PtSnNa/SUZ-4: An efficient catalyst for propane dehydrogenation

Zhou, Hualan; Gong, Jingjing; Xu, Bo; Deng, Shengcai; Ding, Yuanhua; Yu, Lei; Fan, Yining

doi:10.1016/s1872-2067(17)62750-5

Cited by 29 publications

(15 citation statements)

References 37 publications

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“…Pt alloys or binary compounds with one of these elements, results in average in higher Pt dispersion, with smaller atomic clusters that have lower or no activity toward C–C cleavage. The incorporation of other metals, for example, Sn, ,,− In, ,,,,− and/or additives like K ,, and Na, ,,, has become a common procedure, as it has been proven to confer superior stability to the catalyst.…”

Section: Catalysis Of Lohc Dehydrogenationmentioning

confidence: 99%

High-Purity Hydrogen Generation via Dehydrogenation of Organic Carriers: A Review on the Catalytic Process

et al. 2018

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High-purity hydrogen delivery for stationary and mobile applications using fuel cells is a subject of rapidly growing interest. As a consequence, the development of efficient storage technologies and processes for hydrogen supply is of primary importance. Promising hydrogen storage techniques rely on the reversibility and high selectivity of liquid organic hydrogen carriers (LOHCs), for example, methylcyclohexane, decalin, dibenzyltoluene, or dodecahydrocabazole. LOCHs have high gravimetric and volumetric hydrogen density, and they involve low risk and capital investment because they are largely compatible with the current transport infrastructure used for fossil fuels. A further advantage comes from the high purity (close to 100%) of the hydrogen generated by dehydrogenation, suitable to directly feed fuel cells without the need for bulky purification modules. Partial dehydrogenation (PDH) of liquid fuels has recently emerged as a transition technology for hydrogen delivery purposes. The principle is to extract from fossil fuels a small fraction of the available hydrogen, which can be used for fuel cell applications, while the dehydrogenated hydrocarbon mixture maintains suitable properties for its use as fuel. With this technology, the large energy demand of dehydrogenation processes can be satisfied by implementing a heat exchanger between the engine and the dehydrogenation reactor, overcoming one of the main constraints associated with the use of organic liquids as hydrogen carriers. This method qualifies itself as a transition technology toward more electrified transportations, in which the main propulsion is still obtained by fuel combustion, although the electrical utilities or auxiliary propulsion are powered by fuel cells. This paper provides a review of the effort that has been directed toward the utilization of organic liquids as hydrogen carriers, with particular focus on the design of the catalytic dehydrogenation process and on the recent approach of fuel partial dehydrogenation.

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Section: Catalysis Of Lohc Dehydrogenationmentioning

confidence: 99%

High-Purity Hydrogen Generation via Dehydrogenation of Organic Carriers: A Review on the Catalytic Process

et al. 2018

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“…For 240 h time-on-stream at 550 °C, the conversion decreases at the rate of only 0.0067% h -1 , which is suggestive of a very promising PDH catalyst. Furthermore, a number of supported Pt-Sn catalysts (such as Pt-Sn/Al2O3 [56,57,76], PtSn/Al2O3/SBA-15 [65,66,77], PtSnNa@SUZ-4 [78,79], and Pt-Sn/SiO2 [80]) have been synthesized and used in PDH. The utilization of Sn as a promoter can greatly improve the activity, stability, and anti-coking capability of Pt-based catalysts.…”

Section: Effect Of Promoters On Pt-based Catalystsmentioning

confidence: 99%

State-of-the-art catalysts for direct dehydrogenation of propane to propylene

Yang

Wang

et al. 2019

Chinese Journal of Catalysis

182

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“…The main drawback of Cr catalysts is the environmental impact, which tends to decrease its usage [6][7][8][9]. In other words, Pt catalysts are known to promote the PDH reaction in the presence of co-metals [10][11][12][13][14] and refined supports [15][16][17][18][19]. The PDH reaction is performed at high temperatures (over 550 • C), leading to unfavorable coke formation on the surface of the catalysts [20][21][22], which causes deactivation.…”

Section: Introductionmentioning

confidence: 99%

Regeneration of Pt-Sn/Al2O3 Catalyst for Hydrogen Production through Propane Dehydrogenation Using Hydrochloric Acid

Choi

Jung

et al. 2020

Catalysts

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Compared with dehydrogenation in conventional petroleum refinery processes, relatively pure hydrogen can be produced by propane dehydrogenation (PDH) without innate contaminants like sulfur and metals. Among the existing catalysts for PDH, Pt catalysts are popular and are often used in conjunction with Sn as a co-catalyst. Coke formation is a major concern in PDH, where catalyst regeneration is typically achieved by periodic coke burning to achieve sustainable operation. In this study, Pt-Sn/Al2O3 catalysts were regenerated after coke burning in three stages: mixing the catalyst with liquid hydrochloric acid, drying, and calcining under air atmosphere. In this process, the optimum concentration of hydrochloric acid was found to be 35% w/w. HCl treatment was effective for enhancing redispersion of the metal catalysts and aiding the formation of the Pt3Sn alloy, which is considered to be effective for PDH reaction. HCl treatment may provide oxychlorination-like conditions under the calcination atmosphere. The characteristics of the catalysts were examined by X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS), and CO chemisorption.

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PtSnNa/SUZ-4: An efficient catalyst for propane dehydrogenation

Cited by 29 publications

References 37 publications

High-Purity Hydrogen Generation via Dehydrogenation of Organic Carriers: A Review on the Catalytic Process

High-Purity Hydrogen Generation via Dehydrogenation of Organic Carriers: A Review on the Catalytic Process

State-of-the-art catalysts for direct dehydrogenation of propane to propylene

Regeneration of Pt-Sn/Al2O3 Catalyst for Hydrogen Production through Propane Dehydrogenation Using Hydrochloric Acid

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