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Chemoselective decarboxylation of ceiba oil to diesel-range alkanes over a red mud based catalyst under H₂-free conditions.

ABSTRACT: Concerns over global greenhouse gas emissions such as CO _x and NO _x as well as the depletion of petroleum fossil resources have motivated humankind to seek an alternative energy source known as green diesel. In this study, green diesel was produced via a deoxygenation (DO) reaction of ceiba oil under a H₂-free atmosphere over Ni modified red mud-based catalysts, which have been synthesized via a precipitation - deep-deposition assisted autoclave method. The obtained catalyst was further characterized by XRF, XRD, BET, FTIR, TPD-NH₃, FESEM, and TGA. Based on the catalytic activity test, all Ni/RMO _x catalysts facilitated greater DO activity by yielding 83-86% hydrocarbon yield and 70-85% saturated diesel n-(C₁₅ + C₁₇) selectivity. Ni/RMO₃ was the best catalyst for deoxygenizing the ceiba oil owing to the existence of a high acidic strength (12717.3 μmol g^-1) and synergistic interaction between Fe-O and Ni-O species, thereby producing the highest hydrocarbon yield (86%) and n-(C₁₅ + C₁₇) selectivity (85%). According to the reusability study, the Ni/RMO₃ could be reused for up to six consecutive runs with hydrocarbon yields ranging from 53% to 83% and n-(C₁₅ + C₁₇) selectivity ranging from 62% to 83%.

SUBMITTER: Adzahar NA

PROVIDER: S-EPMC9175285 | biostudies-literature |

REPOSITORIES: biostudies-literature

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