No abstract

In this study, the catalytic performance of bimetallic NiW modified ZSM‐5 catalysts for hydrocracking conversion of crude palm oil is presented. Crystalline ZSM‐5 zeolites with precisely controlled SiO2/Al2O3 ratios (SARs) of 30, 50, 70 and 100 were successfully synthesized from kaolin via the hydrothermal method. To enhance their catalytic activity, as‐prepared zeolites were modified with Ni, W and NiW by the impregnation technique. The catalysts were characterized by various techniques. The total amount of Ni and W in the catalysts was determined by inductively coupled plasma atomic emission spectroscopy technique and found to be in the range of 3.08–3.16 and 5.88–6.39 wt%, respectively. These NiW‐ZSM‐5 catalysts showed good activity for the production of biofuels, and their catalytic activity decreased in the order NiW‐ZSM‐5 > Ni‐ZSM‐5 > W‐ZSM‐5 > ZSM‐5. The incorporation of NiW improved the production of both hydrogenation and dehydrogenation hydrocarbon compounds. Moreover, the different SARs in ZSM‐5 zeolite also affected the catalytic activity and NiW‐ZSM‐5 with SAR of 50 gave an excellent conversion (96.20%). Additionally, the types of the obtained hydrocarbon products were identified as gasoline (C5–C10), kerosene (C9–C11) and diesel (C10–C20) by simulated distillation gas chromatography‐flame ionization detector and gas chromatography–mass spectrometry. © 2016 Curtin University of Technology and John Wiley & Sons, Ltd. © 2016 Curtin University of Technology and John Wiley & Sons, Ltd.

To produce high yield and quality hydrocarbon biofuel, HZSM-5 zeolite loaded with different Zn concentrations (5, 10, 15 and 20wt.%) was used to palm oil cracking in batch reactor. Reaction temperature and reaction time were optimized. The products contained liquid hydrocarbon biofuel, distillation residual and coke. The physical properties of biofuel products were determined. The results presented that 15% Zn/HZSM-5 exhibited higher hydrocarbon biofuel yield (20.27%) and their excellent product properties with higher heating value (HHV), low viscosity and moisture content. A highest hydrocarbon biofuel yield and good alkane range hydrocarbons distribution from palm oil were obtained under reaction temperature of 420°C for 5 hours.