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Title: A thermodynamic analysis of alternative approaches to chemical looping combustion

Abstract

In this article, we review and clarify some of the points made by previous authors regarding chemical looping combustion (CLC). While much of the recent interest in chemical looping combustion has been associated with carbon sequestration, our primary interest here is its potential to increase the thermodynamic efficiency of converting fuel chemical energy into useful work. We expand on several points about the details of CLC that we feel have not previously been sufficiently explored, and suggest alternative (and possibly more practical) approaches that exploit some of the same thermodynamic concepts. We illustrate our key points with {First} and {Second} Law analyses of ideal conceptual processes, which in addition to {CLC} also include isothermal, non-equilibrium, preheated combustion and combustion with thermochemical recuperation. Our results suggest that a significant portion of the potential efficiency benefit of CLC might be achieved without the need to handle and transport large quantities of solid oxygen storage material. Exploitation of this fact may lead to higher efficiency approaches for power generation from hydrocarbon fuels combustion.

Authors:
 [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC); National Transportation Research Center
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1023298
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Energy & Fuels; Journal Volume: 25; Journal Issue: 2
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CARBON SEQUESTRATION; COMBUSTION; EFFICIENCY; HYDROCARBONS; OXYGEN; POWER GENERATION; STORAGE; THERMODYNAMICS; TRANSPORT

Citation Formats

Chakravarthy, Veerathu K, Daw, C Stuart, and Pihl, Josh A. A thermodynamic analysis of alternative approaches to chemical looping combustion. United States: N. p., 2011. Web. doi:10.1021/ef101336m.
Chakravarthy, Veerathu K, Daw, C Stuart, & Pihl, Josh A. A thermodynamic analysis of alternative approaches to chemical looping combustion. United States. doi:10.1021/ef101336m.
Chakravarthy, Veerathu K, Daw, C Stuart, and Pihl, Josh A. Sat . "A thermodynamic analysis of alternative approaches to chemical looping combustion". United States. doi:10.1021/ef101336m.
@article{osti_1023298,
title = {A thermodynamic analysis of alternative approaches to chemical looping combustion},
author = {Chakravarthy, Veerathu K and Daw, C Stuart and Pihl, Josh A},
abstractNote = {In this article, we review and clarify some of the points made by previous authors regarding chemical looping combustion (CLC). While much of the recent interest in chemical looping combustion has been associated with carbon sequestration, our primary interest here is its potential to increase the thermodynamic efficiency of converting fuel chemical energy into useful work. We expand on several points about the details of CLC that we feel have not previously been sufficiently explored, and suggest alternative (and possibly more practical) approaches that exploit some of the same thermodynamic concepts. We illustrate our key points with {First} and {Second} Law analyses of ideal conceptual processes, which in addition to {CLC} also include isothermal, non-equilibrium, preheated combustion and combustion with thermochemical recuperation. Our results suggest that a significant portion of the potential efficiency benefit of CLC might be achieved without the need to handle and transport large quantities of solid oxygen storage material. Exploitation of this fact may lead to higher efficiency approaches for power generation from hydrocarbon fuels combustion.},
doi = {10.1021/ef101336m},
journal = {Energy & Fuels},
number = 2,
volume = 25,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2011},
month = {Sat Jan 01 00:00:00 EST 2011}
}