Publication detail

The influence of model organic compounds on the thermal behavior of lignite humic acids

KUČERÍK, Jiří VÁLKOVÁ, Dana PEKAŘ, Miloslav KAMENÁŘOVÁ, Dagmar

Original Title

Type

abstract

Language

English

Original Abstract

Many papers deal with application of TA in research of humic acids (HA) and related substrata. The process of thermal degradation is desribed to be two-steps. In lower temperature range, aliphatic molecules and many of polar functionalities are degraded; the second step is described to the decay of aromatic moieties. On this base it has been developed an approach to relate weight losses in above-mentioned temperature regions, known as a thermogravimetric index (TGI). Nevertheless, on the base of pyrolitic experiments, it is reasonable to believe, that aliphatic part of humic molecules is in the course of the thermal treating partially converted into more stable aromatic moieties. Since humic acids are a mixture of unknown numbers of molecules of different "quality", the number of thermaly converted molecules is difficult to estimate. Thus the merit of TGI can be biased. In this contribution the attempt is made to elucidate a role of single molecules on TA behavior of HA.

Keywords

humic acids, thermal analysis

Authors

KUČERÍK, Jiří; VÁLKOVÁ, Dana; PEKAŘ, Miloslav; KAMENÁŘOVÁ, Dagmar

Released

15. 6. 2005

Publisher

Ohio State University

Location

Ohio State University

Pages from

Pages to

Pages count

BibTex

@misc{BUT60285,
  author="Jiří {Kučerík} and Dagmar {Kamenářová} and Miloslav {Pekař} and Dana {Švejdová}",
  title="The influence of model organic compounds on the thermal behavior of lignite humic acids",
  booktitle="EMSI/North Central NOM workshop",
  year="2005",
  pages="52--52",
  publisher="Ohio State University",
  address="Ohio State University",
  note="abstract"
}