Catalytic performance of gallium oxide based-catalysts for the propane dehydrogenation reaction: effects of support and loading amount

Shao, Chuntao; Lang, Wan‐Zhong; Yan, Xi; Guo, Ya‐Jun

doi:10.1039/c6ra27204e

Cited by 106 publications

(66 citation statements)

References 54 publications

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“…30,54 The catalysts were subjected, after the reaction, to various analyses: N 2 -physisorption (BET), thermal gravimetric analysis (TGA) and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). [55][56][57] The obtained results are shown in Table 3. After 60 h of the reaction, H-ZSM-5 300 showed the smallest amount of coke.…”

Section: Resultsmentioning

confidence: 99%

A strategy to convert propane to aromatics (BTX) using TiNp₄ grafted at the periphery of ZSM-5 by surface organometallic chemistry

et al. 2019

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Section: Resultsmentioning

confidence: 99%

A strategy to convert propane to aromatics (BTX) using TiNp₄ grafted at the periphery of ZSM-5 by surface organometallic chemistry

et al. 2019

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“…In Figure 5, two reduction peaks are observed for Ga-NaY and CaGa-NaY, and only one reduction peak is observed for Mg, Sr, and Ba modified Ga-NaY. The two reduction peaks are attributed to the reduction of Ga 3+ to Ga 2+ and Ga 1+ [42]. In the ODH reaction, Ga 1+ is more active then Ga 2+ , [41][42][43][44] hence the single reduction peak for MgGa-NaY, BaGa-NaY, and SrGa-NaY is assigned to the reduction of Ga 3+ to Ga 2+ since these three catalysts were found to be less active than the other two catalysts with two reduction peaks.…”

Section: Pyridine Ft-irmentioning

confidence: 96%

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

2020

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Non-coking stable alkaline earth metal (M = Mg, Sr, and Ba) modified Ga-NaY catalysts were prepared by ionic-exchange and tested in oxidative dehydrogenation (ODH) of n-octane using air as the source of oxygen. The role of the alkaline earth metals in NaY was to poison the acid sites while enhancing the basic sites responsible for ODH. The exception was the calcium modified NaY, which was more acidic than the parent NaY, coking and unstable under the ODH conditions used in this study. The role of gallium was to enhance the dehydrogenation pathway and improve the stability of NaY. The sequence of increasing selectivity to octenes followed the order: CaGa-NaY < Ga-NaY< MgGa-NaY < SrGa-NaY < BaGa-NaY. The highest octene selectivity obtained was 37% at iso-conversion of 6 ± 1% when BaGa-NaY was used at a temperature of 450 °C. The activity of the catalysts was directly proportional to the reducibility of the catalysts, which is in agreement with expectations.

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“…Numerous novel catalyst systems such as Zn, Sn, Co, Ga and carbon based catalysts have been reported for catalyzing PDH,,,,,,,, which are void of shortcomings typical of commercial CrO x and Pt based catalysts. Among them, Zn based materials are found to be one of the most promising catalysts due to the low price, environmental‐friendly‐ness and high catalytic performance in PDH ,,.…”

Section: Introductionmentioning

confidence: 99%

ZnO Nanoclusters Supported on Dealuminated Zeolite β as a Novel Catalyst for Direct Dehydrogenation of Propane to Propylene

et al. 2019

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Small ZnO nanoclusters supported on dealuminated β zeolite were prepared and evaluated for catalyzing direct dehydrogenation of propane to propylene (PDH), exhibiting high catalytic performance. N2 sorption, XRD, TEM, 27Al and 28Si MAS NMR, IR, XRF, DR UV‐vis, XPS, and NH3‐TPD techniques were employed to characterize the physicochemical properties of this novel catalyst system. It is found that the Zn species can be accommodated in the vacant T‐atom sites of dealuminated β zeolite due to the reaction of aqueous zinc acetate solution with silanol groups, and thus, producing massive small ZnO nanoclusters as active phases in PDH. Additionally, dealuminated β zeolite can greatly depress side reactions attributable to the absence of strong acid sites, thereby guaranteeing high catalytic activity, propylene selectivity and stability. As a result, the optimal catalyst of 10 wt% Zn loaded on dealuminated β zeolite exhibits a high initial propane conversion of around 53 % and a superior propylene selectivity of about 93 % at a space velocity of 4000 cm3 gcat−1 h−1, together with the high stability and satisfactory reusability. This study may open a new way to design and synthesize highly active PDH catalysts with high selectivity and stability.

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Catalytic performance of gallium oxide based-catalysts for the propane dehydrogenation reaction: effects of support and loading amount

Abstract: Ga2O3-based catalysts supported on different supports (ZSM-5, SBA-15, γ-Al2O3 and SiO2) were prepared, and the effects of supports and Ga2O3 content (1–9 wt%) on their catalytic performance for the propane dehydrogenation reaction were discussed.

Cited by 106 publications

References 54 publications

A strategy to convert propane to aromatics (BTX) using TiNp₄ grafted at the periphery of ZSM-5 by surface organometallic chemistry

A strategy to convert propane to aromatics (BTX) using TiNp₄ grafted at the periphery of ZSM-5 by surface organometallic chemistry

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

ZnO Nanoclusters Supported on Dealuminated Zeolite β as a Novel Catalyst for Direct Dehydrogenation of Propane to Propylene

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Catalytic performance of gallium oxide based-catalysts for the propane dehydrogenation reaction: effects of support and loading amount

Abstract: Ga2O3-based catalysts supported on different supports (ZSM-5, SBA-15, γ-Al2O3 and SiO2) were prepared, and the effects of supports and Ga2O3 content (1–9 wt%) on their catalytic performance for the propane dehydrogenation reaction were discussed.

Cited by 106 publications

References 54 publications

A strategy to convert propane to aromatics (BTX) using TiNp4 grafted at the periphery of ZSM-5 by surface organometallic chemistry

A strategy to convert propane to aromatics (BTX) using TiNp4 grafted at the periphery of ZSM-5 by surface organometallic chemistry

Effects of Modifying Acidity and Reducibility on the Activity of NaY Zeolite in the Oxidative Dehydrogenation of n-Octane

ZnO Nanoclusters Supported on Dealuminated Zeolite β as a Novel Catalyst for Direct Dehydrogenation of Propane to Propylene

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A strategy to convert propane to aromatics (BTX) using TiNp₄ grafted at the periphery of ZSM-5 by surface organometallic chemistry

A strategy to convert propane to aromatics (BTX) using TiNp₄ grafted at the periphery of ZSM-5 by surface organometallic chemistry