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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 23, 2009
Accepted September 15, 2009

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Thermogravimetric analysis of longan seed biomass with a two-parallel reactions model

Supunnee Junpirom Chaiyot Tangsathitkulchai^† Malee Tangsathitkulchai¹

School of Chemical Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand ¹School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand

Korean Journal of Chemical Engineering, March 2010, 27(3), 791-801(11), 10.1007/s11814-010-0118-6

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Abstract

The kinetic analysis of pyrolysis process of longan seed was performed in a thermogravimetric analyzer. All experimental runs were carried out by using an initial sample mass of 15 mg and final temperature of 650 ℃ under the inert atmosphere of nitrogen. Particle sizes in the range from 0.05-2.1 mm and the heating rates from 5-100 ℃/min were employed to investigate their effects on the thermogram and the kinetic parameters. The TG curves generally showed sigmoid shape and displayed one major peak in DTG curve. The main devolatilization of longan seed occurred_x000D_ over the temperature range of 210-330 ℃. It was found that heat transfer resistance in a particle could be reduced either by decreasing the size of particle or increasing the heating rate. The thermal decomposition of longan seed could be well described by the two-parallel reactions kinetic model. This analysis of reaction kinetic gave the values of activation energy for the decomposition of the two fractions in the model corresponding closely to those of hemicellulose and lignin.

Keywords

Pyrolysis Devolatilization Two Parallel Reactions Model Longan Seed

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