Thermogravimetric analysis of selected coal-bearing strata kaolinite


Autoria(s): Frost, Ray L.; Cheng, Hongfei; Yang, Jing
Data(s)

01/07/2010

Resumo

Two kinds of coal-bearing kaolinite from China were analysed by X-ray diffraction (XRD), Thermogravimetric analysis-mass spectrometry (TG-MS), infrared emission spectroscopy. Thermal decomposition occurs in a series of steps attributed to (a) desorption of water at 68 °C for Datong coal bearing strata kaolinite and 56 °C for Xiaoxian with mass losses of 0.36 % and 0.51 % (b) decarbonization at 456 °C for Datong coal bearing strata kaolinite and 431 °C for Xiaoxian kaolinite, (c) dehydroxylation takes place in two steps at 589 and 633 °C for Datong coal bearing strata kaolinite and at 507 °C and 579 °C for Xiaoxian kaolinite. This mineral were further characterised by infrared emission spectroscopy (IES). Well defined hydroxyl stretching bands at around 3695, 3679, 3652 and 3625 cm-1 are observed. At 650 °C all intensity in these bands is lost in harmony with the thermal analysis results. Characteristic functional groups from coal are observed at 1918, 1724 and 1459 cm-1. The intensity of these bands decrease by thermal treatment and is lost by 700 °C.

Formato

application/pdf

Identificador

http://eprints.qut.edu.au/33649/

Publicador

Elseiver BV

Relação

http://eprints.qut.edu.au/33649/1/c33649.pdf

DOI:10.1016/j.tca.2010.05.004

Frost, Ray L., Cheng, Hongfei, & Yang, Jing (2010) Thermogravimetric analysis of selected coal-bearing strata kaolinite. Thermochimica Acta, 507/8, pp. 84-90.

Direitos

Copyright 2010 Elsevier BV

Fonte

Chemistry; Faculty of Science and Technology

Palavras-Chave #030199 Analytical Chemistry not elsewhere classified #030600 PHYSICAL CHEMISTRY (INCL. STRUCTURAL) #030603 Colloid and Surface Chemistry #030606 Structural Chemistry and Spectroscopy #Thermal analysis; thermogravimetry, Coal-bearing; Kaolinite; infrared emission spectroscopy
Tipo

Journal Article