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Journal of Combustion
Volume 2012 (2012), Article ID 495894, 7 pages
Research Article

Dairy Biomass-Wyoming Coal Blends Fixed Gasification Using Air-Steam for Partial Oxidation

1Department of Mechanical Engineering, University of the Andes, Carrera 1 Este No. 19A-40, Office ML 652, Bogotá, Colombia
2Department of Mechanical Engineering, Texas A&M University, 307 Mechanical Engineering Office Building, College Station, TX 77843, USA

Received 29 June 2011; Revised 8 November 2011; Accepted 30 November 2011

Academic Editor: Claes Tullin

Copyright © 2012 Gerardo Gordillo and Kalyan Annamalai. 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.


Concentrated animal feeding operations such as dairies produce a large amount of manure, termed as dairy biomass (DB), which could serve as renewable feedstock for thermal gasification. DB is a low-quality fuel compared to fossil fuels, and hence the product gases have lower heat content; however, the quality of gases can be improved by blending with coals. This paper deals with air-steam fixed-bed counterflow gasification of dairy biomass-Wyoming coal blend (DBWC). The effects of equivalence ratio (1.6<Φ<6.4) and steam-to-fuel ratio (0.4<S:F<0.8) on peak temperatures, gas composition, gross heating value of the products, and energy recovery are presented. According to experimental results, increasing Φ and (S:F) ratios decreases the peak temperature and increases the H2 and CO2 production, while CO production decreases. On the other hand, the concentrations of CH4 and C2H6 were lower compared to those of other gases and almost not affected by Φ.