Enhancement of heat recirculation on the hysteresis effect of catalytic partial oxidation of methane

Wei Hsin Chen, Yun Chuan Cheng, Chen I. Hung

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

The hysteresis characteristics of catalytic partial oxidation of methane (CPOM) in a Swissroll reactor are predicted numerically by varying Damköhler number. Particular attention is paid to the influences of heat recirculation, gas hourly space velocity (GHSV), and atomic O/C ratio on the hysteresis loop and performance of CPOM. The reactions of methane combustion, steam reforming, and CO2 or dry reforming are simultaneously considered. The results reveal that preheating reactants through excess enthalpy recovery is conducive to the ignition of CPOM and extending its extinction limit, so the ignition and extinction Damköhler numbers are lowered. The analysis also suggests that steam reforming is more sensitive to the heat recovery than methane combustion and dry reforming. An increase in GHSV reduces the residence time of reactants in the catalyst bed, thereby enlarging the ignition and extinction Damköhler numbers of CPOM. A higher O/C ratio facilitates the ignition of CPOM, stemming from more oxygen supplied, but the ratio should be controlled below 1.2. From the hysteresis phenomena, hydrogen can be produced from methane at a lower Damköhler number to save more energy for performing CPOM.

原文English
頁(從 - 到)10394-10406
頁數13
期刊International Journal of Hydrogen Energy
38
發行號25
DOIs
出版狀態Published - 2013 8月 21

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 燃料技術
  • 凝聚態物理學
  • 能源工程與電力技術

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