Dehydrogenation of propane over In2O3–Al2O3 mixed oxide in the presence of carbon dioxide

Chen, Miao; Xu, Jie; Cao, Yong; He, Heyong; Fan, Kangnian; Zhuang, Jun

doi:10.1016/j.jcat.2010.03.007

Cited by 115 publications

(40 citation statements)

References 35 publications

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“…[7,8] Previous studies have been focused on supported vanadium oxide [9][10][11][12] and molybdenum oxide [13][14][15][16] catalysts. Although many attempts have been made to modify the catalyst formula, [17,18] and to select mild oxidants, [19][20][21] oxidation reactions inevitably occur, leading to increased formation of CO x and inferior selectivity toward alkenes. [22,23] Consequently, it is difficult to make a significant breakthrough in this route.…”

Section: Introductionmentioning

confidence: 99%

Isobutane Dehydrogenation over Metal (Fe, Co, and Ni) Oxide and Sulfide Catalysts: Reactivity and Reaction Mechanism

Wang

Gao²,

Zhu

et al. 2014

ChemCatChem

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Silica‐supported metal oxide and sulfide catalysts of Fe, Co, and Ni were evaluated comparatively for the catalytic dehydrogenation of isobutane. The results of the activity test and temperature‐programmed reduction of hydrogen characterization indicate that metal oxides, except Fe2O3, are easily reduced to metal ensembles, which are extremely active for alkane hydrogenolysis and lead to the formation of a considerable amount of methane and coke. However, the dehydrogenation performance was significantly improved after sulfidation treatment. The introduction of sulfur affects the catalysts in two ways: one is the geometric effect, which dilutes the aggregated metallic species and reduces hydrogenolysis activity, and the other is the electronic effect, which facilitates the desorption of olefin and increases the product selectivity. Moreover, the reaction mechanism is explored by using the proposed model of the interaction between isobutane and sulfide catalysts. Finally, sulfur loss and partial coke deposition are determined to be the main reasons for catalyst deactivation.

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Section: Introductionmentioning

confidence: 99%

Isobutane Dehydrogenation over Metal (Fe, Co, and Ni) Oxide and Sulfide Catalysts: Reactivity and Reaction Mechanism

Wang

Gao²,

Zhu

et al. 2014

ChemCatChem

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“…The support materials, Al 2 O 3 [11], SiO 2 [6], ZrO 2 [12,13] and zeolite [3,14], can also affect catalytic performance on account of the significant differences in textural properties. Especially, the Mg(Al)O (c) by-product selectivity (reduction conditions: T = 600 °C, t = 2.5 h; reaction conditions: T = 600 °C, weight hourly space velocity (WSHV) = 3 h −1 , atmospheric pressure in the gas mixture of C3H8:H2:N2 molar ratio = 8:7:35; reaction time: 30 h for H2/N2 and 14 vol % H2/N2 reduced catalyst, 26 h for C3H8/H2/N2-reduced catalyst, 17 h for C3H8 and CO-reduced catalyst).…”

Section: Introductionmentioning

confidence: 99%

Effect of Reduction Atmosphere on Structure and Catalytic Performance of PtIn/Mg(Al)O/ZnO for Propane Dehydrogenation

et al. 2020

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The effect of reduction atmospheres, H2/N2, C3H8/H2/N2, C3H8 and CO, on the structure and propane direct dehydrogenation performance of PtIn/Mg(Al)O/ZnO catalyst derived from ZnO-supported PtIn-hydrotalcite was studied. The physicochemical properties of the as-prepared and used catalytic system were characterized by various characterization methods. The results show that the dehydrogenation performance, especially the stability of the PtIn/Mg(Al)O/ZnO catalyst, was significantly improved along with the change in reduction atmosphere. The highest catalytic activity (51% of propane conversion and 97% propylene selectivity), resistance toward coke deposition, and stability for more than 30 h were achieved with the H2/N2-reduced catalyst. The optimal dehydrogenation performance and coke resistance are mainly related to the high Pt dispersion and In0/In3+ molar ratio, strong Pt–In interaction and small metal particle size, depending on the nature of the reduction atmospheres. The reconstruction of meixnerite favors the stability and coke resistance to some extent.

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“…However, there are several open issues for this Pt-based catalyst under reaction conditions [3,7,8], such as Pt sintering, carbon deposition and propane cracking. Extensive research efforts have been made to inhibit deactivation and improve propene selectivity of Pt-based catalysts by doping promoters of Sn [9,10], In [11,12], Ga [13,14] and Cu [15] to form bimetallic catalysts. For example, Pt-In [16] and Pt-Ga [17,18] bimetallic nanoparticles (NPs) supported on calcined hydrotalcites (HT) show higher activity and selectivity in PDH, which has been attributed to the increased Pt dispersion and electron transfer from In or Ga to Pt [11,18].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical PtIn/Mg(Al)O Derived from Reconstructed PtIn-hydrotalcite-like Compounds for Highly Efficient Propane Dehydrogenation

Zhang

Song

et al. 2019

Catalysts

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The challenges facing propane dehydrogenation are to solve the Pt sintering and carbon deposition. This paper provides a new way to disperse and stabilize Pt species and resist carbon deposition. Highly dispersed Pt species were topologically transformed from reconstructed PtIn-hydrotalcite-like precursors in a flower-like hierarchical microstructure. The lattice confinement of reconstructed hydrotalcite-like precursor is in favor of stabilizing the highly dispersed Pt species, and the hierarchical microstructure is an important factor to prolong its lifetime by enhancing tolerance to carbon deposition. In propane dehydrogenation, the propene selectivity decreases in the sequences of catalyst in flower-like > single-plate > block mass with small, flakeys. A propene selectivity of >97% with a conversion of 48% at 600 °C has been achieved over a flower-like PtIn/Mg(Al)O catalyst. Additionally, no visible Pt sintering can even be observed on this catalyst after a reaction time of 190 h. This strategy provides an effective and feasible alternative for the facile preparation of highly dispersed metal catalysts.

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Dehydrogenation of propane over In2O3–Al2O3 mixed oxide in the presence of carbon dioxide

Cited by 115 publications

References 35 publications

Isobutane Dehydrogenation over Metal (Fe, Co, and Ni) Oxide and Sulfide Catalysts: Reactivity and Reaction Mechanism

Isobutane Dehydrogenation over Metal (Fe, Co, and Ni) Oxide and Sulfide Catalysts: Reactivity and Reaction Mechanism

Effect of Reduction Atmosphere on Structure and Catalytic Performance of PtIn/Mg(Al)O/ZnO for Propane Dehydrogenation

Hierarchical PtIn/Mg(Al)O Derived from Reconstructed PtIn-hydrotalcite-like Compounds for Highly Efficient Propane Dehydrogenation

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