Decalin Ring Opening on Heterogeneous Me/Saponite Nanocatalysts (Me = Rh, Ru, and Ir)

Decalin Ring Opening on Heterogeneous Me/Saponite Nanocatalysts (Me = Rh, Ru, and Ir) Full article

Journal

Industrial & Engineering Chemistry Research
ISSN: 0888-5885 , E-ISSN: 1520-5045

Output data

Year: 2021, Volume: 60, Number: 21, Pages: 7802-7815 Pages count : 14 DOI: 10.1021/acs.iecr.1c00538

Authors

Finashina Elena D. ¹ , Avaev Vladimir I. ¹ , Tkachenko Olga P. ¹ , Greish Alexander A. ¹ , Davshan Nikolay A. ¹ , Kuperman Alexander ² , Caro Juergen ³ , Kustov Leonid M. ^4,1,5

Affiliations

1	N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, 119991 Moscow, Russia
2	Chevron Corp., 100 Chevron Way, Richmond, California 94802, United States
3	Gottfried Wilhelm Leibniz Universität Hannover, Postfach 6009, 30060 Hannover, Germany
4	Chemistry Department, Moscow State University, Leninskie Gory 1, bldg. 3, 119992 Moscow, Russia
5	National Science and Technology University MISiS, Leninsky prospekt 4, 119071 Moscow, Russia

Heterogeneous nanocatalysts containing metal nanoparticles (Me = Ir, Rh, and Ru) deposited on mesoporous saponite (magnesium aluminosilicate) were prepared from metal chlorides by the incipient wetness impregnation method and tested in the ring-opening reaction at high pressures using decalin as a substrate. The elemental composition of the catalysts and the carrier, the surface area, pore size and pore volume, the charge state, the size of metal nanoparticles, and the acidity were characterized by the following methods: scanning electron microscopy with energy-dispersive X-ray analysis, nitrogen adsorption–desorption analysis, Fourier-transform infrared spectroscopy, diffuse-reflectance Fourier-transform infrared spectroscopy, transmission electron microscopy, CO chemisorption, X-ray photoelectron spectroscopy, and X-ray diffraction analysis. It was shown that the structure of the carrier and the mesopore system were preserved after metal deposition. Metal particles have an extremely small size and high dispersion. The carrier has a small number of Brønsted acid sites (BAS), which decreases when the metal is supported. The highest BAS/LAS (Lewis acid sites) ratio is determined for the Rh/saponite catalyst. It was found that the activity, selectivity, and product composition were mostly affected by the metal nature. The Ir/saponite catalyst provides a selectivity of about 90% for the ring-opening products, both full and partial ring opening, at the total decalin conversion of about 80%. Over the Rh/saponite catalyst, up to 30% of the bicyclic products of the skeletal isomerization of decalin are formed along with the ring-opening products (mainly partial). The formation of a large number of C1–C9 hydrocracking products is observed over the Ru/saponite catalyst, besides the ring-opening products. Changes in the activity and selectivity of the catalysts with the variation of the main reaction parameters (T, P, WHSV, H2/C10 M ratio, and decalin partial pressure) were also determined.

Finashina E.D. , Avaev V.I. , Tkachenko O.P. , Greish A.A. , Davshan N.A. , Kuperman A. , Caro J. , Kustov L.M.
Decalin Ring Opening on Heterogeneous Me/Saponite Nanocatalysts (Me = Rh, Ru, and Ir)
Industrial & Engineering Chemistry Research. 2021. V.60. N21. P.7802-7815. DOI: 10.1021/acs.iecr.1c00538 WOS Scopus OpenAlex

Web of science:	WOS:000659430700006
Scopus:	2-s2.0-85108094282
OpenAlex:	W3165408436

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OpenAlex	4
Scopus	4
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