High conductivity catalyst structures for applications in exothermic reactions

Sheng, Min; Yang, Huihua; Cahela, Donald R.; Yantz, William R.; Gonzalez, Carlos F.; Tatarchuk, Bruce J.

doi:10.1016/j.apcata.2012.08.012

Cited by 44 publications

(45 citation statements)

References 29 publications

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“…Brought to you by | University of Canterbury Authenticated Download Date | 8/28/17 6:01 AM In recent developments, various studies have proven the use of microfibrous material (MFM) in making a metal structure with enhanced heat transfer characteristics (Tronconi et al 2014). MFM is a high-porosity material made of sintered metal fibers of micron diameter (Sheng et al 2011(Sheng et al , 2012(Sheng et al , 2013, which may potentially serve as a platform to develop MFM as a monolithic support, by entrapment of catalyst particles into the structure via an electroplating technique to form microfibrous entrapped catalyst (MFEC). MFECs in general provide high porosity volume, uniform distribution of catalyst particles, and high contacting efficiency, leading to enhanced mass and heat transfer.…”

Section: Case 1 Casementioning

confidence: 99%

Monolithic substrate support catalyst design considerations for steam methane reforming operation

Baharudin

Watson

2017

Reviews in Chemical Engineering

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Abstract This paper reviews the research undertaken to study the design criteria that address the monolithic support structure requirements in steam reforming operation for the effective mass transfer of process gases to the active sites and effective conductive heat transfer through tube wall to the active catalytic areas, as well as low pressure drop operation. Design considerations include selection of substrate materials that possess good mechanical strength to withstand the severe reaction conditions and prevent catalyst crushing that would lead to carbon formation and catalyst deactivation, and excessive heating of the tube that results in hot spots which is fatal to tube lifetime. The support’s mechanical properties are listed for the purpose of providing guidelines on verifying the structure durability. The practical aspect of packaging and stacking the monolith structures in the reformer tube for ease of loading and discharge is discussed to understand its readiness in industrial application.

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Section: Case 1 Casementioning

confidence: 99%

Monolithic substrate support catalyst design considerations for steam methane reforming operation

Baharudin

Watson

2017

Reviews in Chemical Engineering

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“…Recently, a structured conductive catalyst support was developed by Tatarchuk and co-workers [81,82] that is based on the macroscopic assembly of a microfibrous entrapped catalyst (MFEC) with enhanced heat transfer. The cobalt catalyst was deposited on the alumina support, which was subsequently entrapped in the copper MFEC.…”

Section: Conductive Structured Metal Supportsmentioning

confidence: 99%

Fischer–Tropsch Reaction on a Thermally Conductive and Reusable Silicon Carbide Support

et al. 2014

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The Fischer-Tropsch (FT) process, in which synthesis gas (syngas) derived from coal, natural gas, and biomass is converted into synthetic liquid fuels and chemicals, is a strongly exothermic reaction, and thus, a large amount of heat is generated during the reaction that could severely modify the overall selectivity of the process. In this Review, we report the advantages that can be offered by different thermally conductive supports, that is, carbon nanomaterials and silicon carbide, pure or doped with different promoters, for the development of more active and selective FT catalysts. This Review follows a discussion regarding the clear trend in the advantages and drawbacks of these systems in terms of energy efficiency and catalytic performance for this most-demanded catalytic process. It is demonstrated that the use of a support with an appropriate pore size and thermal conductivity is an effective strategy to tune and improve the activity of the catalyst and to improve product selectivity in the FT process. The active phase and the recovery of the support, which also represents a main concern in terms of the large amount of FT catalyst used and the cost of the active cobalt phase, is also discussed within the framework of this Review. It is expected that a thermally conductive support such as β-SiC will not only improve the development of the FT process, but that it will also be part of a new support for different catalytic processes for which high catalytic performance and selectivity are strongly needed.

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“…4 In this way, the heat transfer is strongly enhanced in compact reactors because the primary radial heat exchange mechanism is changed from convection to conduction within the thermally connected solid matrix of the honeycomb monolith. 4 Besides packed honeycomb monoliths, other washcoated metallic structures with different geometries, such as micromonoliths 5 and foams, 6,7 as well as micro-fibrous entrapped catalysts 8,9 were proposed for FTS. All these metallic structures exhibit an effective temperature control, but with the foremost limit of low catalyst inventory.…”

Section: Introductionmentioning

confidence: 99%

“…All these metallic structures exhibit an effective temperature control, but with the foremost limit of low catalyst inventory. [5][6][7][8][9] Closed-cross flow structures packed with catalyst pellets 10,11 were also proposed, claiming an increase of the C 5+ productivity with respect to the aforementioned washcoated structures. However, these structures still exploit a flowdependent heat transfer mechanism, 10,11 which implies a less flexible operation of the reactor.…”

Section: Introductionmentioning

confidence: 99%

The pivotal role of an interconnected cellular conductive structure to manage heat removal in compact Fischer–Tropsch fixed-bed reactors

et al. 2019

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High conductivity catalyst structures for applications in exothermic reactions

Cited by 44 publications

References 29 publications

Monolithic substrate support catalyst design considerations for steam methane reforming operation

Monolithic substrate support catalyst design considerations for steam methane reforming operation

Fischer–Tropsch Reaction on a Thermally Conductive and Reusable Silicon Carbide Support

The pivotal role of an interconnected cellular conductive structure to manage heat removal in compact Fischer–Tropsch fixed-bed reactors

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