Investigation of subbituminous coals by thermogravimetry-mass spectrometry. Part 1. formation of hydrocarbon products

Piroska Szabó, G. Várhegyi, Ferenc Till, Tamás Székely

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The thermal decomposition of a series of subbituminous coals from a Hungarian coal basin was investigated by thermogravimetry-mass spectrometry at a heating rate of 20°C min-1. The mass spectrometric intensities of the aliphatic products (CnHm, n ≥ 2) and alkyl-substituted aromatic compounds evidenced similar sharp peaks at about 490°C. Methane evolved at higher temperatures in a broader temperature range. Benzene curves were composed of two overlapping peaks and were resolved by least-squares reaction kinetic calculations. The low and high temperature peaks of the benzene curves were near to the peaks of the aliphatic CnHm (n≤2) compounds and methane respectively. The amounts of the various products were estimated by the integral of the corresponding mass spectrometric intensities and were correlated with coal rank. The probable sources of the various product compounds were discussed.

Original languageEnglish
Pages (from-to)167-177
Number of pages11
JournalThermochimica Acta
Volume170
Issue numberC
DOIs
Publication statusPublished - Nov 12 1990

Fingerprint

Coal
Hydrocarbons
thermogravimetry
coal
Mass spectrometry
Thermogravimetric analysis
mass spectroscopy
hydrocarbons
Methane
Benzene
products
methane
Aromatic compounds
benzene
Heating rate
Reaction kinetics
Temperature
aromatic compounds
Pyrolysis
curves

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Physical and Theoretical Chemistry

Cite this

Investigation of subbituminous coals by thermogravimetry-mass spectrometry. Part 1. formation of hydrocarbon products. / Szabó, Piroska; Várhegyi, G.; Till, Ferenc; Székely, Tamás.

In: Thermochimica Acta, Vol. 170, No. C, 12.11.1990, p. 167-177.

Research output: Contribution to journalArticle

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