I&EC 41 |
| Pine trees are one of the renewable resources in Korea, which can be converted to bio-oil, gas and char through pyrolysis. In this research, pyrolysis characteristics of pine trees were investigated using thermogravimetric analysis (TGA) at heating rates of 5~20ºC/min. Most of the materials were decomposed at the temperature range from 330ºC to 370ºC depending on the heating rate. Apparent activation energies increased from 145 kJ/mol to 302 kJ/mol, respectively, when the pyrolytic conversion increased from 5% to 95%. The kinetics of pine trees have been studied experimentally and mathematically. Experiments were carried out in a tubing reactor at a temperature of 330 ~ 370ºC and reaction times of 2 ~ 10 minutes. A lump model of combined series and parallel reactions for bio-oil and gas formation was proposed. Conversion data fitted first order kinetics for gas, bio-oil and pine (char). The kinetic parameters were determined by nonlinear least-square regression of the experimental data. It was found from the reaction kinetic constants that the predominant reaction pathway was A (pine) to gas (C1 ~ C4) formation rather than A to bio-oil formation at a temperature of 330~370ºC. |
|
IEC Poster Session
8:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Industrial & Engineering Chemistry |