Effect of modification ZSM-5 catalyst in upgrading quality of organic liquid product derived from catalytic cracking of Indonesian nyamplung oil (Calophyllum inophyllum)

Abstract

The catalytic cracking of nyamplung oil over ZSM-5 catalyst was investigated in a packed bed reactor at the temperature of 450 °C and ratio of catalysts to oils was 1:5. The results show that ZSM-5 has high selectivity for aromatics compounds but low in the paraffin compounds. This aromatic compound has an advantage in increasing the octane number of gasoline even though it should be limited due to environmental regulation. To upgrade the quality of the organic liquid product is done by modification catalyst. One of the method to modify the catalysts by impregnating metal Ni into ZSM-5 with various % weight of Ni (2-7 wt. %). From BET and BJH analysis shows that the modification Ni/ZSM-5 catalysts affected the surface area and pore volume of catalyst. Compared to catalytic cracking of nyamplung oil with ZSM-5 catalysts, the loading of Ni to ZSM-5 could improve the selectivity of paraffin compounds. Increasing on nickel loaded tends to increase the selectivity of paraffin compounds and decrease the aromatic compounds. But the addition of 2-7 wt. % Ni in the catalyst ZSM-5 has slightly affected the yield of liquid products. The yield of liquid products with catalyst ZSM-5 and Ni ZSM-5 in the range of 70-75%.