Table of Contents
ISRN Chemical Engineering
Volume 2013 (2013), Article ID 565471, 11 pages
http://dx.doi.org/10.1155/2013/565471
Research Article

Gasification Coupled Chemical Looping Combustion of Coal: A Thermodynamic Process Design Study

Chemical Engineering and Process Development Division, National Chemical Laboratory, Pune 411008, India

Received 28 October 2012; Accepted 18 November 2012

Academic Editors: V. Baglio, N. Kakuta, M.-H. Li, and K. Okumura

Copyright © 2013 Sonali A. Borkhade et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A thermodynamic investigation of gasification coupled chemical looping combustion (CLC) of carbon (coal) is presented in this paper. Both steam and CO2 are used for gasification within the temperature range of 500–1200°C. Chemical equilibrium model was considered for the gasifier and CLC fuel reactor. The trends in product compositions and energy requirements of the gasifier, fuel reactor, and air reactor were determined. Coal (carbon) gasification using 1.5 mol H2O and 1.5 mol CO2 per mole carbon at 1 bar pressure and 650°C delivered maximum energy (−390.157 kJ) from the process. Such detailed thermodynamic studies can be useful to design chemical looping combustion processes using different fuels.