Numerical study of heat and mass transfer in the plate methanol steam micro-reformer channels

Hsueh, Ching; Chu, Hsin; Chen, Chiun-Hsun; Chang, Ming Wen

doi:10.1016/j.applthermaleng.2010.03.002

Cited by 15 publications

(3 citation statements)

References 23 publications

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“…The impact of altering the Reynolds numbers of the feedstock on CH 3 OH conversion and H 2 yield is examined in Figure 12 where the inlet temperature is fixed at 300°C, the S/C ratio is fixed at 1.5, and the Reynolds number of steam in the two steam tubes is 100. A low Reynolds number means a low flow rate, resulting in a longer residence time of the reactants in the catalyst bed and a higher methanol conversion, as shown in Figure 12A 60,61 . As the Reynolds number increases from 10 to 500, the CH 3 OH conversion decreases from 100% to 78.38%.…”

Section: Resultsmentioning

confidence: 99%

“…A low Reynolds number means a low flow rate, resulting in a longer residence time of the reactants in the catalyst bed and a higher methanol conversion, as shown in Figure 12A. 60,61 As the Reynolds number increases from 10 to 500, the CH 3 OH conversion decreases from 100% to 78.38%. Figure 12B depicts that the H 2 yield is lifted from 2.69 to 2.74 mol (mol CH 3 OH) À1 when the Reynolds number increases from 10 to 50, presumably as a consequence of weakened rWGSR and thus giving rise to the most H 2 produced.…”

Section: Effect Of Reynolds Numbermentioning

confidence: 99%

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Reactor design of methanol steam reforming by evolutionary computation and hydrogen production maximization by machine learning

Chen

Hsu

et al. 2021

Intl J of Energy Research

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Summary A numerical model is developed to predict the methanol steam reforming for H2 production. This research designs an methanol steam reforming reactor and uses the Nelder‐Mead algorithm to find an equivalent steam tube radius by minimizing the error between the simulation and experimental data. The effects of three operating parameters (ie, inlet temperature, S/C ratio, and Reynolds number) on CH3OH conversion and H2 yield are discussed. Finally, the predictions of CH3OH conversion and H2 yield in terms of the operating parameters through neural networks are performed for finding the best combination of the operating parameter to maximize the H2 yield. After finding the equivalent radius from the simplified reactor, the evolutionary computation improves the prediction accuracy by 42.69%. For the operating parameters, an increase in temperature or S/C ratio intensifies the reforming performance, whereas the Reynolds number of 50 is more suitable for H2 production. A three‐step training and test of the database by the neural networks is adopted to evaluate the influence of the number of data sets and find the best combination of the parameters. The best combination poses the highest H2 yield of 2.905 mol (mol CH3OH)−1, and the error between the prediction and simulation is merely 0.206%.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Reynolds Numbermentioning

confidence: 99%

Reactor design of methanol steam reforming by evolutionary computation and hydrogen production maximization by machine learning

Chen

Hsu

et al. 2021

Intl J of Energy Research

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“…Shahrokhi et.al [6] concluded that the reasonable reaction temperature for methanol synthesis is 493K-573K. Hsueh et.al [7] conducted the numerical study of heat and mass transfer in a plate methanol steam micro-reformer channels. However, the current researches on the thermal performance of the methanol synthetic are not in-depth enough.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Thermal Performance for the Reaction Tubes in a Miniaturized Methanol Synthesis Reactor

Xiong¹,

Yin²,

Cao³

et al. 2021

dteees

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The reaction of methanol synthesis via hydrogen and carbon dioxide which has a broad application prospect in the energy field should be carried out in a reasonable temperature range. Thus, a comprehensive thermal analysis under different work conditions for the reaction tube which is the really reaction place in the miniaturized methanol synthesis reactor is of great significance to its temperature control and thermal design. In this paper, the thermal analysis models of reaction tube in methanol synthesis reactor via hydrogen and carbon dioxide are established, through numerical simulation, the thermal performance results which include the molar ratio of methanol synthesis and temperature distribution inside reaction tubes changing with the reaction tube diameter, inlet gas temperature, and space velocity are obtained. Based on the results, the change laws of the methanol synthesis molar ratio and temperature distribution change with the three parameters are summed, which provide a reference to the thermal design and working conditions setting for the miniaturized methanol synthesis reactor of hydrogen and carbon dioxide.

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Effect of a diffuser on performance enhancement of a cylindrical methanol steam reformer by computational fluid dynamic analysis

Perng

Horng

2017

Applied Energy

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Numerical study of heat and mass transfer in the plate methanol steam micro-reformer channels

Cited by 15 publications

References 23 publications

Reactor design of methanol steam reforming by evolutionary computation and hydrogen production maximization by machine learning

Reactor design of methanol steam reforming by evolutionary computation and hydrogen production maximization by machine learning

Numerical Simulation of Thermal Performance for the Reaction Tubes in a Miniaturized Methanol Synthesis Reactor

Effect of a diffuser on performance enhancement of a cylindrical methanol steam reformer by computational fluid dynamic analysis

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