New concept for old reaction: Novel WGS catalyst design

García-Moncada, Nuria; González‐Castaño, Miriam; Ivanova, Svetlana; Romero-Sarria, Francisca; Odriozola, J.A.

doi:10.1016/j.apcatb.2018.06.068

Cited by 41 publications

(13 citation statements)

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“…The promoter effect of a Zr-based proton conductor physically mixed with a typical Pt-based catalyst has been demonstrated previously in our group [18][19][20]. These materials present oxygen vacancies capable of providing dissociated water and labile OH − species which enhance the proton conductivity and, therefore, the CO conversion.…”

Section: Introductionmentioning

confidence: 79%

Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction

et al. 2018

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A kinetic study of the water gas shift (WGS) reaction has been carried out on a Pt-based catalyst promoted by a Zr-based proton conductor. The investigation was first performed on powders with diluted feed mixtures and then extended to more severe and representative conditions by using a catalyst coated metallic micromonolith. Temperature measurements reveal that isothermal conditions were obtained along the micromonolith during the tested conditions. In addition, the very thin catalytic layer allows for the discarding of intraporous resistances, providing excellent conditions to analyse the kinetics of the WGS reaction under the integral regime. The proposed rate expression accounts for independence on CO concentration, an inhibiting effect of H2 and a promoting effect of H2O; kinetic orders on CO and H2 are in line with those reported in the literature for the Pt-based catalyst. Instead, the obtained reaction order of water (0.36) is significantly lower than that reported for unpromoted catalysts (typically 0.77–1.10) in good agreement with the proposed water-enhancer effect of the proton conductor on the rate-limiting step. Metallic micromonoliths turn out to be a powerful tool for the kinetic investigation, due to the absence of mass and heat transport limitations and represent a strategy for the intensification of the WGS unit for future applications of fuel processors in small mobile devices.

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Section: Introductionmentioning

confidence: 79%

Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction

et al. 2018

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“…This is why it is mainly used as a biofuel. Besides this, there are investigations into the use of biomass as a raw material for hydrogen production from biomass gasification [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Influence of Raw Material Drying Temperature on the Scots Pine (Pinus sylvestris L.) Biomass Agglomeration Process—A Preliminary Study

et al. 2020

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For biomass compaction, it is important to determine all aspects of the process that will affect the quality of pellets and briquettes. The low bulk density of biomass leads to many problems in transportation and storage, necessitating the use of a compaction process to ensure a solid density of at least 1000 kg·m−3 and bulk density of at least 600 kg·m−3. These parameters should be achieved at a relatively low compaction pressure that can be achieved through the proper preparation of the raw material. As the compaction process includes a drying stage, the aim of this work is to determine the influence of the drying temperature of pine biomass in the range of 60–140 °C on the compaction process. To determine whether this effect is compensated by the moisture, compaction was carried out on the material in a dry state and on the materials with moisture contents of 5% and 10% and for compacting pressures in the 130.8–457.8 MPa range. It was shown that drying temperature affects the specific density and mechanical durability of the pellets obtained from the raw material in the dry state, while an increase in the moisture content of the raw material neutralizes this effect.

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“…A general conclusion derived from the numerous studies accomplished is the synergy existing between the active phase and the support [9][10][11][12]. The latter is involved in the activation of the water molecule, generally recognized as the rate-limiting step of the WGS reaction [13][14][15]. Both reducible and non-reducible oxide-type supports have been extensively studied for the WGS reaction [3,7,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Afterwards, García-Moncada et al [13,20] introduced the use of a physical mixture of protonic conductors to a typical Pt/CeAl catalyst, generated by aliovalent doping of transition or rare earth metal oxides, which improves the WGS catalytic performance through a proton conduction mechanism, promoting the water dissociation step.…”

Section: Introductionmentioning

confidence: 99%

Pt/CePO₄catalysts for the WGS reaction: influence of the water-supplier role of the support on the catalytic performance

2018

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New concept for old reaction: Novel WGS catalyst design

Cited by 41 publications

References 41 publications

Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction

Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction

Influence of Raw Material Drying Temperature on the Scots Pine (Pinus sylvestris L.) Biomass Agglomeration Process—A Preliminary Study

Pt/CePO₄catalysts for the WGS reaction: influence of the water-supplier role of the support on the catalytic performance

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New concept for old reaction: Novel WGS catalyst design

Cited by 41 publications

References 41 publications

Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction

Metal Micro-Monoliths for the Kinetic Study and the Intensification of the Water Gas Shift Reaction

Influence of Raw Material Drying Temperature on the Scots Pine (Pinus sylvestris L.) Biomass Agglomeration Process—A Preliminary Study

Pt/CePO4catalysts for the WGS reaction: influence of the water-supplier role of the support on the catalytic performance

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Pt/CePO₄catalysts for the WGS reaction: influence of the water-supplier role of the support on the catalytic performance