Effect of the Carbon Support Graphitization on the Activity and Thermal Stability of Ru-Ba-Cs/C Ammonia Decomposition Catalysts | Sciact - CRIS-system of Boreskov Institute of Catalysis

Effect of the Carbon Support Graphitization on the Activity and Thermal Stability of Ru-Ba-Cs/C Ammonia Decomposition Catalysts Full article

Journal

Reaction Kinetics, Mechanisms and Catalysis
ISSN: 1878-5190 , E-ISSN: 1878-5204

Output data

Year: 2019, Volume: 127, Number: 1, Pages: 85–102 Pages count : 18 DOI: 10.1007/s11144-019-01555-3

Tags

Three-component catalysts; Carbon support; Ammonia decomposition; Graphitization; Thermal stability; Characterization

Authors

Iost Kristina N. ¹ , Borisov Vadim A. ¹ , Temerev Victor L. ¹ , Smirnova Nadezhda S. ² , Surovikin Yury V. ¹ , Trenikhin Mikhail V. ¹ , Arbuzov Aleksey B. ¹ , Gulyaeva Tatyana I. ¹ , Shlyapin Dmitry A. ¹ , Tsyrulnikov Pavel G. ¹ , Vedyagin Aleksey A. ^3,4

Affiliations

1	Institute of Hydrocarbons Processing SB RAS, Neftezavodskaya st. 54, Omsk, Russian Federation 644040
2	Kurnakov Institute of General and Inorganic Chemistry RAS, Leninsky pr. 31, Moscow, Russian Federation 119991
3	Boreskov Institute of Catalysis SB RAS, pr. Ac. Lavrentieva 5, Novosibirsk, Russian Federation 630090
4	National Research Tomsk Polytechnic University, Lenin Av. 30, Tomsk, Russian Federation 634050

Funding (1)

Federal Agency for Scientific Organizations

V.46.2.5. (АААА-А17-117021450096-8)

Three-component Ru-Ba-Cs/C catalysts supported on the graphite-like carbonaceous composite material Sibunit were synthesized. The effects of the graphitization procedure of the support (thermal treatment at 1900 °C) on the phase composition and the distribution of the components were studied. The catalytic activity in the ammonia decomposition reaction and the thermal stability of the samples were examined in comparison with the untreated support. The samples were characterized by Raman spectroscopy, XAFS, TEM, and XRD methods. It was found that in the case of untreated support, Ru presents in the form of both the metallic and partially oxidized fine particles. The graphitization of the carbon support facilitates the formation of large, well-crystallized metal particles. Barium in both samples was found to be unevenly distributed and presented mainly as large particles of carbonate. Cesium-containing species were not detected. The effect of the support graphitization on the thermal stability is comparable with catalyst modification by Ba and Cs. At the same time, combination of these effects noticeably increases the efficiency of the catalyst. Thus, the non-promoted Ru catalyst deposited on the untreated support decomposes 107 g of NH3 per 1 g of the lost carbon. Modification of the catalyst with Ba and Cs allows one to increase this value up to 498 g of NH3, while graphitization of the support and application of the combined approach were shown to give 910 and 1577 g, correspondingly.

Iost K.N. , Borisov V.A. , Temerev V.L. , Smirnova N.S. , Surovikin Y.V. , Trenikhin M.V. , Arbuzov A.B. , Gulyaeva T.I. , Shlyapin D.A. , Tsyrulnikov P.G. , Vedyagin A.A.
Effect of the Carbon Support Graphitization on the Activity and Thermal Stability of Ru-Ba-Cs/C Ammonia Decomposition Catalysts
Reaction Kinetics, Mechanisms and Catalysis. 2019. V.127. N1. P.85–102. DOI: 10.1007/s11144-019-01555-3 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Jan 9, 2019
Accepted:	Mar 2, 2019
Published online:	Mar 9, 2019
Published print:	Jun 1, 2019

Web of science:	WOS:000468213500008
Scopus:	2-s2.0-85062781371
Elibrary:	45855346
Chemical Abstracts:	2019:662595
Chemical Abstracts (print):	170:598983
OpenAlex:	W2921152756

DB	Citing
Web of science	13
Elibrary	14
OpenAlex	18