Partial oxidation of methane on neodymium and lanthanium chromate based perovskites for hydrogen production

Roseno, Karina Tamião de Campos; Schmal, Martín; Brackmann, Rodrigo; Alves, Rita M.B.; Giudici, Reinaldo

doi:10.1016/j.ijhydene.2019.02.039

Cited by 22 publications

(4 citation statements)

References 35 publications

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“…In the partial oxidation process, CH 4 (or other hydrocarbons) is reacted with stoichiometric amounts of pure oxygen and yields a H 2 /CO ratio of 2.0 for the produced syngas (Equation ( 10)), which is suitable for Fischer-Tropsch synthesis [139]. However, controlling the reaction selectivity to avoid total combustion can be challenging [140]. Figure 5 presents the thermodynamic equilibrium for POM as a function of temperature for different operating pressures for a stoichiometric feed (CH 4 :O 2 = 2.0, Equation ( 10)).…”

Section: Partial Oxidation Of Methane (Pom)mentioning

confidence: 99%

Prospects and Technical Challenges in Hydrogen Production through Dry Reforming of Methane

2022

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Environmental issues related to greenhouse gases (GHG) emissions have pushed the development of new technologies that will allow the economic production of low-carbon energy vectors, such as hydrogen (H2), methane (CH4) and liquid fuels. Dry reforming of methane (DRM) has gained increased attention since it uses CH4 and carbon dioxide (CO2), which are two main greenhouse gases (GHG), as feedstock for the production of syngas, which is a mixture of H2 and carbon monoxide (CO) and can be used as a building block for the production of fuels. Since H2 has been identified as a key enabler of the energy transition, a lot of studies have aimed to benefit from the environmental advantages of DRM and to use it as a pathway for a sustainable H2 production. However, there are several challenges related to this process and to its use for H2 production, such as catalyst deactivation and the low H2/CO ratio of the syngas produced, which is usually below 1.0. This paper presents the recent advances in the catalyst development for H2 production via DRM, the processes that could be combined with DRM to overcome these challenges and the current industrial processes using DRM. The objective is to assess in which conditions DRM could be used for H2 production and the gaps in literature data preventing better evaluation of the environmental and economic potential of this process.

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Section: Partial Oxidation Of Methane (Pom)mentioning

confidence: 99%

Prospects and Technical Challenges in Hydrogen Production through Dry Reforming of Methane

2022

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“…In 1990, Ashcroft et al 259 tested lanthanide ruthenium oxides as well as Ru supported on Al 2 O 3 and pure RuO 2 at 1050 K and 1 atm. In another paper of Hickman and Schmidt, 267 it is stated that Rh is substantially better than Pt because it produces more H 2 and less H 2 O. de C. Roseno et al 268 prepared perovskite-type mixed oxides LaCrO 3 , La 0.95 Sr 0.05 CrO 3 , and Nd 0.95 CrO 3 by the polymerize complex route which is also known as Pechini's method. Vernon et al 260 performed the POM to the synthesis gas on a series of transition metal catalysts under a number of different conditions.…”

Section: Perovskite Catalysts In Pom For Synthesising Syngasmentioning

confidence: 99%

“…One of the first studies on the simulation of POM in literature was carried out by Hickman and Schmidt, 266 which is focused on direct oxidation of methane over alumina foam monoliths coated with high Pt and Rh loads that were simulated using 19 major steps of adsorption, desorption, and surface reaction. In another paper of Hickman and Schmidt, 267 it is stated that Rh is substantially better than Pt because it produces more H 2 and less H 2 O. de C. Roseno et al 268 prepared perovskite-type mixed oxides LaCrO 3 , La 0.95 Sr 0.05 CrO 3 , and Nd 0.95 CrO 3 by the polymerize complex route which is also known as Pechini's method. The authors aimed to assess the influence of nonstoichiometry and the nature of site A on the catalytic properties of the POM.…”

Section: Perovskite Catalysts In Pom For Synthesising Syngasmentioning

confidence: 99%

Perovskite catalysts for methane combustion: applications, design, effects for reactivity and partial oxidation

Başhan

Üst

2019

Int J Energy Res

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Summary This review underlines the importance of the developments in perovskite catalysts for methane combustion from the past up to the present. In this review, after a general and brief introduction to perovskites, the mechanisms of catalytic combustion of methane have been included. Moreover, current studies on perovskites have been summarized including the effects of substitutions, doped perovskites, perovskite preparation methods, and the effect of sulfur presence on perovskite catalysts. Besides, recent studies on perovskite oxides and phenomenon of oxygen (O2) deficiency, porous perovskite oxides, and nanostructured perovskites have been conducted. In addition, partial oxidation of methane (POM) has been reviewed. The loss of active component during the POM reaction can take place in the nickel catalyst, in particular. Since nickel has a lower melting point than noble metals and other active components, such as Co and Fe, in general, to deactivate nickel is easier. Compared with conventional structure, the porous structure with the unique morphology significantly enhances the catalytic activity through a much larger surface area (SA) and greater reactivity of the active sites. Furthermore, the monolithic nanoarrayed perovskite presents very good results in well‐defined faceted catalysts and takes part in porous channel hydrocarbon combustion. This review study is prepared as a guide to cover the profound knowledge of perovskite oxides catalysts, considering the methane combustion reaction mechanisms, and addresses prospective studies in this field for researchers.

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“…LaCrO3 showed low CH4 conversion up to 16% at 850 o C with 55% CO selectivity[136].However, Ru addition improved CH4 conversion up to 100% with 65% CO selectivity due to RuO2 presence. Similarly, 35% CH4 conversion of Nd0.95CrO3 was reported indicating poor Cr performance as perovskite B-site holder[140].In summary, there have been several metals studied for perovskites B-site occupants.Nevertheless, only a few were found to be highly active in POM. There was no surprise that high conversion and syngas selectivity (>90%) were achieved on perovskites with Ni, Co and Rh in B-site.…”

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confidence: 97%

Catalytic partial oxidation of methane to syngas: review of perovskite catalysts and membrane reactors

Elbadawi

et al. 2020

Catalysis Reviews

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Partial oxidation of methane (POM) offers a promising option to produce syngas for downstream processes such as hydrogen production and Fischer-Tropsch processes. POM in fixed-bed reactors requires an oxygen separation plant with high operation cost and safety risks.On the contrary, membrane reactors can provide an improved process by integrating both oxygen separation and catalytic reaction processes. With many advantages including high purity and efficient oxygen separation from the air at the catalytic reaction conditions, mixed ionic-electronic conducting membranes (MIEC) caught great attention in the scientific research field over the past two decades. In this review, POM using different catalysts in fixed-bed reactors was firstly summarised with emphasizing on perovskite-based catalysts, and then the material screening of MIEC membrane reactors was introduced and linked to the selection of conventional and perovskite catalysts. The catalytic activity, reaction mechanisms, and emerging challenges have been analyzed. Furthermore, future research directions have been outlined by highlighting the effect of electronic properties, continuous reduction-oxidation in the presence of oxygen flux, and chemical reaction mechanism on membrane/catalyst.

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Partial oxidation of methane on neodymium and lanthanium chromate based perovskites for hydrogen production

Cited by 22 publications

References 35 publications

Prospects and Technical Challenges in Hydrogen Production through Dry Reforming of Methane

Prospects and Technical Challenges in Hydrogen Production through Dry Reforming of Methane

Perovskite catalysts for methane combustion: applications, design, effects for reactivity and partial oxidation

Catalytic partial oxidation of methane to syngas: review of perovskite catalysts and membrane reactors

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