst for Production of New Hydrocarbon Bio-Diesel

The catalytic-decarboxylation of waste cooking oil was carried out over 10wt% MgO catalysts supported on different supports, g-Al 2 O 3 , ZrO 2 , SiO 2 and active carbon. The prepared catalysts were characterized by BET, XRD, FE-SEM and TGA. The results of XRD and BET indicated that the obtained catalysts were highly dispersion on the support with large specific surface area. The catalytic-decarboxylation performance of catalysts was investigated by the CO 2 yield and carried out in an agitated reactor under inert gas for 7 h at 430 °C. The triglycerides in waste cooking oil were converted into a mixture of hydrocarbons, CO, CO 2 and water by breaking C-C and C-O bonds by direct decarboxylation and subsequent cracking. The supported MgO-based catalysts showed high catalytic activity and could convert triglycerides to long chain hydrocarbons in diesel specification range (C 10 -C 20 ). In the case of 10M/AC catalyst, the addition of ZrO 2 exhibited an inhibitor the coke formation on the catalyst surface, due to surface oxygen vacancies, which help gasify the carbon that deposit on the surface of the catalyst.

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