Thermogravimetric-mass spectrometric characterization of the thermal decomposition of sunflower stem

G. Várhegyi, E. Jakab, Ferenc Till, Tamas Szekely

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The thermal decomposition of sunflower stem was studied. Mass spectra and thermogravimetric data were simultaneously measured at a heating rate of 10°C/min in argon flow. The thermal decomposition of the untreated sunflower stem showed marked differences from wood and other lignocellulosic materials. The temperatures of the hemicellulose and cellulose decompositions overlapped each other while a separate reaction due to the decomposition of the lignin component appeared at higher temperatures. The net char yield (residue minus mineral content) was high, 25%. Addition of inorganic salts from dilute water solution resulted in only minor changes. Acid washing increased the temperature of the differential thermogravimetric peak maximum by 77°C and changed other characteristics of the decomposition, too. Addition of 0.9% FeSO4 to the acid-washed samples resulted in noticeable dehydration reactions and catalyzed the cellulose component to decompose at lower temperatures.

Original languageEnglish
Pages (from-to)755-760
Number of pages6
JournalEnergy and Fuels
Volume3
Issue number6
Publication statusPublished - Nov 1989

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Pyrolysis
Decomposition
Cellulose
Temperature
Acids
Lignin
Argon
Heating rate
Dehydration
Washing
Minerals
Wood
Salts
Water

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

Thermogravimetric-mass spectrometric characterization of the thermal decomposition of sunflower stem. / Várhegyi, G.; Jakab, E.; Till, Ferenc; Szekely, Tamas.

In: Energy and Fuels, Vol. 3, No. 6, 11.1989, p. 755-760.

Research output: Contribution to journalArticle

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