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Characterization of small‐ and intermediate‐pore zeolites by means of temperature‐programmed desorption of amines
Author(s) -
Christoph Merz,
Fetting Fritz
Publication year - 1996
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270190610
Subject(s) - desorption , dimethylamine , disproportionation , chemistry , trimethylamine , carbonization , adsorption , decomposition , thermal desorption spectroscopy , mass spectrometry , gas chromatography , analytical chemistry (journal) , chemical engineering , chromatography , organic chemistry , catalysis , engineering
This paper presents results of temperature‐programmed desorption (TDP) as a method for studying the acid and shape‐selective properties of small‐ and intermediate‐pore zeolites. A combination of an in situ infrared spectrometer and a downstream gas chromatograph for analyzing the desorption products is used to detect the desorption process. This is followed by a separate, newly installed microbalance facility. The studies shows that a part of the amines, esp. dimethylamine (DMA) and trimethylamine (TMA), adsorbed on the zeolites undergo decomposition, disproportionation and carbonization reaction during the TDP measurements at elevated temperatures. Comparison of the microbalance measurements and the gas chromatographic results give a good picture of the extent of these reaction.