Ni catalyst deactivation in the reaction of hydrogen iodide

P. Favuzza, C. Felici, C. Mazzocchia, A. Spadoni, P. Tarquini, A.C. Tito

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Abstract

In a previous work, it has been studied some Ni-catalysts prepared from different precursors (Ni(C5H7O2)2and Ni(NO3)26H2O) via impregnation-calcination or co-precipitation techniques, using commercial γ-alumina as support. The study pointed out a high initial conversion value for the reaction of hydrogen iodide decomposition at 500°C, but in few hours a progressive deactivation of the catalysts occurred. In order to understand this phenomena, three new catalysts have been prepared starting from Ni(acac)2,usmg mesoporous aluminas as support. The initial conversion of HI decomposition with these new catalysts (showing a larger surface area and Ni0crystallites on it) was almost coincident with theoretical equilibrium value. Their deactivation at 500°C was slower than that of the catalysts studied in the previous work. Copyright © 2009, AIDIC Servizi S.r.l.
Original languageEnglish
Pages (from-to)73 - 80
Number of pages8
JournalChemical Engineering Transactions
Volume17
DOIs
Publication statusPublished - 2009

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Cite this

Favuzza, P., Felici, C., Mazzocchia, C., Spadoni, A., Tarquini, P., & Tito, A. C. (2009). Ni catalyst deactivation in the reaction of hydrogen iodide. Chemical Engineering Transactions, 17, 73 - 80. https://doi.org/10.3303/CET0917013