Electrified methane reforming: Elucidating transient phenomena

Wismann, Sebastian Thor; Engbæk, Jakob; Vendelbo, Søren Bastholm; Eriksen, Winnie L.; Frandsen, Cathrine; Mortensen, Peter Mølgaard; Chorkendorff, Ib

doi:10.1016/j.cej.2021.131509

Cited by 55 publications

(25 citation statements)

References 26 publications

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“…Reduction of temperature gradients inside the chemical reactors, faster temperature response as well as higher temperatures can be achieved by electric heating in comparison to conventional heating methods, which makes it advantageous against thermodynamic, kinetic, and operational constraints 9 . In this regards, few studies have been reported concerning the electrification of methane reforming 10–16 . Recently, an innovative reactor concept with an electrically heated washcoated FeCrAl‐alloy tube ( d t = 6 mm) was proposed by Wismann et al 13–15 They report the experimental and numerical investigation of a system based on a steel tube connected to a power generator with an internal coating of Ni‐based catalysts.…”

Section: Introductionmentioning

confidence: 99%

Electrified methane steam reforming on a washcoated SiSiC foam for low‐carbon hydrogen production

et al. 2022

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In view of largely available renewable electricity as a green future resource, here we report the electrification of a Rh/Al 2 O 3 washcoated SiSiC foam for methane steam reforming (MSR). We show that, thanks to the suitable bulk resistivity of the SiSiC foam, its direct Joule heating up to relevant temperatures is feasible; the interconnected geometry greatly reduces heat and mass transfer limitations, which results in a highly active and energy efficient system for low-carbon H 2 production. The foam-based electrified MSR (eMSR) system showed almost full methane conversion above 700 C and methane conversions approaching equilibrium were obtained in a range of conditions. Energy efficiency as high as 61% and specific power consumption as low as 2.0 kWh/Nm 3 H 2 were measured at 650 C, at gas hourly space velocity (GHSV) of 150,000 cm 3 /h/g cat . When driven by renewable electricity, the proposed reactor configuration promises a high potential to address the decarbonization challenge in the near-term future.

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Section: Introductionmentioning

confidence: 99%

Electrified methane steam reforming on a washcoated SiSiC foam for low‐carbon hydrogen production

et al. 2022

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“…Results demonstrated how the direct contact between heat source and catalyst changes the heat transfer dynamics, thus reducing the temperature gradients with respect to fired reformers. The flexibility of electrically heated systems was further validated by a combination of CFD modelling and lab scale reactor tests (Wismann et al, 2021). In a similar way, Renda et al tested direct Joule heating by using commercial silicon carbide heating elements (Renda et al, 2020), demonstrating the feasibility of heating up the system to high temperature (i.e.…”

Section: Decarbonization Of Msr By Electrificationmentioning

confidence: 99%

Recent Advances in the Development of Highly Conductive Structured Supports for the Intensification of Non-adiabatic Gas-Solid Catalytic Processes: The Methane Steam Reforming Case Study

et al. 2022

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Structured catalysts are strong candidates for the intensification of non-adiabatic gas-solid catalytic processes thanks to their superior heat and mass transfer properties combined with low pressure drops. In the past two decades, different types of substrates have been proposed, including honeycomb monoliths, open-cell foams and, more recently, periodic open cellular structures produced by additive manufacturing methods. Among others, thermally conductive metallic cellular substrates have been extensively tested in heat-transfer limited exo- or endo-thermic processes in tubular reactors, demonstrating significant potential for process intensification. The catalytic activation of these geometries is critical: on one hand, these structures can be washcoated with a thin layer of catalytic active phase, but the resulting catalyst inventory is limited. More recently, an alternative approach has been proposed, which relies on packing the cavities of the metallic matrix with catalyst pellets. In this paper, an up-to-date overview of the aforementioned topics will be provided. After a brief introduction concerning the concept of structured catalysts based on highly conductive supports, specific attention will be devoted to the most recent advances in their manufacturing and in their catalytic activation. Finally, the application to the methane steam reforming process will be presented as a relevant case study of process intensification. The results from a comparison of three different reactor layouts (i.e. conventional packed bed, washcoated copper foams and packed copper foams) will highlight the benefits for the overall reformer performance resulting from the adoption of highly conductive structured internals.

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“…For example, endothermic catalytic reactors utilizing large furnaces could be replaced by units containing resistively-heated catalyst supports. Such new designs and operational schemes have started to be explored, including, Ni-based catalyst supported on structured SiC 20 or coated metal tube reactor operated under unsteady power input 19,24 . A notable advantage of the layered catalyst approach is the intimate contact of the catalyst with the heated substrate, which allows precise temperature control and reduces diffusional limitations.…”

Section: Resistive Heatingmentioning

confidence: 99%

Decarbonization of the Chemical Industry through Electrification: Barriers and Opportunities

Mallapragada

Dvorkin

Modestino

et al. 2022

Preprint

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The chemical industry is a major source of economic productivity and employment globally and among the top 3 industrial sources of greenhouse gas (GHG) emissions, along with steel and cement. As global demand for chemical products continues to grow, there is an urgency to develop and deploy sustainable chemical production pathways and re-consider continued investment in current emissionintensive production technologies. This Perspective describes the challenges and opportunities to decarbonize the chemical industry via electrification powered by the low-emission electric power sector, both in the near-term and long-term, and discusses four technological pathways ranging from the more mature direct substitution of heat with electricity and use of hydrogen to technologically less mature, yet potentially more selective approaches based on electrochemistry and plasma. Finally, we highlight the key elements of integrating an electrified industrial process with the power sector to leverage process flexibility to reduce energy costs of chemical production and provide valuable power grid support services. Unlocking such plant-to-grid coordination and the four electrification pathways has significant potential to facilitate rapid and deep decarbonization of the chemical industry sector.

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Electrified methane reforming: Elucidating transient phenomena

Cited by 55 publications

References 26 publications

Electrified methane steam reforming on a washcoated SiSiC foam for low‐carbon hydrogen production

Electrified methane steam reforming on a washcoated SiSiC foam for low‐carbon hydrogen production

Recent Advances in the Development of Highly Conductive Structured Supports for the Intensification of Non-adiabatic Gas-Solid Catalytic Processes: The Methane Steam Reforming Case Study

Decarbonization of the Chemical Industry through Electrification: Barriers and Opportunities

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