Synthesis of Renewable Diesel from Palm Oil and Jatropha Curcas Oil through Hydrodeoxygenation using NiMo/Zal

Abstract

Hydrodeoxygenation of palm oil and Jatropha curcas oil over NiMo/ZAL (nickel molybdenum/zeolit alam Lampung) catalyst was investigated under temperatures of 375°C and 400°C and H 2 pressure of 15 bar in a semibatch stirred autoclave reactor. NiMo/ZAL catalyst was prepared using a rapid cooling method. NiMo/ZAL characterization revealed a crystal size of 70.07 nm, surface area of 12.25 m 2 /g, and pore size and pore volume of 9.83 Å and 0.0062 cm 3 /g, respectively. The hydrodeoxygenation removal pathway of palm oil and Jatropha curcas oil over NiMo/ZAL catalyst was primarily achieved through decarboxylation. Under hydrogen pressure of 15 bar and temperature of 375°C, palm oil and Jatropha curcas oil can be converted into paraffin chains (from n-C 15 up to n-C 18) by a decarboxylation reaction that produces water, methane, and CO x gases as byproducts and contains some undesirable reactions. These byproducts can produce alkene bonds that form chains different from those in conventional diesel fuel. The conversion was 80.87%, selectivity was 52.78%, and yield was 45.66%. The hydrodeoxygenation reaction catalyzed by NiMo/ZAL catalyst was found to be suitable for removing oxygen and producing paraffin chains; this increased the heating value and stability of renewable diesel fuel.

Hydrodeoxygenation of Vegetable Oil in a Trickle Bed Reactor for Renewable Diesel Production

“…The SEM-EDS results showed that the NiMo/Al2O3 catalyst had a composition of 6.13% w/w Ni, 12.49% w/w Mo, and 81.33% w/w Al2O3. This showed that the reactive site for this catalyst was molybdenum, which has proven to be effective for hydrodeoxygenation, thus, producing C18 (Susanto et al, 2016). Nickel is effective for decarboxylation and decarbonylation, which produce C17.…”

Sythesis of bioavture through hydrodeoxygenation and catalytic cracking from oleic acid using NiMo/Zeolit catalyst

“…The decrease of viscosity caused by the breaking of carboxylic bond from the waste cooking oil containing carbonyl (CO) and hydroxyl (-OH). The presence of a hydroxyl group on a carboxylic bond may form a hydrogen bond with a carbonyl group that causes the bonding between molecules become stronger and higher viscosity value [8].…”

Heterogeneous Catalyst based on Nickel Modified into Indonesian Natural Zeolite in Green Diesel Production from Crude Palm Oil

“…Kaewmeesri et al (2015) reported Ni/γ-Al2O3 catalysts for the methyl palmitate HDO reaction with a conversion of 60% and alkane C10-C12 selectivity of 58%. Research conducted by Ma and Zhao (2015) using nickel-metal nanoparticles embedded in Hierarchica Beta Zeolite (HBEA) zeolite catalyst showed the total yields of n-octadecane (C18) kept stable at 70 wt% after one h. By using palm oil as feedstocks, Susanto et al (2016) tested NiMo/ZAL (Clinoptilolite type) catalyst for hydrodeoxygenation reaction under hydrogen pressure of 15 bar and temperature of 375°C. The result showed that the renewable diesel yield (C13-C19) produced a conversion of around 80.87% and selectivity of 52.78%.…”