Thermodynamic foundation of the zero emission concept

K. S. Lackner, T. Yegulalp

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

By definition, zero emission coal plants generate power without any purposeful emissions to the atmosphere. This is only possible if all the CO2 produced is captured and if one avoids the admixture of nitrogen from the air with fuel gases. Because zero emission coal plants have no smoke stack, they emit no pollutants to the air. Zero emission plants circulate a gas stream to which fresh fuel is added and from which spent fuel and impurities are removed as solids or liquids. Coal is gasified via hydrogenation (hydrogasification), steam reforming or CO2 gasification (Boudouard reaction). In one class of zero emission coal plants, the gas (not necessarily hydrogen) is oxidized in a fuel cell and the resultant water and CO2 are partially removed before returning the remaining gas to the gasifier. The high conversion efficiency of zero emission power plants, which exceeds 70% even in realistic designs, stems from combining fuel cells with careful heat management. The paper generalizes the concepts and outlines the thermodynamic basis of zero emission power plants.

Original languageEnglish (US)
Pages (from-to)161-167
Number of pages7
JournalMinerals and Metallurgical Processing
Volume22
Issue number3
StatePublished - Aug 1 2005
Externally publishedYes

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Keywords

  • Coal utilization
  • Power generation
  • Thermodynamics
  • Zero emission concept

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Chemistry(all)
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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