Catalytic deoxygenation of triglyceride into drop-in fuel under hydrothermal condition with the help of in-situ hydrogen production by APR of glycerol by-produced

A large amount of the hydrogen deriving from fossil resources is consumed for the existent catalytic processes to produce drop-in fuel from lipid resources. For targeting the cost-reasonable and environmentally benign production, the rapeseed oil deoxygenation catalyzed by Pt/Al2O3 was tested under hydrothermal condition with an autoclave reactor in the present research work, in the expectation that renewable hydrogen was produced in-situ by aqueous phase reforming (APR) of the glycerol by-produced. For the catalytic hydrothermal deoxygenation operated at 593 K for 1.5 h, hydrocarbons was yielded by 18.0% and the major hydrocarbon product was the unsaturated C17. The hydrocarbons yield was raised markedly by employing Pt/SBA-15 catalyst. Also, APR of the reagent glycerol was tested preliminarily in order to evaluate the in-situ hydrogen production. There is none of the research work where the catalytic hydrothermal deoxygenation was investigated with referring to the insitu hydrogen production estimated from the APR reaction tested separably, to the best of our knowledge. Furthermore, the balance between hydrogen production and consumption for the catalytic hydrothermal deoxygenation was examined quantitatively for understanding it deeply. Additionally, our experimental results were reviewed with referring to the concerning previous works.

Automated summary

This research investigated the catalytic deoxygenation of rapeseed oil catalyzed by Pt/Al2O3 under hydrothermal conditions, aiming to produce renewable hydrogen through APR. Using Pt/SBA-15 catalyst increased hydrocarbon yield, and preliminary APR testing was conducted to evaluate in-situ hydrogen production. No previous studies have extensively explored the insitu hydrogen production from APR in the context of catalytic hydrothermal deoxygenation.