Continuous selective deoxygenation of palm oil for renewable diesel production over Ni catalysts supported on Al2O3 and La2O3-Al2O3
Papageridis, K.N. ; Charisiou, N.D. ; Douvartzides, S. ; Sebastian, V. (Universidad de Zaragoza) ; Hinder, S.J. ; Baker, M.A. ; AlKhoori, A.A. ; AlKhoori, S.I. ; Polychronopoulou, K. ; Goula, M.A.
Resumen: The present study provides, for the first time in the literature, a comparative assessment of the catalytic performance of Ni catalysts supported on ¿-Al2O3and ¿-Al2O3modified with La2O3, in a continuous flow trickle bed reactor, for the selective deoxygenation of palm oil. The catalysts were preparedviathe wet impregnation method and were characterized, after calcination and/or reduction, by N2adsorption/desorption, XRD, NH3-TPD, CO2-TPD, H2-TPR, H2-TPD, XPS and TEM, and after the time-on-stream tests, by TGA, TPO, Raman and TEM. Catalytic experiments were performed between 300-400 °C, at a constant pressure (30 bar) and different LHSV (1.2-3.6 h-1). The results show that the incorporation of La2O3in the Al2O3support increased the Ni surface atomic concentration (XPS), affected the nature and abundance of surface basicity (CO2-TPD), and despite leading to a drop in surface acidity (NH3-TPD), the Ni/LaAl catalyst presented a larger population of medium-strength acid sites. These characteristics helped promote the SDO process and prevented extended cracking and the formation of coke. Thus, higher triglyceride conversions andn-C15ton-C18hydrocarbon yields were achieved with the Ni/LaAl at lower reaction temperatures. Moreover, the Ni/LaAl catalyst was considerably more stable during 20 h of time-on-stream. Examination of the spent catalysts revealed that both carbon deposition and degree of graphitization of the surface coke, as well as, the extent of sintering were lower on the Ni/LaAl catalyst, explaining its excellent performance during time-on-stream.
Idioma: Inglés
DOI: 10.1039/d0ra08541c
Año: 2021
Publicado en: RSC Advances 11, 15 (2021), 8569-8584
ISSN: 2046-2069
Factor impacto JCR: 4.036 (2021)
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 75 / 180 = 0.417 (2021) - Q2 - T2
Factor impacto CITESCORE: 5.9 - Chemical Engineering (Q2)
Factor impacto SCIMAGO: 0.667 - Chemistry (miscellaneous) (Q1) - Chemical Engineering (miscellaneous) (Q1)
Tipo y forma: Article (Published version)
Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
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Idioma: Inglés
DOI: 10.1039/d0ra08541c
Año: 2021
Publicado en: RSC Advances 11, 15 (2021), 8569-8584
ISSN: 2046-2069
Factor impacto JCR: 4.036 (2021)
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 75 / 180 = 0.417 (2021) - Q2 - T2
Factor impacto CITESCORE: 5.9 - Chemical Engineering (Q2)
Factor impacto SCIMAGO: 0.667 - Chemistry (miscellaneous) (Q1) - Chemical Engineering (miscellaneous) (Q1)
Tipo y forma: Article (Published version)
Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2023-05-18-13:47:03)
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Record created 2021-05-25, last modified 2023-05-19