Microkinetics of steam methane reforming on platinum and rhodium metal surfaces

Zhu, Tao; Grootel, PW Pieter van; Filot, Ivo A. W.; Sun, S-G; Santen, Rutger A. van; Hensen, Ejm Emiel

doi:10.1016/j.jcat.2012.10.010

Cited by 48 publications

(37 citation statements)

References 35 publications

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“…These mechanistic results were later confirmed by Zhu et al [38] for Pt-based catalysts, in which case it was proposed that high temperature deactivation occurs due to poisoning by carbonaceous species such that the rate of surface OH/O species becomes too low compared to the rate of surface The largest variability was observed among the catalyst samples unloaded after 336 h, where a residual activity in between 43 and 75% was measured. However, the run had been characterized by several shut-downs and start-ups, which might make the long-term operation more "stressful" for the catalyst and the reactor.…”

Section: Catalyst Ageingsupporting

confidence: 59%

“…These mechanistic results were later confirmed by Zhu et al [38] for Pt-based catalysts, in which case it was proposed that high temperature deactivation occurs due to poisoning by carbonaceous species such that the rate of surface OH/O species becomes too low compared to the rate of surface CH intermediate, thus hindering their gasification to CO and H 2 . This mechanism of deactivation would occur at lower temperature for Pt than for Rh because of the lower Pt-O bond energy.…”

Section: Catalyst Ageingmentioning

confidence: 55%

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Development of a Catalytic Fuel Processor for a 10 kW Combined Heat and Power System: Experimental and Modeling Analysis of the Steam Reforming Unit

et al. 2018

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Abstract:In this work, we address the development of a combined heat and power unit for residential applications, fed by natural gas, air and H 2 O; focus is on the design of the first catalytic stage of the fuel processor, that is the steam reforming unit. A commercial catalyst was tested at the laboratory scale, under kinetically controlled conditions in order to derive information on the reaction kinetics and support the basic engineering of the full scale reactor. Analogous tests after long term steam reforming ageing were then performed to quantify the evolution of the catalyst activity under real operating conditions and estimate a lumped deactivation factor. A modelling analysis was performed to predict the expected performance of the fuel processor at varying input parameters and catalyst activity profiles. It was verified that at a space velocity below 5000 Nl/kg cat /h, the reactor output is fully controlled by the thermodynamics at 650 • C, which guarantees the best operability and efficiency of the whole fuel processor.

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Section: Catalyst Ageingsupporting

confidence: 59%

“…These mechanistic results were later confirmed by Zhu et al [38] for Pt-based catalysts, in which case it was proposed that high temperature deactivation occurs due to poisoning by carbonaceous species such that the rate of surface OH/O species becomes too low compared to the rate of surface CH intermediate, thus hindering their gasification to CO and H 2 . This mechanism of deactivation would occur at lower temperature for Pt than for Rh because of the lower Pt-O bond energy.…”

Section: Catalyst Ageingmentioning

confidence: 55%

Development of a Catalytic Fuel Processor for a 10 kW Combined Heat and Power System: Experimental and Modeling Analysis of the Steam Reforming Unit

et al. 2018

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“…Although step-edge sites can also contribute to reactivity in real catalysts, such as in the CH 4 activation [30], the C-O formation [27,[31][32][33][34], or the growing of filamentous carbon [26,35], they will not be considered in this contribution. The goal of this work is to provide further insights into intrinsic [36][37][38] and the projector augmented wave (PAW) method [39], for which interactions between valence electrons and ion cores are described by pseudopotentials and the electronic wavefunctions are expanded in terms of a discrete plane-wave basis set.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic reactivity of Ni, Pd and Pt surfaces in dry reforming and competitive reactions: Insights from first principles calculations and microkinetic modeling simulations

Foppa

Silaghi

Larmier

et al. 2016

Journal of Catalysis

173

110

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“…Conventional steam reforming is a highly endothermic reaction and needs a big top-fired or side-fired furnace for external heating of Ni-packed tubes 8 . Steam reforming by methane as the feed stock has been extensively studied in the literature [9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Simulating and Optimizing Hydrogen Production by Low-pressure Autothermal Reforming of Natural Gas using Non-dominated Sorting Genetic Algorithm-II

Azarhoosh

Ebrahim

Pourtarah

2016

Chem. Biochem. Eng. Q.

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Conventional hydrogen production plants consist of natural gas steam reforming to CO+3H 2 on Ni catalysts in a furnace, water-gas shift reaction for converting CO into CO 2 and CO 2 absorption. A new alternative method for highly endothermic steam reforming is autothermal reforming (steam reforming with air input to the reactor) without the need for external heating. In this study, hydrogen production by autothermal reforming for fuel cells (base case) was simulated based on a heterogeneous and one-dimensional model. In addition, the effect of operating variables on the system behavior was studied. Finally, Pareto-optimal solutions for the maximum molar flow rate of the produced hydrogen and methane conversion were determined by NSGA-II. There was a huge increase in the produced hydrogen molar flow to the base case, which showed the importance of optimizing autothermal reformers for hydrogen production.

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Microkinetics of steam methane reforming on platinum and rhodium metal surfaces

Cited by 48 publications

References 35 publications

Development of a Catalytic Fuel Processor for a 10 kW Combined Heat and Power System: Experimental and Modeling Analysis of the Steam Reforming Unit

Development of a Catalytic Fuel Processor for a 10 kW Combined Heat and Power System: Experimental and Modeling Analysis of the Steam Reforming Unit

Intrinsic reactivity of Ni, Pd and Pt surfaces in dry reforming and competitive reactions: Insights from first principles calculations and microkinetic modeling simulations

Simulating and Optimizing Hydrogen Production by Low-pressure Autothermal Reforming of Natural Gas using Non-dominated Sorting Genetic Algorithm-II

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