DOIONLINE

DOIONLINE NO - IJMPE-IRAJ-DOIONLINE-15848

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International Journal of Mechanical and Production Engineering (IJMPE)-IJMPE
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Volume Issue
Issue
Volume-7,Issue-7  ( Jul, 2019 )
Paper Title
Thermo Gravimetric Study on Thermal and Combustion Characteristics of Thai Lignite, Rice Husk, and their Mixtures
Author Name
Rajita Jirapraditkul, Saran Chinwanno, Nichaporn Sararak, Vladimiri. Kuprianov
Affilition
School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology, Thammasat University, P.O. Box 22, ThammasatRangsit Post Office, PathumThani 12121, Thailand.
Pages
35-40
Abstract
The combustion behavior and characteristics of Thai lignite, rice husk, and their blends in different proportions were investigated in a thermogravimetric analyzer. In each thermogravimetric test, a 15-mg sample (lignite/biomass/blend) was heated in the analyzer furnace from 30 °C to 900 °C, using dry air as a furnace gas. Three test series, aimed at studying the effects of (i) lignite and biomass proportions in the blend, (ii) heating rate, and (iii) flow rate of the furnace gas on the TG/DTG profiles (characterizing the decomposition behavior of the samples), were performed. The characteristic temperatures were obtained from the analysis of TG/DTG curves for the selected fuel options and operating conditions. The kinetic parameters were determined for a model predicting the time-related decomposition of lignite/biomass blends for different operating conditions, using the Coats-Redfern method. The experimental results revealed excellent combustion properties of both selected fuels. However, rice husk exhibited higher thermal and combustion reactivity, compared to Thai lignite, and therefore can be used as a secondary/reburn fuel in fuel-staged co-firing systems, leading to lower environmental impacts. Keywords - Thai lignite, Rice husk, Thermogravimetric analysis, Operating conditions, Kinetic parameters.
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