Hydrogen generation via catalytic partial dehydrogenation of gasoline and diesel fuels

Gianotti, Elia; Taillades-Jacquin, Mélanie; Reyes-Carmona, Álvaro; Taillades, Gilles; Rozière, Jacqués; Jones, Deborah J.

doi:10.1016/j.apcatb.2015.12.015

Cited by 18 publications

(11 citation statements)

References 20 publications

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“…8 As a side product, hydrogen is also produced. 9,10 Propane valorisation represents a technological challenge due to the inertness of the reactant and quick deactivation of the catalyst. 11 In non-oxidative dehydrogenation, hydrogen and light olefins are formed in a very endothermic reaction.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of non-oxidative propane dehydrogenation on Cr2O3 and the nature of catalyst deactivation from first-principles simulations

Huš

Kopač

Likozar

2020

Journal of Catalysis

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Section: Introductionmentioning

confidence: 99%

Kinetics of non-oxidative propane dehydrogenation on Cr2O3 and the nature of catalyst deactivation from first-principles simulations

Huš

Kopač

Likozar

2020

Journal of Catalysis

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“… 2 − 6 By utilizing propane as a feedstock, which represents a more prudent use than burning it as fuel, hydrogen is produced when the process is carried out non-oxidatively. 7 , 8 However, the high temperatures required due to the endothermicity of the reaction render it less economical. Alternatively, dehydrogenation can be performed with oxidants, such as air, oxygen, N 2 O, or CO 2 , releasing hydrogen as water in a strongly exothermic reaction.…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Oxidation on Oxidative Propane Dehydrogenation over Chromia: An Ab Initio Multiscale Kinetic Study

et al. 2021

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An increasingly utilized way for the production of propene is propane dehydrogenation. The reaction presents an alternative to conventional processes based on petroleum resources. In this work, we investigate theoretically how Cr 2 O 3 catalyzes this reaction in oxidative and reducing environments. Although previous studies showed that the reduced catalyst is selective for the non-oxidative dehydrogenation of propane, real operating conditions are oxidative. Herein, we use multiscale modeling to investigate the difference between the oxidized and reduced catalyst and their performance. The complete reaction pathway for propane dehydrogenation, including C–C cracking, formation of side products (propyne, ethane, ethylene, acetylene, and methane), and catalyst coking on oxidized and reduced surfaces of α-Cr 2 O 3 (0001), is calculated using density functional theory with the Hubbard correction. Parameters describing adsorption, desorption, and surface reactions are used in a kinetic Monte Carlo simulation, which employed industrially relevant conditions (700–900 K, pressures up to 2 bar, and varying oxidants: N 2 O, O 2 , and none). We observe that over the reduced surface, propene and hydrogen form with high selectivity. When oxidants are used, the surface is oxidized, which changes the reaction mechanism and kinetics. During a much faster reaction, H 2 O forms as a coproduct in a Mars–van Krevelen cycle. Additionally, CO 2 is also formed, which represents waste and adversely affects the selectivity. It is shown that the oxidized surface is much more active but prone to the formation of CO 2 , while the reduced surface is less active but highly selective toward propene. Moreover, the effect of the oxidant used is investigated, showing that N 2 O is preferred to O 2 due to higher selectivity and less catalyst coking. We show that there exists an optimum degree of surface oxidation, where the yield of propene is maximized. The coke, which forms during the reaction, can be burnt away as CO 2 with oxygen.

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“…Soares obtained H 2 production by glycerol APR over Pt x -Fe y /γ-Al 2 O 3 catalysts at low temperature . Elia Gianotti found that partial dehydrogenation of fuels is a promising method to obtain high-purity hydrogen, which can feed a fuel-cell-based power unit . Numerous researchers have also explored hydrogen production via steam reforming of ethanol , or acetic acid .…”

Section: Introductionmentioning

confidence: 99%

“…7 Elia Gianotti found that partial dehydrogenation of fuels is a promising method to obtain high-purity hydrogen, which can feed a fuel-cell-based power unit. 8 Numerous researchers have also explored hydrogen production via steam reforming of ethanol 9,10 or acetic acid. 11 During the process, catalysts play an important role.…”

Section: Introductionmentioning

confidence: 99%

Influence of Mixed Supports on the Steam Catalytic Reforming of Wood Vinegar

Jiang

2017

Energy Fuels

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Obtaining hydrogen from renewable energy is a novel method. Instead of single support catalysts, mixed zeolite supports were used in this study to obtain hydrogen by steam catalytic reforming of wood vinegar. This technique improves the activity and extends the life of catalysts. The results show that, compared with a single support catalyst, mixed supports are beneficial for improving H2 concentration and anticarbon ability. H2 content and yield increased from 54.77% to 60.32% and 18.91 mg/g sample to 22.47 mg/g sample, respectively, when γ-Al2O3 mixed MCM-41 supports were used instead of single γ-Al2O3. Moreover, the amount of carbon deposition significantly decreased from 9.79% to 5.85%. The admixture of support γ-Al2O3 with MCM-41 optimized the diversity of acidic intensity, structure, pore characteristics, and heat and mass transfer ability of mixed catalysts, and improved the reactivity and resistance to carbon deposition of catalysts.

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Hydrogen generation via catalytic partial dehydrogenation of gasoline and diesel fuels

Cited by 18 publications

References 20 publications

Kinetics of non-oxidative propane dehydrogenation on Cr2O3 and the nature of catalyst deactivation from first-principles simulations

Kinetics of non-oxidative propane dehydrogenation on Cr2O3 and the nature of catalyst deactivation from first-principles simulations

Effect of Surface Oxidation on Oxidative Propane Dehydrogenation over Chromia: An Ab Initio Multiscale Kinetic Study

Influence of Mixed Supports on the Steam Catalytic Reforming of Wood Vinegar

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