Hydrocracking of cumene over Ni/Al 2O 3 as influenced by CeO 2 doping and γ-irradiation
Cumene hydrocracking was carried out over pure and doped Ni/Al 2O 3 solids and also, on these solids after exposure to different doses of γ-rays between 0.4 and 1.6 MGy. The dopant concentration was varied between 1 and 4 mol% CeO 2. Pure and doped samples were subjected to heat treatment at 400°C a...
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Published in | Radiation physics and chemistry (Oxford, England : 1993) Vol. 69; no. 1; pp. 31 - 37 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
2004
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Subjects | |
Online Access | Get full text |
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Summary: | Cumene hydrocracking was carried out over pure and doped Ni/Al
2O
3 solids and also, on these solids after exposure to different doses of
γ-rays between 0.4 and 1.6
MGy. The dopant concentration was varied between 1 and 4
mol% CeO
2. Pure and doped samples were subjected to heat treatment at 400°C and cumene hydrocracking reaction was carried out using various solids at temperatures between 250°C and 400°C by means of micropulse technique. The results showed that both CeO
2 doping and
γ-irradiation of the investigated system brought about an increase in its specific surface area.
γ-irradiation of pure samples increased their catalytic activities effectively. However, the doping caused a decrease in the catalytic activity.
γ-irradiation of the doped samples brought about a net decrease in the catalytic activity.
The catalytic reaction products over different investigated solids were ethylbenzene as a major product together with different amounts of toluene, benzene and C
1–C
3 gaseous hydrocarbons. The selectivity towards the formation of various reaction products varies with the reaction temperature, doping and
γ-irradiation. |
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ISSN: | 0969-806X 1879-0895 |
DOI: | 10.1016/S0969-806X(03)00444-4 |