Performance of PtSn catalysts supported on MAl2O4 (M: Mg or Zn) in n-butane dehydrogenation: characterization of the metallic phase

Guerrero-Ruı́z, A.; Miguel, Sergio R. de; Scelza, Osvaldo A.

doi:10.1016/j.apcata.2004.08.016

Cited by 111 publications

(46 citation statements)

References 20 publications

(41 reference statements)

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“…[50][51][52][53][54][55] To test this hypothesis, we constructed plots showing the relationship between surface-normalized catalysta cidity and the rate constants of coke formation k coke (m) (Figure 6a)a nd catalyst deactivation k deac (Figure 6b). Despite the fact that most acidic 3V/ Al 2 O 3 and 13 V/S10 deactivated faster than all other catalysts, no general correlation for all tested catalysts could be discerned.…”

Section: Factors Governing Cokeformation and On-stream Stabilitymentioning

confidence: 99%

Effect of VO_x Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

et al. 2015

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VOx/SiO2–Al2O3 catalysts were prepared by grafting vanadyl acetylacetonate onto the supports with a SiO2 content between 0 and 100 wt. %. The degree of polymerization of VOx species and acidity both of pristine supports and the catalysts were evaluated. To determine their on‐stream stability and carbon deposition activity in nonoxidative propane dehydrogenation, continuous‐flow tests and in situ thermogravimetric measurements were performed. The rate constants of catalyst deactivation and carbon deposition were derived from kinetic evaluation of these experiments. Gathered experimental evidence pointed out that VOx species were significantly more active for coke formation than acid sites of the supports. The rate constant of carbon formation was found to increase with the degree of polymerization of VOx species, whereas no correlation between catalyst acidity and the rate constants of coking or deactivation could be drawn.

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Section: Factors Governing Cokeformation and On-stream Stabilitymentioning

confidence: 99%

Effect of VO_x Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

et al. 2015

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“…MgAl 2 O 4 and ZnAl 2 O 4 have characteristic of thermal stability, high mechanical strength, low surface acidity, which can be better adapted to low-carbon alkane dehydrogenation process of severe reaction conditions [18,19]. 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.…”

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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“…Pt를 근간으로 한 촉매의 경우 사용되는 지지체의 종류로는 Al2O3 [6][7][8][9], 제올라이트 [10], SBA-15 [11,12], MgAl2O4, ZnAl2O4 [13,14] 등이 있으며 증진제 로 [15,16] …”

Section: 소부틸렌은 폴리부텐 연료첨가제인 Mtbe (Methyl Tertiaryunclassified

Effect of Reaction Conditions for n-Butane Dehydrogenation over Pt-Sn/θ-Al₂O₃Catalyst

Cho¹,

Kang²,

Park³

et al. 2012

Clean Technology

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주제어 : n-부탄, 탈수소화반응, Pt-Sn/θ-Al2O3, 부탄 반응차수, 수소반응차수 Abstract : Pt-Sn/θ-Al2O3 catalyst for n-butane dehydrogenation reaction was prepared by incipient wetness method. To confirm the physicochemical properties of Pt-Sn/θ-Al2O3 catalyst, the characterization was performed using X-ray diffraction (XRD), N2 sorption analysis, temperature programmed desorption of NH3 (NH3-TPD), temperature programmed reduction of H2 (H2-TPR) techniques. Also, the catalytic activities of Pt-Sn/θ-Al2O3 for n-butane dehydrogenation was tested as a function of pretreatment temperature, pretreatment time, reaction temperature, and the partial pressure of n-butane and hydrogen. The sum of selectivities to n-butenes consisting of 1-butene, cis-2-butene, and trans-2-butene was almost constant 95% in the range of conversion of n-butane 5-55%. The activation energy calculated from Arrhenius equation was 84 kJ mol -1 and the reaction orders of n-butane and hydrogen from Power's law were 0.70 and -0.20, respectively.

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Performance of PtSn catalysts supported on MAl2O4 (M: Mg or Zn) in n-butane dehydrogenation: characterization of the metallic phase

Cited by 111 publications

References 20 publications

Effect of VO_x Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

Effect of VO_x Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

Propane Dehydrogenation Over PtSn Catalysts Supported on ZnO-Modified MgAl2O4

Effect of Reaction Conditions for n-Butane Dehydrogenation over Pt-Sn/θ-Al₂O₃Catalyst

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Performance of PtSn catalysts supported on MAl2O4 (M: Mg or Zn) in n-butane dehydrogenation: characterization of the metallic phase

Cited by 111 publications

References 20 publications

Effect of VOx Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

Effect of VOx Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

Propane Dehydrogenation Over PtSn Catalysts Supported on ZnO-Modified MgAl2O4

Effect of Reaction Conditions for n-Butane Dehydrogenation over Pt-Sn/θ-Al2O3Catalyst

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Effect of VO_x Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

Effect of VO_x Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

Effect of Reaction Conditions for n-Butane Dehydrogenation over Pt-Sn/θ-Al₂O₃Catalyst