Steam methane reforming in a PdAu membrane reactor: Long-term assessment

Hawa, Hani W. Abu El; Lundin, Sean-Thomas B.; Patki, Neil S.; Way, J. Douglas

doi:10.1016/j.ijhydene.2016.04.244

Cited by 61 publications

(14 citation statements)

References 45 publications

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“…It is known that different types of catalysts are applied to improve the efficiency of this chemical process. The nickel (Ni)‐based catalysts are widely used in large‐scale hydrogen production . Moreover, the noble metals such as ruthenium (Ru), rhodium (Rh), palladium (Pd), iridium (Ir), and platinum (Pt) are also used as active elements in the catalysts for steam methane reforming.…”

Section: Introductionmentioning

confidence: 99%

Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach

Pashchenko

2019

AIChE Journal

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Numerical simulations and experiments have been carried out to explore the effect of particle shapes on the pressure drop and the loss factor in a packed fixed bed filled with a porous catalyst. The packed bed is presented by the Ni‐Al2O3 catalyst of the different shapes. The commercial program ANSYS Fluent is used for the analysis; more than 20 mln cells are used for computational fluid dynamics (CFD) modeling. The catalyst particles were set as a porous medium with the viscous resistance coefficients and the inertial resistance coefficients. The comparison of the pressure drops between the experimental and simulation results show a good correlation with the divergence of results <8%. To determine the effect of the porosity properties of the medium on the numerical results, two cases of CFD modeling were realized (with taking into account the porous medium properties and without it). The discrepancy between results increases with an increasing gas flow rate.

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Section: Introductionmentioning

confidence: 99%

Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach

Pashchenko

2019

AIChE Journal

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“…Because thermal stability testing suggested safe operation of the frit at 520 °C, this was chosen as the operating temperature for the furnace. The reactor conditions were similar to that of our previous work [24], with a steam-to-carbon ratio (SCR) of 3, trans-membrane pressure of 2.9 MPa, and a methane gas hourly space velocity (GHSV) of 184 h -1 . Although the furnace temperature maintained an outer temperature of 520 °C, the internal thermocouple measured a permeate temperature of ca.…”

Section: Smr Membrane Reactormentioning

confidence: 93%

“…The permeation system for the WGS, SMR, and steam tolerance experiments was the same as in our recent SMR publication [24]. It consisted of individual Brooks 5850i mass flow controllers supplying Ar (99.98 %), CH 4 (99.97 %), CO 2 (98 %), CO (99 %), and/or H 2 (99.9 %) to the feed side, as well as a mass flow meter measuring the permeate flow rate.…”

Section: Membrane Reactor Operation and Analysismentioning

confidence: 99%

Glass frit sealing method for macroscopic defects in Pd-based composite membranes with application in catalytic membrane reactors

Lundin

Law

Patki

et al. 2017

Separation and Purification Technology

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A method of sealing defects in thin-film Pd-alloy composite membranes using commercially available glass frit powder is detailed. This technique involves application of a low melting point glass frit and in situ firing in inert gas to seal defects on the order of 1 mm in diameter. In this case, a glass frit with a melting point of 560 °C was found to produce stable seals at 520 °C during a 150 h stability test under pure hydrogen. Changing the feed mixture to 50 % H 2 , 25 % Ar and 25 % steam, however, caused softening and subsequent seal failure at 520 °C. However, stable operation was achieved with water gas-shift mixtures when the temperature was reduced to 400 ºC. The seal is demonstrated to be very robust within ammonia decomposition membrane reactors. Even though the frit seal had direct contact with the catalyst bed, it was observed to be stable in an ammonia decomposition reactor at 520 °C. The catalytic membrane reactor obtained 98 % conversion, producing above 99 % purity hydrogen with a flux of 0.11 mol m-2 s-1 for 150 h with no signs of seal degradation.

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“…A conversão de metano obtida foi de 96,38% e a recuperação de hidrogênio foi de 64,05%. Comparando os resultados com outros trabalhos presentes na literatura, como por exemplo, Hawa et al (2016) [14], e Matsumura e Tong (2008) [15], pode-se considerar que os valores obtidos foram satisfatórios. No entanto, é válido salientar que o número de iterações necessárias no PSO foi menor do que as utilizadas no AG, levando a um tempo de execução bem menor para o primeiro método.…”

Section: Otimização Do Reator Com Membranaunclassified

Aplicação de métodos heurísticos de otimização na produção de hidrogênio por reforma a vapor

Reis¹,

Guimarães²,

Netto

et al. 2018

Sci. Plena

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A disponibilidade de inúmeras fontes de gás natural torna viável a utilização de diferentes processos de produção de hidrogênio, insumo este empregado na obtenção dos mais diversos produtos (e.g., fertilizantes, combustíveis, lubrificantes, polímeros, etc). Dentre estes processos, os reatores de reforma são os mais utilizados industrialmente para produção de hidrogênio. Pretendendo maximizar a produtividade e a eficiência energética, as técnicas de fluidodinâmica computacionais são amplamente utilizadas para avaliar o desempenho dos processos sem o custo de implementação do projeto real. O presente trabalho objetivou simular, aplicando o software ANSYS- CFX, o processo de produção de hidrogênio a partir da reforma a vapor do metano utilizando um reator com membrana, visando realizar a produção e separação no mesmo equipamento, além de determinar as condições ótimas de operação. As técnicas de otimização Algoritmo Genético e Enxame de Partículas foram aplicadas e comparadas na investigação das condições de otimalidade do processo. As condições ótimas de temperatura operacional e razão molar de alimentação H2O/CH4 encontradas foram 873,15 K e 6, respectivamente, fornecendo 96,38 % de conversão de metano e 64,05 % de recuperação de hidrogênio, corroborando a eficiência das técnicas aplicadas.

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Steam methane reforming in a PdAu membrane reactor: Long-term assessment

Cited by 61 publications

References 45 publications

Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach

Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach

Glass frit sealing method for macroscopic defects in Pd-based composite membranes with application in catalytic membrane reactors

Aplicação de métodos heurísticos de otimização na produção de hidrogênio por reforma a vapor

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Steam methane reforming in a PdAu membrane reactor: Long-term assessment

Cited by 61 publications

References 45 publications

Flow dynamic in a packed bed filled with Ni‐Al2O3 porous catalyst: Experimental and numerical approach

Flow dynamic in a packed bed filled with Ni‐Al2O3 porous catalyst: Experimental and numerical approach

Glass frit sealing method for macroscopic defects in Pd-based composite membranes with application in catalytic membrane reactors

Aplicação de métodos heurísticos de otimização na produção de hidrogênio por reforma a vapor

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Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach

Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach