2013
DOI: 10.1007/s13203-013-0038-6
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Abstract: In this work, some commercial nanoporousbased catalysts, such as USY, beta and mordenite zeolites loaded with Platinum metal acting as bifunctional catalysts, were used for hydroisomerisation experiments in a fixedbed reactor at the atmospheric pressure and at feed space time 5.12 h -1 to hydroisomerise n-heptane over a temperature range of 210-270°C. The study aimed to evaluate the changes with time-on-stream in the catalytic activity, product selectivity and manner of deactivation of metalloaded zeolite cata… Show more

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Cited by 8 publications
(16 citation statements)
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References 30 publications
(43 reference statements)
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“…It can be concluded that most USY catalysts have non-framework aluminium species; the nature and crystallographic locations within the zeolite cavities of USY catalysts are different from other catalysts, due to the dealumination conditions that have been applied to create them. Similar observations can be made for the 27 Al NMR peak shapes and the corresponding chemical shifts for USY-A compared with 320HOA USY as was described in [31]. They were all produced via steaming with no acid leaching, which is clearly reflected in their catalytic performance and deactivation behaviour.…”
Section: Resultssupporting
confidence: 76%
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“…It can be concluded that most USY catalysts have non-framework aluminium species; the nature and crystallographic locations within the zeolite cavities of USY catalysts are different from other catalysts, due to the dealumination conditions that have been applied to create them. Similar observations can be made for the 27 Al NMR peak shapes and the corresponding chemical shifts for USY-A compared with 320HOA USY as was described in [31]. They were all produced via steaming with no acid leaching, which is clearly reflected in their catalytic performance and deactivation behaviour.…”
Section: Resultssupporting
confidence: 76%
“…USY zeolite structure was confirmed from the XRD pattern for a fresh sample with 2 wt% sodium content as supplied, 320HOA USY has a lower crystallinity but a higher unit cell size compared with CBV712 USY and CBV720 USY as explained in the previous work [31]. This can be related to the fact that 320HOA USY was produced via less steaming dealumination process and that no acid leaching was applied afterwards, which can be confirmed by the lower bulk Si/Al molar ratio.…”
Section: Resultssupporting
confidence: 60%
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“…stainless steel fixed bed reactor. The details of the catalyst preparation, characterization, and experimental system are given in Alotaibi et al [11]. However, Table I gives some of the characterization properties such as bulk Si/Al ratio; surface area, pore volume, and pore size measured by N 2 -BET technique; Pt content by ICP (Inductively Coupled Plasma Spectroscopy); and catalyst acidity by ammonia TPD (Temperature Programmed Desorption) of the two catalysts.…”
Section: Methodsmentioning
confidence: 99%