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• W3033381528 endingPage "19744" @default.
• W3033381528 startingPage "19733" @default.
• W3033381528 abstract "A microchannel reactor with a porous surface catalyst support has been applied to methanol steam reforming (MSR) for hydrogen production. The fluid flow, heat transfer, and hydrogen production efficiency of the microchannel reactor are significantly affected by the fabricated porous surface support, such as the pore sizes and their distributions. This paper presents a novel microchannel reactor with a gradient porous surface as the reaction substrate to enhance the performance of the microreactor for hydrogen production. Numerical modeling of the gradient porous surface is developed based on fractal geometry, and three different types of porous surfaces as the catalyst supports (two gradient porous surfaces and one uniform pore-size surface) are investigated. The fluid flow and heat transfer characteristics of these three types of microchannel reactors are studied numerically, and the results showed that the microreactor with a positive gradient pore sized surface exhibited relatively better overall performance. Experimental setups and tests were performed and the results validate that the microchannel reactor with a positive gradient porous surface can increase the heat transfer performance by up to 18% and can decrease the pressure drop by up to 8% when compared to a microreactor with a uniform pore sized surface. Hydrogen production experiments demonstrated that the microreactor with positive gradient pore sizes has the highest methanol conversion rate of 56.3%, and this rate is determined to be 6% and 9% higher than that of microreactors with reverse gradient porous surfaces and uniform pore sized surface, respectively." @default.
• W3033381528 created "2020-06-12" @default.
• W3033381528 creator A5027750914 @default.
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• W3033381528 date "2020-07-01" @default.
• W3033381528 modified "2023-10-10" @default.
• W3033381528 title "Numerical modeling of microchannel reactors with gradient porous surfaces for hydrogen production based on fractal geometry" @default.
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• W3033381528 doi "https://doi.org/10.1016/j.ijhydene.2020.05.041" @default.
• W3033381528 hasPublicationYear "2020" @default.
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