Catalytic behavior of Pt nanoparticles dealuminated Y-zeolite for some n-alkane hydroisomerization
Dealuminated zeolite Y-supported platinum was prepared adopting two dealumination methods, viz. fast (1, 3 and 6 h) and slow method (18 h). The content of Pt was constant at 0.5 wt% in all investigated catalysts. The prepared samples were characterized using TGA/DSC, XRD, FTIR techniques, nitrogen a...
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Egyptian Petroleum Research Institute
2014-06-01
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| Series: | Egyptian Journal of Petroleum |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110062114000282 |
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| author | S.A. Hanafi H.M. Gobara M.S. Elmelawy S.A. Abo-El-Enein A.A. Alkahlawy |
| author_facet | S.A. Hanafi H.M. Gobara M.S. Elmelawy S.A. Abo-El-Enein A.A. Alkahlawy |
| author_sort | S.A. Hanafi |
| collection | DOAJ |
| description | Dealuminated zeolite Y-supported platinum was prepared adopting two dealumination methods, viz. fast (1, 3 and 6 h) and slow method (18 h). The content of Pt was constant at 0.5 wt% in all investigated catalysts. The prepared samples were characterized using TGA/DSC, XRD, FTIR techniques, nitrogen adsorption at −196 °C and TEM-connected with energy dispersive spectroscopy (EDS). Surface acidity was investigated via pyridine adsorption using FT-IR spectroscopy. The parent and dealuminated Y-zeolite samples were characterized by their microporous system. By increasing the dealumination time to 6 h, the increased specific surface area and total pore volume indicated a sort of pore opening taking place with an increase in the accessibility of nitrogen molecules. DSC confirmed the thermal stability of the dealuminated zeolite samples up to 800 °C. The prepared catalysts were tested through hydroisomerization reactions of n-hexane and n-heptane using a micro-catalytic pulse technique. Different catalytic behaviors could be distinguished for the dealuminated samples based on competitive reactions; hydro-isomerization, hydrocracking and cyclization. Slow dealumination leads to the most selective catalysts for hydroisomerization. n-Heptane was converted to higher extent than n-hexane; cracking process was more evident when the former was fed to the reactor. |
| format | Article |
| id | doaj-art-3c189f17976344199acf0dfed5cfec46 |
| institution | Kabale University |
| issn | 1110-0621 |
| language | English |
| publishDate | 2014-06-01 |
| publisher | Egyptian Petroleum Research Institute |
| record_format | Article |
| series | Egyptian Journal of Petroleum |
| spelling | doaj-art-3c189f17976344199acf0dfed5cfec462025-08-20T03:55:37ZengEgyptian Petroleum Research InstituteEgyptian Journal of Petroleum1110-06212014-06-0123215116110.1016/j.ejpe.2014.05.001Catalytic behavior of Pt nanoparticles dealuminated Y-zeolite for some n-alkane hydroisomerizationS.A. Hanafi0H.M. Gobara1M.S. Elmelawy2S.A. Abo-El-Enein3A.A. Alkahlawy4Catalysis Department, Refining Division, Egyptian Petroleum Research Institute, Nasr City 11727, Cairo, EgyptCatalysis Department, Refining Division, Egyptian Petroleum Research Institute, Nasr City 11727, Cairo, EgyptCatalysis Department, Refining Division, Egyptian Petroleum Research Institute, Nasr City 11727, Cairo, EgyptDepartment of Chemistry, Faculty of Science, Ain Shams University, Cairo, EgyptCatalysis Department, Refining Division, Egyptian Petroleum Research Institute, Nasr City 11727, Cairo, EgyptDealuminated zeolite Y-supported platinum was prepared adopting two dealumination methods, viz. fast (1, 3 and 6 h) and slow method (18 h). The content of Pt was constant at 0.5 wt% in all investigated catalysts. The prepared samples were characterized using TGA/DSC, XRD, FTIR techniques, nitrogen adsorption at −196 °C and TEM-connected with energy dispersive spectroscopy (EDS). Surface acidity was investigated via pyridine adsorption using FT-IR spectroscopy. The parent and dealuminated Y-zeolite samples were characterized by their microporous system. By increasing the dealumination time to 6 h, the increased specific surface area and total pore volume indicated a sort of pore opening taking place with an increase in the accessibility of nitrogen molecules. DSC confirmed the thermal stability of the dealuminated zeolite samples up to 800 °C. The prepared catalysts were tested through hydroisomerization reactions of n-hexane and n-heptane using a micro-catalytic pulse technique. Different catalytic behaviors could be distinguished for the dealuminated samples based on competitive reactions; hydro-isomerization, hydrocracking and cyclization. Slow dealumination leads to the most selective catalysts for hydroisomerization. n-Heptane was converted to higher extent than n-hexane; cracking process was more evident when the former was fed to the reactor.http://www.sciencedirect.com/science/article/pii/S1110062114000282Y-zeoliteDealuminationHeptaneHexaneHydroisomerizationPlatinum |
| spellingShingle | S.A. Hanafi H.M. Gobara M.S. Elmelawy S.A. Abo-El-Enein A.A. Alkahlawy Catalytic behavior of Pt nanoparticles dealuminated Y-zeolite for some n-alkane hydroisomerization Egyptian Journal of Petroleum Y-zeolite Dealumination Heptane Hexane Hydroisomerization Platinum |
| title | Catalytic behavior of Pt nanoparticles dealuminated Y-zeolite for some n-alkane hydroisomerization |
| title_full | Catalytic behavior of Pt nanoparticles dealuminated Y-zeolite for some n-alkane hydroisomerization |
| title_fullStr | Catalytic behavior of Pt nanoparticles dealuminated Y-zeolite for some n-alkane hydroisomerization |
| title_full_unstemmed | Catalytic behavior of Pt nanoparticles dealuminated Y-zeolite for some n-alkane hydroisomerization |
| title_short | Catalytic behavior of Pt nanoparticles dealuminated Y-zeolite for some n-alkane hydroisomerization |
| title_sort | catalytic behavior of pt nanoparticles dealuminated y zeolite for some n alkane hydroisomerization |
| topic | Y-zeolite Dealumination Heptane Hexane Hydroisomerization Platinum |
| url | http://www.sciencedirect.com/science/article/pii/S1110062114000282 |
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