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Energy integration of methane's partial-oxidation in supercritical water and exergy analysis

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  • Smith, Richard L.
  • Adschiri, Tadafumi
  • Arai, Kunio

Abstract

In this work, we examined the exergy losses of reaction pathways that have been reported in the literature in the context of an integrated methanol production and electrical power flow sheet. Three reaction pathways were examined: (i) complete oxidation, (ii) partial oxidation to produce only methanol, and (iii) partial oxidation to produce methanol and carbon monoxide. The latter was based on experimental data reported for reactions in supercritical water. It was found that there were optimum feed ratios that minimized reactor heat requirements and maximized electrical work output. An exergy analysis showed that the largest irreversibilities occurred in the reactor itself and that the partial oxidation of methane to produce methanol and carbon monoxide gave reactor irreversibilities that were lower than for the total oxidation reaction pathway. Conversion of methane to methanol and carbon monoxide in supercritical water can be accomplished by supplying only chemical exergy.

Suggested Citation

  • Smith, Richard L. & Adschiri, Tadafumi & Arai, Kunio, 2002. "Energy integration of methane's partial-oxidation in supercritical water and exergy analysis," Applied Energy, Elsevier, vol. 71(3), pages 205-214, March.
  • Handle: RePEc:eee:appene:v:71:y:2002:i:3:p:205-214
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    Cited by:

    1. Florentina Maxim & Iuliana Poenaru & Elena Ecaterina Toma & Giuseppe Stefan Stoian & Florina Teodorescu & Cristian Hornoiu & Speranta Tanasescu, 2021. "Functional Materials for Waste-to-Energy Processes in Supercritical Water," Energies, MDPI, vol. 14(21), pages 1-23, November.
    2. Zhang, Fengming & Li, Yufeng & Jia, Cuijie & Shen, Boya, 2021. "Effect of evaporation on the energy conversion of a supercritical water oxidation system containing a hydrothermal flame," Energy, Elsevier, vol. 226(C).
    3. Cabeza, Pablo & Silva Queiroz, Joao Paulo & Criado, Manuel & Jiménez, Cristina & Bermejo, Maria Dolores & Mato, Fidel & Cocero, Maria Jose, 2015. "Supercritical water oxidation for energy production by hydrothermal flame as internal heat source. Experimental results and energetic study," Energy, Elsevier, vol. 90(P2), pages 1584-1594.

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