Journal
CHEMICAL ENGINEERING JOURNAL
Volume 429, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.132206
Keywords
Manganese; Cobalt; Catalyst deactivation; Steady-state rate; Deoxygenation
Categories
Funding
- Research Grant Scheme [FRGS-MRSA/1/2019/STG01/UPM/01/30, UPM.IKP.800-2/2/22/MATCHING(6390100)]
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This study explores the deoxygenation of sludge palm oil using various MnCo supported AC catalysts, with MnO0.5CoO0.5/AC showing the ability to enhance heavy product yields while also leading to catalyst deactivation.
Deoxygenation is a highly significant means of generating oxygen-free hydrocarbon fuels from liquid biomass. This study will deoxygenate sludge palm oil (FFA % = 42.35%) in an H-2-free atmosphere through a series of MnCo supported AC catalysts (MnO0.5CoO0.5/AC, Mn0.5Co0.5S/AC and Mn0.5Co0.5P/AC). The XAS in-situ results confirm that the preparation method of formation the catalyst structure was successful. The catalytic results show that by oligomerizing unsaturated fatty acids produced during Diels-Alder reactions or radical additions, the MnO0.5)CoO0.5/AC can largely enhance the production of heavy products. It is a straightforward process to transform these heavy products into coke species, which enables the rapid deactivation of the catalyst. This study additionally showed that AC-supported sulphide and phosphide Mn-Co catalysts are hugely beneficial for steadily and reliably acquiring an above-average yield of diesel-range hydrocarbons at substantially reduced temperatures whilst simultaneously effectively impeding catalyst deactivation during deoxygenation. The deactivation kinetic study conform that the deactivation happens by the coke formation and flow the second order deactivation.
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