ANALYSIS AND THERMAL THERMOGRAVIMETRIC DIFFERENTIAL DIFFERENT PLANT BIOMASS

Abstract

This paper presents the results of thermogravimetric and differential thermal analysis performed on four types of biomass. In the curves of mass loss as a function of temperature (TG) was able to distinguish three main zones: a lower temperature to 200 ºC or stage at which moisture is evaporated and released CO and CO2. Then there was a period of increased mass loss, between 200 and 400 ºC, where the decomposition of cellulose and hemicellulose, and third phase of lower mass loss at temperatures above 580 ºC, which must occur essentially decomposition of lignin. In the case of the cane bagasse 70 % decomposed between 262 ºC and 350 ºC, the greatest loss occurring in mass to 325 ºC, while 17 % was decomposed between 620 and 650 ºC. In the decomposition of coffee husks was a 44 % loss of mass between 200 and 400 ºC and between 580 and 650 ºC decomposed is a 34,86 % of the biomass. Pine sawdust decomposed into a 67,75 % between 200 and 400 ºC, while between 580 and 650 º C was the decomposition of 20.5% of the biomass. In the decomposition of the residue of tobacco the more volatile components and moisture are released at a temperature below 140 ºC, the greatest mass loss took place in a wider range of temperature (227 °C - 460 ºC), distinguishing two areas where the biomass lost 34.3% between 227 and 320 º C, with two peaks, one at 240 ºC and other at 280 ºC.