In this study, the devolatilization behavior of eastern Mediterranean hazelnut, almond, and sunfl ower residue was studied

using a TGA–FTIR laboratory-scale setup. The original biomasses were fractionated using the Van Soest detergent analysis.

Both the original and fractionated biomasses were investigated. The reaction temperature was increased to 900 °C using a

heating rate of 2 °Cmin −1 . The pyrolysis of lignin produced the largest gas production, with CO 2 constituting up the bulk of

the gas mixture. CO is the second highest-yield gas and is primarily formed from the samples of cellulose and lignin. For

the lignin samples, the pyrolysis operation yielded the maximum amount of char, while the combustion of the lignin chars

produced the highest amount of gas yields. On the other hand, lignin samples, particularly almond lignin, have the lowest

tar production. Due to the high ash content the sunfl ower stalk sample devolatilized at a lower temperature with respect to

the rest of the samples, resulting at a mass loss peak at lower temperature. The hazelnut lignin showed the mass loss peak at

the highest temperature. Generally, CO 2 showed the highest mass yield, and it was mainly produced from the cellulose and

whole biomass samples. Among all samples CH 4 was produced in minor quantities and mostly in lignin devolatilization.

Furthermore, the devolatilization behavior of the fractionated biopolymers is not enough to suffi ciently predict the behavior

of the whole biomass sample. The results described in this paper can help further the understanding of thermal processes

where almond, hazelnut, and sunfl ower residues from the eastern Mediterranean region, and their fractionated-derived

products are involved.