7 Ignition behaviour of biomass is an essential knowledge for plant design and process control 8 of biomass combustion. Understanding of ignition characteristics of its main chemical 9 components, i.e. cellulose, hemicellulose, lignin and their mixtures will allow the further 10 investigation of ignition behaviour of a wider range of biomass feedstock. This paper 11 experimentally investigates the influences of interactions among cellulose, hemicellulose and 12 lignin on the ignition behaviour of biomass by thermogravimetric analysis. Thermal properties 13 of an artificial biomass, consisting of a mixture of the three components will be studied and 14 compared to that of natural biomass in atmospheres of air and nitrogen in terms of their ignition 15 behaviour. The results showed that the identified ignition temperatures of cellulose, 16 hemicellulose and lignin are 410 , 370 and 405 , respectively. It has been found that the 17 influence of their interactions on the ignition behaviour of mixtures is insignificant, indicating 18 that the ignition behaviour of various biomass feedstock could be predicted with high accuracy 19 if the mass fractions of cellulose, hemicellulose and lignin are known. While the deficiencies 20 of the determined mutual interactions would be further improved by the analytical results of 21 the activation energies of cellulose, hemicellulose, lignin, their mixtures as well as natural and 22 artificial biomass in air conditions.23
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