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Aguilar‐Ríos, G.; Salas, P.; Valenzuela, Miguel A.; Armendáriz, H.; Wang, J.A.; Salmones, J.

doi:10.1023/a:1019086419498

Cited by 39 publications

(23 citation statements)

References 9 publications

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“…Although many efforts have been made to modify Pt-supported catalysts, deactivation due to coking is still not completely overcome, and catalysts must undergo continuous or frequent regeneration processes to restore the catalytic activity [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Influence of Oxygen Mobility over Supported Pt Catalysts on Combustion Temperature of Coke Generated in Propane Dehydrogenation

Shin

2010

Catal Lett

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Five supported Pt catalysts (Pt/SBA-15, Pt/Al 2 O 3 , Pt/MgO, Pt/CeO 2 , and Pt/Ce 0.63 Zr 0.37 O 2 ) were prepared to systematically investigate the influence of oxygen mobility over the support on combustion temperatures of coke produced in propane dehydrogenation. A strong correlation between the oxygen mobility of the supports and the combustion temperature of the coke was observed. The coke combustion temperatures increased following the reverse order of oxygen mobility of the supports: CeZrO 2 [ CeO 2 [ MgO [ Al 2 O 3 [ SBA-15, implying that the oxygen transfer over supports was a ratedetermining step in the coke combustion process.

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Section: Introductionmentioning

confidence: 99%

Influence of Oxygen Mobility over Supported Pt Catalysts on Combustion Temperature of Coke Generated in Propane Dehydrogenation

Shin

2010

Catal Lett

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“…There are many researches on the application of spinel as the supports of PtSn catalysts for butane dehydrogenation [20,21], however, less attention has been paid to the catalysts supported on spinel for propane dehydrogenation. Aguilar-Ríos et al [22] studied the propane dehydrogenation activity of Pt and Pt-Sn catalysts supported on magnesium aluminate, and found that the activity and propylene selectivity of the catalysts were low. Akporiaye et al [16] reported a good dehydrogenation performance over PtSn/MgAl 2 O 4 catalyst which was obtained under the condition of 600°C.…”

Section: Introductionmentioning

confidence: 99%

Propane Dehydrogenation Over PtSn Catalysts Supported on ZnO-Modified MgAl2O4

Wang

et al. 2009

Catal Lett

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Platinum and tin supported on ZnO-modified MgAl 2 O 4 constitutes a new and efficient catalyst for the dehydrogenation of propane. The structure of the catalyst has been studied by XRD, TEM, BET, TG, H 2 -TPR and H 2 chemisorption and catalytic properties for propane dehydrogenation have been tested on a microreactor. It has been shown that the catalyst is superior to conventional aluminasupported PtSn systems and PtSn/MgAl 2 O 4 in terms of lifetime stability, activity and propene selectivity. The characterization results of catalysts revealed that ZnOmodified catalysts can increase the Pt dispersion and enhance the interaction between metal and support, resulting in the increase of catalytic activity for propane dehydrogenation.

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“…Nowadays there is a growing interest in the utilization of MgAl 2 O 4 spinel as catalysts or catalyst support in the field of environmental catalysis, petroleum processing and fine chemical production [23]. Due to its moderate acidity and good thermal stability, it has been used as a catalyst support for the steam-reforming of methane and propane dehydrogenation [24]. It is reported as a support for Pt-Sn metals instead of alumina.…”

Section: Introductionmentioning

confidence: 99%

“…In the field of catalysis MgAl 2 O 4 spinel is generally prepared at a moderate temperature range from 600 to 900°C to obtain a suitable pore distribution and large surface area. In such case coprecipitation and sol-gel methods are often used [24,26]. Zdražil [27] reported that MgAl 2 O 4 spinel attaining most desired properties like large surface area, small crystalline size and special active sites can be controlled by its preparation method.…”

Section: Introductionmentioning

confidence: 99%

Influence of Mg Addition on the Catalytic Activity of Alumina Supported Ag for C3H6-SCR of NO

et al. 2009

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The influence of different magnesium (Mg) weight percentages (1, 2.5, 5, 7.5 and 10) over silver (3 wt%) impregnated alumina (SA) catalyst was investigated for the reduction of NO by C 3 H 6 . Mg doped SA catalysts were prepared by conventional impregnation method and characterized by XRD, BET-SA, ICP-MS, XPS, SEM, UV-DRS, H 2 -TPR and O 2 -TPD. The existence of MgO and MgAl 2 O 4 phases on Mg doped SA catalysts were observed from XRD and XPS analyses. Existence of high percentage MgAl 2 O 4 phase on 5% Mg doped SA catalyst (Mg (5) SA) enhances the dispersion and stabilization of silver phases (Ag 2 O). Mg (5) SA catalyst shows a 51% of high selectivity (NO to N 2 ) in presence of SO 2 (80 ppm) at low temperatures (350°C) and maintained high selectivity's with a wide temperature window (350-500°C). An optimal high surface availability of Ag 0 and Ag ? species were observed from XPS analysis over Mg (5) SA catalyst. H 2 -TPR analysis shows high temperature reduction peak over Mg (5) SA compared to SA catalyst. XPS analysis confirms the high percent availability of MgAl 2 O 4 species over Mg (5) SA catalyst. DRIFTS study reveals the molecular evidences for the evolution of enolic species during NO reduction over the highly active Mg (5) SA catalyst at low temperatures. It also confirms further transformation of enolic species into -NCO species with NO ? O 2 and finally into N 2 and CO 2 .

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Cited by 39 publications

References 9 publications

Influence of Oxygen Mobility over Supported Pt Catalysts on Combustion Temperature of Coke Generated in Propane Dehydrogenation

Influence of Oxygen Mobility over Supported Pt Catalysts on Combustion Temperature of Coke Generated in Propane Dehydrogenation

Propane Dehydrogenation Over PtSn Catalysts Supported on ZnO-Modified MgAl2O4

Influence of Mg Addition on the Catalytic Activity of Alumina Supported Ag for C3H6-SCR of NO

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