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Combustion characteristics of Turkish hazelnut shell biomass, lignite coal, and their respective blends via thermogravimetric analysis

Kocabaş, Özlem Züleyha and Okyay, Firuze and Yürüm, Yuda (2015) Combustion characteristics of Turkish hazelnut shell biomass, lignite coal, and their respective blends via thermogravimetric analysis. Journal of Thermal Analysis and Calorimetry, 119 (3). pp. 1723-1729. ISSN 1388-6150 (Print) 1572-8943 (Online)

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Official URL: http://dx.doi.org/10.1007/s10973-014-4348-4

Abstract

Thermal behavior and combustion kinetic of coal, hazelnut shell, and coal/hazelnut shell blends at the proper ratio were investigated with thermogravimetric analysis (TG). Four mass ratios (20, 30, 40, 50 mass%) of coal/biomass blends were prepared and oxidized under dynamic conditions from temperature 298 to 1,173 K at different heating rates. TG analysis indicated that the combustion of blended samples divided into two stages namely devolatilization and char oxidation combined with coal combustion step. The influence of biomass blends on thermal and kinetic behavior of coal was studied under non-isothermal conditions. It was found that the thermal degradation temperature of coal was higher than that of blended samples due to the molecular structure strength. Ozawa-Flynn-Wall model was applied to deal with non-isothermal TG data for the evaluation of the activation energy corresponding to the combustions of coal, hazelnut shell, and coal/hazelnut shell blends. The average activation energy changed in the range of 90.9-215.3 kJ mol(-1), respectively, depending on blending ratio.

Item Type:Article
Uncontrolled Keywords:Biomass; Coal blend; Combustion; Thermogravimetric analysis; Non-isothermal kinetics; Activation energies
Subjects:T Technology > TP Chemical technology
T Technology > TP Chemical technology > TP0315-360 Fuel
ID Code:29099
Deposited By:Yuda Yürüm
Deposited On:05 Jan 2016 11:04
Last Modified:05 Jan 2016 11:04

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