Microchannel process technology for compact methane steam reforming

Tonkovich, Anna Lee; Perry, Steve F.; Wang, Yong; Qiu, Dongming; LaPlante, Timothy J.; Rogers, William A.

doi:10.1016/j.ces.2004.07.098

Cited by 168 publications

(102 citation statements)

References 3 publications

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“…Samples were firstly coated with gold in a vacuum chamber for 2 min at 20 mA (EMITECH Model K550) and connected with the metal support by brushing silver paint. A detailed assessment of the pore structure and porosity was carried out by mercury intrusion porosimetry (Autopore IV 9500, Micrometrics), over a pressure range from 1.5x10 3 to 2.3x10 8 Pa and with a set stabilization time of 10 s.…”

Section: Characterizationmentioning

confidence: 99%

“…Miniaturization of reaction units, as micro-reactors, have been receiving increasing attention due to their compact design, improved heat and mass transfer efficiencies, reduced weight and enhanced lifetime of catalyst and improved conversion, yield and selectivity. [7][8][9][10] All these features come at lower capital and operating costs. 11 The micro-reactor configuration provides mostly a laminar (1< Re< 1000), directed and highly symmetric hydrodynamic flow and reduces the interparticle mass transfer resistance, allowing a better and faster contact between reactants and catalyst.…”

Section: Introductionmentioning

confidence: 99%

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Microstructured Catalytic Hollow Fiber Reactor for Methane Steam Reforming

Gil

Chadwick

et al. 2015

Ind. Eng. Chem. Res.

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Micro-structured alumina hollow fibres, which contain a plurality of radial micro-channels with significant openings on the inner surface, have been fabricated in this study and used to develop an efficient catalytic hollow fibre reactor. Apart from low mass transfer resistance, a unique structure of this type facilitates the incorporation of Ni-based catalysts, which can be with or without the aged secondary support, SBA-15. In contrast to a fixed bed reactor, the catalytic hollow fibre reactor shows similar methane conversion, with a GHVS of approximately 6.5 times higher, together with a significantly greater CO 2 selectivity and better productivity rates. All these prove the advantages of dispersing catalyst inside the micro-structured hollow fibre together with potentially reducing the quantity of catalysts required.

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Section: Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructured Catalytic Hollow Fiber Reactor for Methane Steam Reforming

Gil

Chadwick

et al. 2015

Ind. Eng. Chem. Res.

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“…Moreover, improving mass and heat transfers of a micro-reactor by enlarging effective surface area and reducing transport distance of a catalytic reaction would further intensify the process (Tonkovich et al, 2007;Tonkovich et al, 2004;Zanfir and Gavriilidis, 2003;Zhai et al, 2010). Therefore, higher methane conversion and H 2 yield can be expected at much lower temperatures, and CO 2 can be captured at the same time.…”

Section: Introductionmentioning

confidence: 99%

A catalytic hollow fibre membrane reactor for combined steam methane reforming and water gas shift reaction

Gil

Chadwick

et al. 2015

Chemical Engineering Science

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A catalytic hollow fibre membrane reactor (CHFMR) was developed in this study for combined steam methane reforming (SMR) and water gas shift (WGS) reaction. This is achieved by incorporating a Ni/SBA-15 catalyst into a plurality of micro-channels with open entrance from inner surface of Al 2 O 3 hollow fibres, followed by coating of a 3.3 µm Pd membrane on the outer surface of the hollow fibre using an electroless plating method. In addition to systematic characterizations of each reactor component, i.e. Ni/SBA-15 catalyst, micro-structured ceramic hollow fibre and Pd separating layer, the effect of how the reactor was assembled or fabricated on the catalytic performance was evaluated. Electroless plating of the Pd membrane impaired the catalytic performance of the deposited Ni/SBA-15 catalyst. Also, the over-removal of hydrogen from the reaction zone was considered as the main reason for the deactivation of the Ni-based catalyst. Instead of mitigating such deactivation using "compensating" hydrogen, starting the reaction at higher temperatures was found more efficient in improving the reactor performance, due to a better match between hydrogen production (from the reaction) and hydrogen removal (from the Pd membrane). An effective methane conversion of approximately 53 %, a CO 2 selectivity of 94 % and a H 2 recovery of 43% can be achieved at 560 °C. In order for a more significant "shift" phenomenon, alternative methodology of fabricating the reactor and more coke resistant catalysts are recommended.

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“…Researchers are being done in order to develop small-scale SMR technologies to enable the development of distributed hydrogen production and delivery infrastructure [1,2]. Therefore due to attaining this goal small-scale SMR technologies should be modeled and optimized [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Monolith catalysts can be widely used in many applications particularly for their high geometric surface area, low pressure drop and good mechanical strength and durability [8]. In addition using monolithic reactors have significant advantages such as reduced capital cost, smaller footprints and potentially easier transportation [1,[9][10][11]. These advantages can be particularly valuable when considering the exploration of remote resources such as offshore reserves of natural gas [12].…”

Section: Introductionmentioning

confidence: 99%

Resolving a Challenge in the Modeling of Hydrogen Production Using Steam Reforming of Methane in Monolith Reactors Using CFD Methods

Irani¹

2012

AMPC

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Reaction modeling of SMR (Steam Methane Reforming) process inside monolith reactors using two approaches were investigated and compared with each other. In the first approach, the reactions were assumed to take place exactly on the wall surfaces, while in the second approach they considered inside a thin thickness near the walls. Experiments of SMR were carried out in a lab-scale monolith reactor. A single-channel was considered and CFD model were developed for each of aforementioned approaches. Comparisons between modeling results and experimental data showed that the first approach (surface model) gives better results. Performing reactions are difficult and expensive, CFD simulations are considered as numerical experiments in many cases. It was concluded that obtained results from CFD analysis gives precise guidelines for further studies on optimization of SMR monolithic reactor performance.

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Microchannel process technology for compact methane steam reforming

Cited by 168 publications

References 3 publications

Microstructured Catalytic Hollow Fiber Reactor for Methane Steam Reforming

Microstructured Catalytic Hollow Fiber Reactor for Methane Steam Reforming

A catalytic hollow fibre membrane reactor for combined steam methane reforming and water gas shift reaction

Resolving a Challenge in the Modeling of Hydrogen Production Using Steam Reforming of Methane in Monolith Reactors Using CFD Methods

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