A Piezoelectric crystal detector for continuous monitoring of water evolved during thermal decomposition reactions

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A method for the continuous monitoring of water vapour evolved during thermal decomposition reactions is developed based on the reversible adsorption of water on a bare piezoelectric crystal with nickel electrodes. Gaseous decomposition products formed in the furnace chamber of the thermoanalytical equipment are collected and transported to the detector cell by the carrier gas. A linear relationship exists between the decrease in vibrational frequency of the crystal and the concentration of water in the carrier gas up to 900 μg/l. H2O [1200 ppm (v/v)]. The signal curve of the piezoelectric water monitor can be recorded simultaneously along with the TG, DTG and DTA curves and used to identify the decomposition step(s) in which water was formed. CO, CO2 and low molecular weight hydrocarbons do not interfere. Condensable organic crack products can be removed by a suitable pretrap.

Original languageEnglish
Pages (from-to)1083-1087
Number of pages5
JournalTalanta
Volume41
Issue number7
DOIs
Publication statusPublished - 1994

Fingerprint

Pyrolysis
Hot Temperature
Detectors
Crystals
Water
Monitoring
Gases
Decomposition
Steam
Vibrational spectra
Carbon Monoxide
Hydrocarbons
Nickel
Differential thermal analysis
Adsorption
Electrodes
Furnaces
Molecular Weight
Molecular weight
Cracks

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

Cite this

A Piezoelectric crystal detector for continuous monitoring of water evolved during thermal decomposition reactions. / Kristóf, J.

In: Talanta, Vol. 41, No. 7, 1994, p. 1083-1087.

Research output: Contribution to journalArticle

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