Abstract

Analysis on pyrolysis and Infrared process by TG-FTIR using Platycladus orientalis in different particle size. The results show that Platycladus orientalis pyrolysis process can be divided into four stages: the first stage from 30 to120°C, which most caused by water molecules adsorpted on the surface of Platycladus orientalis samples during thermal desorption, free water and bound water evaporate in this stage, with a mass loss of 5%. The second stage from 120 to170°C involves the pyrolysis of hemicelluloses and unstable cellulose, with a mass loss of 4%. The third stage from 200 to 400°C. Maximum pyrolysis rate is about achieved in this stage at 365°C, weight loss of this stage is about 50%, due to the thermal decomposition of cellulose, including dehydration, depolymerization and decomposition of anhydroglucose unit. In the final stage, which occurs beyond 430°C, the pyrolysis of lignin and charring of cellulose occur. In the three-dimensional IR spectrum, the Platycladus orientalis samples exhibit higher absorbance at 200, 525, 830, 1100 and 1420 sec during thermal decomposition. The smaller particle size can be decomposing more thoroughly and rapidly. The particle size of Platycladus orientalis samples which less than 0 mm has a smaller influence on the thermal decomposition. Wood vinegar is formed from the pyrolysis stage until the charring stage.

Keywords:

Particle size, Platycladus orientalis, pyrolysis, TG-FTIR,

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