Detail publikace

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

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

Originální název

Typ

abstrakt

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

humic acids, thermal analysis

Autoři

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

Vydáno

15. 6. 2005

Nakladatel

Ohio State University

Místo

Ohio State University

Strany od

Strany do

Strany počet

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"
}