Article: Thermogravimetric and thermal properties analysis of bituminous coal from coalfield fire area Journal: International Journal of Oil, Gas and Coal Technology (IJOGCT) 2016 Vol.13 No.1 pp.60 - 72 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] Inderscience Publishers - linking academia, business and industry through research

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

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

Received: 01 May 2015
Accepted: 20 Sep 2015
Published online: 31 Jul 2016 *

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

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