Hydrocracking vegetable oil on borate-containing catalysts: Effect of nature of support
- Authors: Chumachenko Y.A.1, Trenikhin M.V.1,2, Talzi V.P.1, Gulyaeva T.I.1, Paukshtis E.A.3
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Affiliations:
- Institute of Hydrocarbon Processing, Siberian Branch
- Omsk Scientific Center, Siberian Branch
- Boreskov Institute of Catalysis, Siberian Branch
- Issue: Vol 58, No 5 (2017)
- Pages: 563-576
- Section: Article
- URL: https://journal-vniispk.ru/0023-1584/article/view/163260
- DOI: https://doi.org/10.1134/S0023158417050032
- ID: 163260
Cite item
Abstract
The structure, texture, and acid properties of platinum catalysts on oxide (Al2O3, ZrO2, ZrO2–Al2O3) and borate-containing supports (B2O3–Al2O3, B2O3–ZrO2) are studied. The catalysts are tested in the process of hydrocracking sunflower-seed oil at 380°C, 4.0 MPa, and a weight stock feed rate of 1.0 h–1. It has been found that aluminum oxide (A) contains the γ-Al2O3 phase, zirconium dioxide (Z) includes 85 and 15 rel. % of the monoclinic (M) and tetragonal (T) phases, respectively, while zirconium dioxide with the addition of 2.5 wt % Al2O3 (ZA) comprises 14 and 86 rel. % of the M–ZrO2 and T–ZrO2 phases, respectively. The B2O3–Al2O3 (BA) and B2O3–ZrO2 (BZ) systems modified with boron oxide (20 wt %) are X-ray amorphous. A Pt/BA catalyst differs from a Pt/A catalyst, while a Pt/BZ catalyst has a larger specific surface area and acidity than Pt/Z and Pt/ZA catalysts and contains Bronsted acidic centers (BACs) along with Lewis acidic centers (LACs). Only LACs are present on the surface of Pt/A, Pt/Z, and Pt/ZA catalysts. The LAC/BAC ratio in Pt/BA and Pt/BZ catalysts is 0.3 and 1.0, respectively. All the catalysts provide complete oil conversion to give C5+ hydrocarbons with a yield of 81.7–87.3 wt %. Pt/A catalyzes mainly decarboxylation and hydrogenation–dehydration reactions, while Pt/Z and Pt/ZA provide decarboxylation. The yield of diesel fraction reaches 71.8–73.9 wt % with an n-alkane content of 94.0–95.9 wt %. One-stage oil hydrocracking with the prevalence of hydrodecarbonylation and hydrogenation–dehydration reactions occurs on Pt/BA and Pt/BZ catalysts for 20 h to give the yield of the diesel fraction of at least 81.4 and 74.4 wt % and the total content of iso-alkanes and cycloalkanes of at least 28.3 and 60.7 wt %, respectively.
About the authors
Yu. A. Chumachenko
Institute of Hydrocarbon Processing, Siberian Branch
Author for correspondence.
Email: juliana@ihcp.ru
Russian Federation, Omsk, 644040
M. V. Trenikhin
Institute of Hydrocarbon Processing, Siberian Branch; Omsk Scientific Center, Siberian Branch
Email: juliana@ihcp.ru
Russian Federation, Omsk, 644040; Omsk, 644024
V. P. Talzi
Institute of Hydrocarbon Processing, Siberian Branch
Email: juliana@ihcp.ru
Russian Federation, Omsk, 644040
T. I. Gulyaeva
Institute of Hydrocarbon Processing, Siberian Branch
Email: juliana@ihcp.ru
Russian Federation, Omsk, 644040
E. A. Paukshtis
Boreskov Institute of Catalysis, Siberian Branch
Email: juliana@ihcp.ru
Russian Federation, Novosibirsk, 630090
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