Dehydrogenation of isopropyl alcohol on modified cobalt catalyst

The effects of plasmochemical processing and of Ce, K, and Hf additives on the rate of dehydrogenation for isopropyl alcohol on a 5 wt % Co/SiO2 catalyst is studied under static and flow conditions. Glow discharge plasma in O2 and Ar and high-frequency electrodeless plasma in H2 (HF-H2) are used. Except for one sample containing Hf, an increase in catalytic activity is observed due to the formation of new active centers. The change in the composition of the initial catalyst's surface after treatment with Ce and with oxygen, argon, and HF-H2 plasmas is determined by means of X-ray photoelectron spectroscopy. The change in the size and shape of Co particles after treating the catalyst with HF-H2 plasma and Ce is determined via X-ray phase analysis. It is suggested that the new catalytic centers formed after treatment in O2 and Ar plasma contain carbon atoms with C1s bond energies of 282.1 eV; after treatment with HF-H2 plasma, active centers contain hydrogen and carbon atoms with C1s bond energies of 282.5 eV; with cerium, the C1s bond energy is 297.7 eV. © 2014 Pleiades Publishing, Ltd.

Authors
Platonov E.A. 1 , Naumkin A.V.2 , Volkov I.O.2 , Lobanov N.N. 1 , Protasova I.A. 1 , Yagodovskaya T.V. 3 , Yagodovskii V.D. 1
Editors
-
Publisher
-
Number of issue
5
Language
English
Pages
768-773
Status
Published
Department
-
Number
-
Volume
88
Year
2014
Organizations
  • 1 Peoples' Friendship University, Moscow 117198, Russian Federation
  • 2 Nesmeyanov Institute of Organoelement Compounds, Moscow 119991, Russian Federation
  • 3 Department of Chemistry, Moscow State University, Moscow 119991, Russian Federation
Keywords
cobalt catalyst; dehydrogenation of isopropyl alcohol; plasma treatment
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/4999/