%0 Journal Article
%T Pyrolysis Kinetics of Physical Components of Wood and Wood-Polymers Using Isoconversion Method
%A Wenjia Jin
%A Kaushlendra Singh
%A John Zondlo
%J Agriculture
%D 2013
%I MDPI AG
%R 10.3390/agriculture3010012
%X Two hardwood species, namely red oak and yellow-poplar, were separated into their bark, sapwood and heartwood components. The samples were tested for calorific value, specific gravity, proximate analysis, mineral composition, chemical composition, ultimate analysis, and thermo-chemical decomposition behavior. In addition, the thermo-chemical decomposition behaviors of cellulose, xylan, and lignin polymers were also tested. Thermo-chemical decomposition behavior was assessed using a thermo-gravimetric (TGA) system by heating the sample from 50 ˇăC to 700 ˇăC at the heating rates of 10, 30 and 50 ˇăC/min under nitrogen. The activation energy was calculated for various fractional conversion values using the isoconversion method. The results showed that char yields of lignin, cellulose and xylan were 41.43%, 4.45% and 1.89%, respectively, at the end of pyrolysis. Furthermore, cellulose, xylan and lignin decomposed dramatically in the temperature range of 320 ˇăC to 360 ˇăC, 150 ˇăC to 230 ˇăC and 100 ˇăC to 410 ˇăC, respectively, with decomposition peaks occurring at 340 ˇăC, 200 ˇăC and 340 ˇăC, respectively. In addition, the maximum activation energy for cellulose was 381 kJ/mol at 360 ˇăC and for xylan it was 348 kJ/mol at 210 ˇăC.
%K bioenergy
%K torrefaction
%K hardwood components
%K activation energy
%U http://www.mdpi.com/2077-0472/3/1/12