Environment-friendly deoxygenation of non-edible Ceiba oil to liquid hydrocarbon biofuel: Process parameters and optimization study

Nur Hafawati Abdullah and Nurul Asikin Asikin-Mijan and Yun Hin Taufiq-Yap and Hwai Chyuan Ong and Hwei Voon Lee (2021) Environment-friendly deoxygenation of non-edible Ceiba oil to liquid hydrocarbon biofuel: Process parameters and optimization study. Research Square. pp. 1-17. ISSN 2693-5015

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URL: https://www.researchsquare.com/article/rs-582604/v...

Abstract

Non-edible Ceiba oil has feasibility as a sustainable biofuel resource in tropical countries that act as alternative to a portion of the fossil fuels used today. Catalytic deoxygenation of the Ceiba oil (high O/C ratio) was conducted to produce hydrocarbon biofuel (high H/C ratio)over NiO-CaO5 /SiO2 -Al2O3catalyst with aims of high diesel selectivity and catalyst reusability. In the present study, Box-Behnken experimental design was used to evaluate and optimize liquid hydrocarbon yield by considering following reaction factors: catalyst loading (1-9 wt.%), reaction temperature (300 - 380°C) and reaction time (30 -180 min). It was discovered that the optimum yield for hydrocarbon fractionsn-(C8 – C20 ) was 77% under deoxygenation condition of 5 wt.% catalyst loading, reaction temperature of 340°C within 105 min. Besides, deoxygenationmodel indicated that interaction effects of catalyst loading-reaction time influence the deoxygenation activity greatly. Based on the product analysis, oxygenated species(e.g. CO2 and CO) were removed mainly via decarboxylation/decarbonylation (deCOx) pathways. The NiOCaO5 /SiO2 -Al2O3 catalyst is stable for five consecutive runs with hydrocarbon fractions within range of 66-75% and n-(C15+C17 ) selectivity of 64-72% as well. The stability profile of NiO-CaO5 /SiO2 -Al2O3 catalyst indicated that the catalyst able to maintain deoxygenation reactivity throughout five cycles with hydrocarbon yield of 66-75% and n-(C15+C17) selectivity of 64–72 %. However, coke deposition was noticed for the spent catalyst after several times of usage, which due to the high reaction temperature above 300oC.

Item Type:	Article
Keyword:	C8-C20 Hydrocarbon , Free Fatty Acid , Green Diesel , RSM , Alternative Fuel , Catalyst
Subjects:	T Technology > TP Chemical technology > TP1-1185 Chemical technology > TP315-360 Fuel
Department:	FACULTY > Faculty of Science and Natural Resources
Depositing User:	SAFRUDIN BIN DARUN -
Date Deposited:	20 Jan 2022 08:11
Last Modified:	20 Jan 2022 08:11
URI:	https://eprints.ums.edu.my/id/eprint/31625

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