Copper based materials for water-gas shift equilibrium displacement

Moreira, Miguel N.; Ribeiro, Ana M.; Cunha, Adelino F.; Rodrigues, Alı́rio E.; Zabilskiy, Maxim; Djinović, Petar; Pintar, Albin

doi:10.1016/j.apcatb.2016.02.046

Cited by 23 publications

(6 citation statements)

References 69 publications

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“…29 This type of material was chosen as the catalyst support because it is known to be a good carbon dioxide sorbent at moderate temperatures (200-450 C) and is used for many catalytic reactions. 25,30 The materials used in this work were named according to the support material, i.e., depending on if it is a commercial hydrotalcite-like compound, and the percentages of each phase/ compound loaded. The acronym LDH stands for layered double hydroxide.…”

Section: Catalyst Synthesismentioning

confidence: 99%

Syngas production by bi-reforming methane on an Ni–K-promoted catalyst using hydrotalcites and filamentous carbon as a support material

et al. 2020

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Section: Catalyst Synthesismentioning

confidence: 99%

Syngas production by bi-reforming methane on an Ni–K-promoted catalyst using hydrotalcites and filamentous carbon as a support material

et al. 2020

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“…Moreira et al studied the sorption enhanced WGS reaction at low-temperature (125-295°C) over Cu-CeO 2 / HTlc catalysts, where they reported a 70% volume enrichment in hydrogen and improved CO conversion upon efficient removal of CO 2 from the effluent stream [84]. Cu supported on nanoparticles size polyhedral ceria, with 87.6% CO conversion, was found to have the highest activity in comparison to other catalysts reported in this work [84].…”

Section: Transition Metal Catalystsmentioning

confidence: 66%

“…Camara et al investigated the low-temperature WGSR mechanism on CeO 2 /Cu catalysts using operando SSITKA-DRIFTS-mass spectrometry, where they identified a specific type of carbonate intermediate (bi or tridentate), which was believed to be the rate-limiting intermediate controlling the formation of CO 2 [83]. Moreira et al studied the sorption enhanced WGS reaction at low-temperature (125-295°C) over Cu-CeO 2 / HTlc catalysts, where they reported a 70% volume enrichment in hydrogen and improved CO conversion upon efficient removal of CO 2 from the effluent stream [84]. Cu supported on nanoparticles size polyhedral ceria, with 87.6% CO conversion, was found to have the highest activity in comparison to other catalysts reported in this work [84].…”

Section: Transition Metal Catalystsmentioning

confidence: 99%

A review of recent advances in water-gas shift catalysis for hydrogen production

2020

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The water-gas shift reaction (WGSR) is an intermediate reaction in hydrocarbon reforming processes, considered one of the most important reactions for hydrogen production. Here, water and carbon monoxide molecules react to generate hydrogen and carbon dioxide. From the thermodynamics aspect, pressure does not have an impact, whereas low-temperature conditions are suitable for high hydrogen selectivity because of the exothermic nature of the WGSR reaction. The performance of this reaction can be greatly enhanced in the presence of suitable catalysts. The WGSR has been widely studied due do the industrial significance resulting in a good volume of open literature on reactor design and catalyst development. A number of review articles are also available on the fundamental aspects of the reaction, including thermodynamic analysis, reaction condition optimization, catalyst design, and deactivation studies. Over the past few decades, there has been an exceptional development of the catalyst characterization techniques such as near-ambient x-ray photoelectron spectroscopy (NA-XPS) and in situ transmission electron microscopy (in situ TEM), providing atomic level information in presence of gases at elevated temperatures. These tools have been crucial in providing nanoscale structural details and the dynamic changes during reaction conditions, which were not available before. The present review is an attempt to gather the recent progress, particularly in the past decade, on the catalysts for lowtemperature WGSR and their structural properties, leading to new insights that can be used in the future for effective catalyst design. For the ease of reading, the article is divided into subsections based on metals (noble and transition metal), oxide supports, and carbon-based supports. It also aims at providing a brief overview of the reaction conditions by including a table of catalysts with synthesis methods, reaction conditions, and key observations for a quick reference. Based on our study of literature on noble metal catalysts, atomic Pt substituted Mn 3 O 4 shows almost full CO conversion at 260°C itself with zero methane formation. In the case of transition metals group, the inclusion of Cu in catalytic system seems to influence the CO conversion significantly, and in some cases, with CO conversion improvement by 65% at 280°C. Moreover, mesoporous ceria as a catalyst support shows great potential with reports of full CO conversion at a low temperature of 175°C.

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“…The γ-alumina (γ-Al2O3) containing Cu also is efficient and very used as supports at industrial applications due their high specific areas. However, the improvement of copper-based catalytic system is highly required [18,19,24]. Therefore, due to the technological importance of catalysts to hydrogen production for the generation of energy, the aim of this work is to determine aspects and properties textural, morphologic and structural of the Cu/Al 2 O 3 and Cu/TiO 2 catalysts with the following analyses XRD, SEM, BET and FTIR.…”

Section: Introductionmentioning

confidence: 99%

Study of the structural and morphological properties of copper catalysts supported on Al2O3 and TiO2 synthesized by the impregnation method

Queiroz¹,

Barbosa²

2019

Matéria (Rio J.)

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Aluminum oxide and titanium oxide are widely used as catalytic support. Due to their characteristics and properties, they have several applications such as chemical processes, photocatalysis and pollution control. In this work, the catalytic supports of Al 2 O 3 and TiO 2 were impregnated with 2% of copper oxide by the method of impregnation. The catalysts were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Telle (BET) surface area and Infrared Spectroscopy techniques (FTIR). The results of XRD analysis presented the Cu/TiO 2 catalyst with high degree of crystallinity where the peaks corresponding to the phases anatase, rutile and CuO are easily found, while the Cu/Al 2 O 3 catalyst presented low degree of crystallinity. The samples morphology is in the form of agglomeration, the specific surface area was higher when copper metal was impregnated to the supports and the highest values was obtained with Cu/Al 2 O 3 catalyst. FTIR analysis allowed the visualization of the main vibrations of the functional groups presents in the catalysts samples. According to the results, it was observed that the incorporation of copper oxide did not affect significantly the crystalline structure of TiO 2 and Al 2 O 3 and that at the calcination temperature of 500°C it is possible to obtain a high specific surface area and a more active phase resulting in a good characterization which is suitable for various industrial applications.

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Copper based materials for water-gas shift equilibrium displacement

Cited by 23 publications

References 69 publications

Syngas production by bi-reforming methane on an Ni–K-promoted catalyst using hydrotalcites and filamentous carbon as a support material

Syngas production by bi-reforming methane on an Ni–K-promoted catalyst using hydrotalcites and filamentous carbon as a support material

A review of recent advances in water-gas shift catalysis for hydrogen production

Study of the structural and morphological properties of copper catalysts supported on Al2O3 and TiO2 synthesized by the impregnation method

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