Table of Contents
Biotechnology Research International
Volume 2012, Article ID 165202, 12 pages
Research Article

Physiochemical Characterization of Briquettes Made from Different Feedstocks

1Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, SD 57007, USA
2Department of Bioenergy, Tamil Nadu Agricultural University, Coimbatore 641003, India

Received 9 March 2012; Revised 12 April 2012; Accepted 16 April 2012

Academic Editor: Jianmin Xing

Copyright © 2012 C. Karunanithy 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.


Densification of biomass can address handling, transportation, and storage problems and also lend itself to an automated loading and unloading of transport vehicles and storage systems. The purpose of this study is to compare the physicochemical properties of briquettes made from different feedstocks. Feedstocks such as corn stover, switchgrass, prairie cord grass, sawdust, pigeon pea grass, and cotton stalk were densified using a briquetting system. Physical characterization includes particle size distribution, geometrical mean diameter (GMD), densities (bulk and true), porosity, and glass transition temperature. The compositional analysis of control and briquettes was also performed. Statistical analyses confirmed the existence of significant differences in these physical properties and chemical composition of control and briquettes. Correlation analysis confirms the contribution of lignin to bulk density and durability. Among the feedstocks tested, cotton stalk had the highest bulk density of 964 kg/m3 which is an elevenfold increase compared to control cotton stalk. Corn stover and pigeon pea grass had the highest (96.6%) and lowest (61%) durability.