Surface and Catalytic Properties of the γ-Irradiated ZnO-Treated CoO/AlO System
Pure and ZnO-doped Co 3 O 4 /Al 2 O 3 catalysts were subjected to γ-irradiation (0.2–1.6 MGy). These catalysts were employed for the conversion of ethanol and isopropanol at 250–400°C using micropulse techniques. The results obtained showed that ZnO treatment increased the activity and selectivity t...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2001-11-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617011494556 |
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| _version_ | 1841564120729518080 |
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| author | M.M. Doheim H.A. El-Boohy M. Mokhtar G.A. El-Shobaky |
| author_facet | M.M. Doheim H.A. El-Boohy M. Mokhtar G.A. El-Shobaky |
| author_sort | M.M. Doheim |
| collection | DOAJ |
| description | Pure and ZnO-doped Co 3 O 4 /Al 2 O 3 catalysts were subjected to γ-irradiation (0.2–1.6 MGy). These catalysts were employed for the conversion of ethanol and isopropanol at 250–400°C using micropulse techniques. The results obtained showed that ZnO treatment increased the activity and selectivity towards dehydrogenation of the alcohols studied. On the other hand, γ-irradiation resulted in a progressive decrease in activity which fell to a minimum value at 0.8 MGy and then increased back to the original (unirradiated) value on increasing the dose further. γ-Irradiation of ZnO-treated catalysts also led to a decrease in their catalytic activity. However, in this case, the extent of such a decrease as a function of the dose applied decreased as the amount of ZnO in the catalysts increased up to 2.63 wt%. This finding was observed when the catalyzed reaction was conducted at 250–350°C, but the reverse trend was exhibited when the reaction was conducted at 350–400°C. |
| format | Article |
| id | doaj-art-ad93ffaa65b04e0a918cff731c58a158 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2001-11-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-ad93ffaa65b04e0a918cff731c58a1582025-01-02T23:11:15ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382001-11-011910.1260/0263617011494556Surface and Catalytic Properties of the γ-Irradiated ZnO-Treated CoO/AlO SystemM.M. Doheim0H.A. El-Boohy1M. MokhtarG.A. El-Shobaky2 Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt National Centre for Radiation Research and Technology (NCRRT), Nasr City, Cairo, Egypt Department of Physical Chemistry, National Research Centre, Dokki, Cairo, EgyptPure and ZnO-doped Co 3 O 4 /Al 2 O 3 catalysts were subjected to γ-irradiation (0.2–1.6 MGy). These catalysts were employed for the conversion of ethanol and isopropanol at 250–400°C using micropulse techniques. The results obtained showed that ZnO treatment increased the activity and selectivity towards dehydrogenation of the alcohols studied. On the other hand, γ-irradiation resulted in a progressive decrease in activity which fell to a minimum value at 0.8 MGy and then increased back to the original (unirradiated) value on increasing the dose further. γ-Irradiation of ZnO-treated catalysts also led to a decrease in their catalytic activity. However, in this case, the extent of such a decrease as a function of the dose applied decreased as the amount of ZnO in the catalysts increased up to 2.63 wt%. This finding was observed when the catalyzed reaction was conducted at 250–350°C, but the reverse trend was exhibited when the reaction was conducted at 350–400°C.https://doi.org/10.1260/0263617011494556 |
| spellingShingle | M.M. Doheim H.A. El-Boohy M. Mokhtar G.A. El-Shobaky Surface and Catalytic Properties of the γ-Irradiated ZnO-Treated CoO/AlO System Adsorption Science & Technology |
| title | Surface and Catalytic Properties of the γ-Irradiated ZnO-Treated CoO/AlO System |
| title_full | Surface and Catalytic Properties of the γ-Irradiated ZnO-Treated CoO/AlO System |
| title_fullStr | Surface and Catalytic Properties of the γ-Irradiated ZnO-Treated CoO/AlO System |
| title_full_unstemmed | Surface and Catalytic Properties of the γ-Irradiated ZnO-Treated CoO/AlO System |
| title_short | Surface and Catalytic Properties of the γ-Irradiated ZnO-Treated CoO/AlO System |
| title_sort | surface and catalytic properties of the γ irradiated zno treated coo alo system |
| url | https://doi.org/10.1260/0263617011494556 |
| work_keys_str_mv | AT mmdoheim surfaceandcatalyticpropertiesofthegirradiatedznotreatedcooalosystem AT haelboohy surfaceandcatalyticpropertiesofthegirradiatedznotreatedcooalosystem AT mmokhtar surfaceandcatalyticpropertiesofthegirradiatedznotreatedcooalosystem AT gaelshobaky surfaceandcatalyticpropertiesofthegirradiatedznotreatedcooalosystem |