The paper proves that briquettes of lignocellulosic crop residues have higher activation energy levels of intrinsic biopolymers as compared to these energy levels in wood, especially in context with the hemicellulosic and cellulosic segment. Binderless briquettes made of residues from pigeon pea and soybean crops were analyzed in comparison with wood. Thermal decompositions of these biofuels were experimented by thermogravimetry under pyrolysis environment and the transitions of the thermogravimetric signals were explained. Popular isoconversional kinetics method, namely integral Ozawa-Flynn-Wall was used to evaluate and compare the activation energies. Kinetics analyzed that wood was thermally weaker than the briquettes. (C) 2014 Elsevier Ltd. All rights reserved.