Journal de la science des matériaux et des nanomatériaux

Abstrait

Biomass Behavior upon Fast Pyrolysis in Inert and in CO2-Rich Atmospheres: Role of Lignin, Hemicellulose and Cellulose Content

J. Marcos FernÃÆández-Pradas

The gift paintings specialize in the pleasant of char and number one tar comprised of speedy pyrolysis in N2 and CO2 of lignocellulosic biomasses: walnut shells (lignin-wealthy), straw (hemicellulose-wealthy) and pinewood (cellulose-wealthy). Heat remedies are completed in a heated strip reactor (HSR) at 1573 and 2073 K for three s, with a heating charge of 104 K/s. The system lets in for quenching the volatiles as quickly as they may be emitted. Chars are analysed with the aid of using thermo gravimetric evaluation in air. Results are in comparison with the goods received from uncooked lignin, natural cellulose and natural hemicellulose. Cellulose and hemicellulose tars are ruled with the aid of using anhydrous monosaccharide’s, which might be scarce in straw tar and ample in walnut shells tar. Polycyclic fragrant hydrocarbons PAHs are gift with inside the number one merchandise, especially for walnut shells. The maximum reactive char is the only received from straw and the least reactive is the walnut shells char [1]. Severe warmth remedy and a CO2 ecosystem generate extra char additives with better and decrease reactivity. The extra reactive char thing might also additionally rise up from cross-linking reactions concerning the monosaccharide’s (for which the end result reduced in tar), while the much less reactive thing arises from thermal annealing and graphitization. Thus, the pyrolytic conduct of biomasses cannot be reconstructed with a trifling addition of the lignin/cellulose/hemicellulose contribution, thinking of their content material with inside the biomass.