Int. J. of Oil, Gas and Coal Technology   »   2016 Vol.13, No.1

 

 

Title: Thermogravimetric and thermal properties analysis of bituminous coal from coalfield fire area

 

Authors: Hu Wen; Jun-Hui Lu; Yang Xiao; Jun Deng

 

Addresses:
Key Laboratory of Western Mine Exploitation and Hazard Prevention of Ministry of Education, Xi'an University of Science and Technology, Xi'an Yanta Road No. 58, 10054, Xi'an, Shaanxi Province, China
Key Laboratory of Western Mine Exploitation and Hazard Prevention of Ministry of Education, Xi'an University of Science and Technology, Xi'an Yanta Road No. 58, 10054, Xi'an, Shaanxi Province, China
Key Laboratory of Western Mine Exploitation and Hazard Prevention of Ministry of Education, Xi'an University of Science and Technology, Xi'an Yanta Road No. 58, 10054, Xi'an, Shaanxi Province, China
Key Laboratory of Western Mine Exploitation and Hazard Prevention of Ministry of Education, Xi'an University of Science and Technology, Xi'an Yanta Road No. 58, 10054, Xi'an, Shaanxi Province, China

 

Abstract: This paper combined the thermogravimetry TG209F1 Libra with Netzsch LFA 457 to study the thermogravimetric behaviours from 25°C-650°C and measured thermal properties from 25°C-300°C for bituminous coals taken from Wuda coalfield. The characteristic temperatures and different stages of reaction were determined using thermogravimetry (TG-DTG). The thermal diffusivity of the bituminous coal decreases with increasing temperature (from 0.11 ± 0.03 mm2 × s−1 to 0.078 + 0.02 mm2 × s−1, depending on the material). Moreover, the specific heat capacity of coal samples presented closely a linear increase with increasing temperature up to 300°C, thermal conductivity of coal appeared a cubic polynomial growth (0.117 - 0.175 W / (m × K)). It might happen because that the thermal expansion plays a more important role than the release of gases and volatile on the quantity of pores. [Received: April 1, 2015; Accepted: September 20, 2015]

 

Keywords: bituminous coal; characteristic temperature; thermogravimetry TG–DTG; thermal diffusivity; specific heat capacity; thermal conductivity; China.

 

DOI: 10.1504/IJOGCT.2016.078042

 

Int. J. of Oil, Gas and Coal Technology, 2016 Vol.13, No.1, pp.60 - 72

 

Submission date: 01 Apr 2015
Date of acceptance: 20 Sep 2015
Available online: 25 Jul 2016

 

 

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