Numerical predictions on thermal characteristic and performance of methanol steam reforming with microwave-assisted heating

Wei Hsin Chen, Tsung Chieh Cheng, Chen I. Hung

研究成果: Article

21 引文 斯高帕斯(Scopus)

摘要

Microwave irradiation is an effective route to trigger methanol steam reforming (MSR) for hydrogen production because of the double absorption of microwaves by both the reagents and the catalyst. To recognize the thermal characteristic and performance of MSR in an environment with microwave irradiation, a numerical method is employed to predict the coupling phenomena of electromagnetic field, flow field and chemical reactions. Methanol decomposition (MD) is also regarded while MSR proceeds. Two sets of complex relative permittivity are established to account for the transmission of electromagnetic waves to heat reactants in the non-porous zone and the porous zone. Moreover, the effects of heat loss, microwave power and reagent flow rate on MSR are taken into account. The predictions suggest that heat loss is an important factor when the appropriate models with microwave-assisted heating are developed. A higher power is conducive to the performance of MSR, resulting from more heat generated in the reaction tube. At a given microwave power, heat generation due to microwave irradiation is independent of Reynolds number. As a result, increasing Reynolds number lessens methanol conversion and H2 yield, as a consequence of more reagents passing through the catalyst bed. However, it is of interest that there exists an optimal Reynolds number for MSR to consume heat stemming from microwave irradiation.

原文English
頁(從 - 到)8279-8291
頁數13
期刊International Journal of Hydrogen Energy
36
發行號14
DOIs
出版狀態Published - 2011 七月 1

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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