Hydrodeoxygenation of oleic acid and palmitic acid to hydrocarbon-like biofuel over unsupported Ni-Mo and Co-Mo sulfide catalysts

Boonyawan Yoosuk, Paphawee Sanggam, Sakdipat Wiengket and Pattarapan Prasassarakich

Renewable Energy, 2019, vol. 139, issue C, 1391-1399

Abstract: Second generation biodiesel, so-called bio-hydrogenated diesel (BHD), can be produced from hydrotreatment of vegetable oils. The hydrogenation (HDO) of oleic acid and palmitic acid as model compounds of palm oil over unsupported Ni-Mo and Co-Mo sulfide catalysts was performed in a Parr reactor to produce BHD. The effects of reaction parameters: temperature, hydrogen pressure and the atomic ratio of catalysts (Ni/(Ni + Mo) or Co/(Co + Mo)) on the conversion and product yields (mainly n-C15, n-C16, n-C17 and n-C18 hydrocarbons) were evaluated. The results show that the high pressure favored HDO pathway, while high temperature strongly affected the decarboxylation and decarbonylation pathways. At optimal conditions for oleic acid HDO, the efficient catalyst was NiMoS2 catalyst (Ni/(Ni + Mo) = 0.2) which gave high oleic acid conversion (100%), n-C18 selectivity (78.8%) and n-C18 yield (70.3%) whereas, for palmitic acid HDO, NiMoS2 catalyst (Ni/(Ni + Mo) = 0.2) also gave high palmitic acid conversion (95.2%), n-C16 selectivity (78.5%) and n-C16 yield (65.6%).

Keywords: Hydrodeoxygenation; Bio-hydrogenated diesel; Oleic acid; Palmitic acid; Sulfide catalysts (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (10)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:139:y:2019:i:c:p:1391-1399

DOI: 10.1016/j.renene.2019.03.030

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