Table of Contents
International Scholarly Research Notices
Volume 2014 (2014), Article ID 654946, 9 pages
http://dx.doi.org/10.1155/2014/654946
Research Article

Analysis of Hydrogen Generation through Thermochemical Gasification of Coconut Shell Using Thermodynamic Equilibrium Model Considering Char and Tar

Department of Mechanical Engineering, National Institute of Technology Calicut, Calicut, Kerala 673601, India

Received 24 May 2014; Revised 7 September 2014; Accepted 8 September 2014; Published 4 November 2014

Academic Editor: J. Alfredo Hernandez

Copyright © 2014 Shanmughom Rupesh 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

This work investigates the potential of coconut shell for air-steam gasification using thermodynamic equilibrium model. A thermodynamic equilibrium model considering tar and realistic char conversion was developed using MATLAB software to predict the product gas composition. After comparing it with experimental results the prediction capability of the model is enhanced by multiplying equilibrium constants with suitable coefficients. The modified model is used to study the effect of key process parameters like temperature, steam to biomass ratio, and equivalence ratio on product gas yield, composition, and heating value of syngas along with gasification efficiency. For a steam to biomass ratio of unity, the maximum mole fraction of hydrogen in the product gas is found to be 36.14% with a lower heating value of 7.49 MJ/Nm3 at a gasification temperature of 1500 K and equivalence ratio of 0.15.