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      Continuous selective deoxygenation of palm oil for renewable diesel production over Ni catalysts supported on Al 2 O 3 and La 2 O 3 –Al 2 O 3 †

      Rsc Advances

      The Royal Society of Chemistry

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          Abstract

          The present study provides, for the first time in the literature, a comparative assessment of the catalytic performance of Ni catalysts supported on γ-Al2O3 and γ-Al2O3 modified with La2O3, in a continuous flow trickle bed reactor, for the selective deoxygenation of palm oil. The catalysts were prepared via the wet impregnation method and were characterized, after calcination and/or reduction, by N2 adsorption/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 La2O3 in the Al2O3 support 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 and n-C15 to n-C18 hydrocarbon 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.

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          • Record: found
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            • Record: found
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            Hydrotreatment of Fast Pyrolysis Oil Using Heterogeneous Noble-Metal Catalysts

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              • Record: found
              • Abstract: not found
              • Article: not found

              Bifunctional transalkylation and hydrodeoxygenation of anisole over a Pt/HBeta catalyst

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                Author and article information

                Journal
                35423403
                8695223
                10.1039/d0ra08541c

                https://creativecommons.org/licenses/by-nc/3.0/

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