Evolved gas analysis of coal-derived pyrite/marcasite
Cheng, Hongfei, Liu, Qinfu, Zhang, Shuai, Wang, Shaoqing, & Frost, Ray L. (2014) Evolved gas analysis of coal-derived pyrite/marcasite. Journal of Thermal Analysis and Calorimetry, 116(2), pp. 887-894.
The products evolved during the thermal decomposition of the coal-derived pyrite/marcasite were studied using simultaneous thermogravimetry coupled with Fourier-transform infrared spectroscopy and mass spectrometry (TG-FTIR–MS) technique. The main gases and volatile products released during the thermal decomposition of the coal-derived pyrite/marcasite are water (H2O), carbon dioxide (CO2), and sulfur dioxide (SO2). The results showed that the evolved products obtained were mainly divided into two processes: (1) the main evolved product H2O is mainly released at below 300 °C; (2) under the temperature of 450–650 °C, the main evolved products are SO2 and small amount of CO2. It is worth mentioning that SO3 was not observed as a product as no peak was observed in the m/z = 80 curve. The chemical substance SO2 is present as the main gaseous product in the thermal decomposition for the sample. The coal-derived pyrite/marcasite is different from mineral pyrite in thermal decomposition temperature. The mass spectrometric analysis results are in good agreement with the infrared spectroscopic analysis of the evolved gases. These results give the evidence on the thermal decomposition products and make all explanations have the sufficient evidence. Therefore, TG–MS–IR is a powerful tool for the investigation of gas evolution from the thermal decomposition of materials.
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|Item Type:||Journal Article|
|Keywords:||Pyrite, Marcasite, Thermal decomposition, Evolved gas, Sulfur dioxide|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2014 Akademiai Kiado, Budapest, Hungary|
|Copyright Statement:||Note: the archived file is an accepted manuscript, not the final published version of the paper, published version maybe viewed at pubisher's website: http://dx.doi.org/10.1007/s10973-013-3595-0|
|Deposited On:||14 Apr 2015 23:56|
|Last Modified:||17 Apr 2015 20:20|
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