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Generalized thermodynamic analysis of high pressure air blown gasifier
Published in American Chemical Society
2014
Volume: 53
   
Issue: 49
Pages: 18750 - 18760
Abstract
In this work, a thermodynamic analysis of a stand alone gasifier is carried out. The analysis uses the nonstoichiometric approach based on the minimization of the Gibbs free energy. The gasification temperature, amount of oxygen required, composition of syngas, and cold gas efficiency are predicted at the carbon boundary point (CBP) using Aspen Plus. The influence of nitrogen when air is used as the gasifying agent is studied. It is found that the presence of nitrogen results in a lower gasification temperature, higher oxygen requirement, lower concentration of CO and H2, higher concentration of CO2 and CH4, and lower cold gas efficiency. The influence of pressure when air is used as the gasifying agent is also studied. It is found that increasing the pressure results in higher gasification temperatures, higher oxygen requirement, lower concentration of CO and H2, higher concentration of CO2 and CH4, and lower cold gas efficiency. Performance charts in the form of contour plots are presented to predict the performance of a high pressure gasifier using air as gasifying agent. © 2014 American Chemical Society.
About the journal
JournalData powered by TypesetIndustrial and Engineering Chemistry Research
PublisherData powered by TypesetAmerican Chemical Society
ISSN08885885
Open AccessNo
Concepts (18)
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    Atmospheric composition
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    Carbon dioxide
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    Free energy
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    Gibbs free energy
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    High pressure effects
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    Nitrogen
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    Oxygen
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    Temperature
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    Thermoanalysis
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    Boundary points
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    COLD GAS EFFICIENCY
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    GASIFICATION TEMPERATURES
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    GASIFYING AGENTS
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    High pressure
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    HIGH PRESSURE AIR
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    NON-STOICHIOMETRIC
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    THERMO DYNAMIC ANALYSIS
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    Gasification