Characterization of catalytic partial oxidation of methane with carbon dioxide utilization and excess enthalpy recovery

Wei Hsin Chen, Shih Cheng Lin

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The characteristics of catalytic partial oxidation of methane (CPOM) under CO2 addition and excess enthalpy recovery are investigated where a rhodium-based catalyst is employed. The influences of O2/CH4 and CO2/O2 molar ratios, in the ranges of 0.4-0.7 and 0-2, respectively, on CPOM performance are emphasized. The energy efficiency of the Swiss-roll reactor is also studied. The results reveal that the O2/CH4 ratio plays a crucial role in methane conversion, whereas it is insensitive to the CO2/O2 ratio. The H2 contributed by steam reforming is pronounced at higher O2/CH4 ratios; on the other hand, H2 produced from dry reforming is significant at lower O2/CH4 ratios and high CO2/O2 ratios. The H2/CO ratio in the product gas is between 1 and 2, and the values depends on the O2/CH4 and CO2/O2 ratios. Increasing CO2/O2 ratio substantially increases CO2 consumption, but leads to a decrease in CO2 conversion. Within the investigated ranges of O2/CH4 and CO2/O2 ratios, at least 18.2% and up to 77.0% of CO2 in the feed gas is converted to CO. The energy efficiency of the reaction system with considering CH4 conversion is between 83.5% and 89.9%. Overall, CPOM performed at O2/CH4 = 0.6 is recommended in that it provides higher CH4 conversion, syngas production, CO2 consumption, and system energy efficiency.

Original languageEnglish
Pages (from-to)1141-1152
Number of pages12
JournalApplied Energy
Volume162
DOIs
Publication statusPublished - 2014 Oct 5

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enthalpy
Enthalpy
Carbon dioxide
Methane
carbon dioxide
methane
energy efficiency
Energy efficiency
oxidation
Recovery
Oxidation
rhodium
Steam reforming
Rhodium
Reforming reactions
Gases
gas
catalyst
Catalysts
consumption

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Energy(all)
  • Mechanical Engineering
  • Management, Monitoring, Policy and Law

Cite this

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abstract = "The characteristics of catalytic partial oxidation of methane (CPOM) under CO2 addition and excess enthalpy recovery are investigated where a rhodium-based catalyst is employed. The influences of O2/CH4 and CO2/O2 molar ratios, in the ranges of 0.4-0.7 and 0-2, respectively, on CPOM performance are emphasized. The energy efficiency of the Swiss-roll reactor is also studied. The results reveal that the O2/CH4 ratio plays a crucial role in methane conversion, whereas it is insensitive to the CO2/O2 ratio. The H2 contributed by steam reforming is pronounced at higher O2/CH4 ratios; on the other hand, H2 produced from dry reforming is significant at lower O2/CH4 ratios and high CO2/O2 ratios. The H2/CO ratio in the product gas is between 1 and 2, and the values depends on the O2/CH4 and CO2/O2 ratios. Increasing CO2/O2 ratio substantially increases CO2 consumption, but leads to a decrease in CO2 conversion. Within the investigated ranges of O2/CH4 and CO2/O2 ratios, at least 18.2{\%} and up to 77.0{\%} of CO2 in the feed gas is converted to CO. The energy efficiency of the reaction system with considering CH4 conversion is between 83.5{\%} and 89.9{\%}. Overall, CPOM performed at O2/CH4 = 0.6 is recommended in that it provides higher CH4 conversion, syngas production, CO2 consumption, and system energy efficiency.",
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Characterization of catalytic partial oxidation of methane with carbon dioxide utilization and excess enthalpy recovery. / Chen, Wei Hsin; Lin, Shih Cheng.

In: Applied Energy, Vol. 162, 05.10.2014, p. 1141-1152.

Research output: Contribution to journalArticle

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AB - The characteristics of catalytic partial oxidation of methane (CPOM) under CO2 addition and excess enthalpy recovery are investigated where a rhodium-based catalyst is employed. The influences of O2/CH4 and CO2/O2 molar ratios, in the ranges of 0.4-0.7 and 0-2, respectively, on CPOM performance are emphasized. The energy efficiency of the Swiss-roll reactor is also studied. The results reveal that the O2/CH4 ratio plays a crucial role in methane conversion, whereas it is insensitive to the CO2/O2 ratio. The H2 contributed by steam reforming is pronounced at higher O2/CH4 ratios; on the other hand, H2 produced from dry reforming is significant at lower O2/CH4 ratios and high CO2/O2 ratios. The H2/CO ratio in the product gas is between 1 and 2, and the values depends on the O2/CH4 and CO2/O2 ratios. Increasing CO2/O2 ratio substantially increases CO2 consumption, but leads to a decrease in CO2 conversion. Within the investigated ranges of O2/CH4 and CO2/O2 ratios, at least 18.2% and up to 77.0% of CO2 in the feed gas is converted to CO. The energy efficiency of the reaction system with considering CH4 conversion is between 83.5% and 89.9%. Overall, CPOM performed at O2/CH4 = 0.6 is recommended in that it provides higher CH4 conversion, syngas production, CO2 consumption, and system energy efficiency.

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