Green diesel production by solvent-free deoxygenation of oleic acid over nickel phosphide bifunctional catalysts: Effect of the support

FUEL

卷:281

Article

Camargo, Mariana de Oliveira¹  Castagnari Willimann Pimenta, Joao Lourenco¹  Camargo, Marilia de Oliveira¹  Arroyo, Pedro Augusto¹ 

[1] Univ Estadual Maringa, Dept Chem Engn, 5790 Colombo Ave, BR-87020680 Maringa, Parana, Brazil

关键词: Hydrocarbons;    Drop-in fuels;    Hydrotreating;    Vegetable oils;    Zeolites;   

DOI  :  10.1016/j.fuel.2020.118719

来源: Elsevier

【 摘 要 】

An alternative to non-renewable fuels is the production of green diesel from deoxygenation of vegetable oils. In this study, the effect of the supports on nickel phosphide catalysts for deoxygenation of oleic acid to produce hydrocarbons was investigated. Nickel phosphide catalysts supported on USY, H-ZSM-5 and Al-SBA-15 were synthetized by temperature programmed reduction (TPR) of metal phosphate precursors and the prepared catalysts were characterized by atomic absorption spectroscopy (AAS), X-ray diffraction (XRD), small angle X-ray scattering (SAXS), temperature programmed reduction of hydrogen (TPR), nitrogen physisorption, temperature programmed desorption of ammonia (TPD), transmission electron microscopy (TEM) and Fourier-transform infrared spectroscopy (FTIR). The catalytic tests were performed in an autoclave batch reactor at 260 degrees C, 280 degrees C and 300 degrees C and 50 bar of hydrogen. The production of hydrocarbons (C10-C18) at 300 degrees C followed the order: Ni2P/Al-SBA-15 > Ni2P/H-ZSM-5 > Ni2P/USY. The Ni2P/Al-SBA-15 exhibited a remarkable deoxygenation activity, compared to noble metals. All the catalysts achieved more C17 than C18 hydrocarbons, therefore, decarbonylation/decarboxylation reactions prevail. With regard the temperature effect, the amount of hydrocarbons increased from 260 degrees C to 280 degrees C but it decreased from 280 degrees C to 300 degrees C for all catalysts, which can be ascribed to catalyst deactivation.

【 授权许可】

Free