The influence of plasma chemical treatment of nickel and nickel-rhenium catalysts deposited on sibunite on their activity in dehydrogenation

The dehydrogenation of isopropanol was studied at 440-680 K to find that the activity of the Ni(1 wt %)/sibunite catalyst decreased after annealings and quenchings and was stabilized after subsequent treatment with an (I) O 2 glow-discharge or (II) H2 high-frequency plasma. Treatments of both kinds decreased the activity of the catalyst below the Curie point (633 K) and increased it over the paramagnetic temperature range (635-680 K). The treatment of the (1 wt % Ni-1 wt %Re)/sibunite and (2 wt % Ni-2 wt % Re)/sibunite catalysts with plasma II weakly influenced their activity, whereas treatment with plasma I substantially increased it. The kinetic reaction parameters on the (2 wt % Ni-2 wt % Re)/sibunite catalyst were found to depend on the duration of treatment with plasma II. Treatment with plasma I much more effectively changed the state of the surface of all the catalysts studied than treatment with plasma II. © Nauka/Interperiodica 2007.

Editors
-
Publisher
-
Number of issue
5
Language
English
Pages
696-700
Status
Published
Department
-
Number
-
Volume
81
Year
2007
Organizations
  • 1 Peoples Friendship University, ul. Miklukho-Maklaya 6, Moscow, 117198, Russian Federation
  • 2 Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, Leninskii pr. 47, Moscow, 119991, Russian Federation
  • 3 Faculty of Chemistry, Moscow State University, Leninskie gory, Moscow, 119992, Russian Federation
Keywords
Annealing; Curie temperature; Dehydrogenation; Deposition; Glow discharges; Nickel; Paramagnetic materials; Plasma applications; Paramagnetic temperature; Plasma chemical treatment; Sibunite; Catalyst activity
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/3241/