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Characterization of Acid-Modified Alumina as a Support for Reforming Catalysts

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Abstract

The textural and acid–base characteristics of initial alumina and alumina modified with acetic acid at different concentrations (from 0.83 to 17.4 mol/L) were studied. It was found that treatment with acetic acid did not influence on the texture characteristics and phase composition of the supports. According to the IR-spectroscopic data on adsorbed CO, an increase in the concentration of medium-strength Lewis acid sites and an increase in the total acidity of the modified supports were observed, as compared with those of the initial alumina. Among the Pt‒Re systems, a catalyst based on the support treated with acetic acid at a concentration of 1.67 mol/L exhibited the highest activity in n-heptane reforming due to an optimal composition of the acid sites of the support.

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Funding

This work was supported by the Ministry of Science and Higher Education of the Russian Federation in accordance with a program of basic research for 2013–2020 (project no. V.46.2.4, state registration no. AAAA-A17-117021450095-1).

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Authors and Affiliations

  1. Center of New Chemical Technologies, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 644040, Omsk, Russia

    V. Yu. Tregubenko & A. S. Belyi

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  1. V. Yu. Tregubenko
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  2. A. S. Belyi
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Correspondence to V. Yu. Tregubenko.

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Translated by V. Makhlyarchuk

Abbreviations: LAS, Lewis acid site; TGA, thermogravimetric analysis; DTA, differential thermal analysis; DTG, differential thermogravimetry; XRD, X-ray diffraction; CSR, coherent scattering region; PSDC, pore size distribution curve; SBET, Brunauer‒Emmett‒Teller specific surface area; Vads, adsorption pore volume; OT, amount of consumed oxygen; D, the dispersity of platinum; Ptsurface, number of surface platinum atoms; Pttotal, total number of platinum atoms; LHSV, liquid hourly space velocity.

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Tregubenko, V.Y., Belyi, A.S. Characterization of Acid-Modified Alumina as a Support for Reforming Catalysts. Kinet Catal 61, 130–136 (2020). https://doi.org/10.1134/S0023158420010097

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  • DOI: https://doi.org/10.1134/S0023158420010097

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