Publication detail

Regenerated humic acids obtained by the air oxidation of South Moravian lignite. Part. 1. Production and characterization

KUČERÍK, J. CIHLÁŘ, Z. VLČKOVÁ, Z. DRASTÍK, M.

Original Title

Type

journal article - other

Language

English

Original Abstract

The influence of lignite air oxidation on the yield and chemical/physical character of regenerated humic acids (RHA) has been studied. RHA were produced under different experimental conditions, i.e. both in static and fluid reactor. Oxidation in the fluid reactor brought first a decrease and after a certain period increase in the yield of RHA. The same observation was done in case of static reactor. It has been verified that higher temperature during the oxidation supports the production of RHA. Despite the difference in the yield of RHA (increase up to 75%) their chemical character was in all cases fairly similar. Some tiny differences were revealed using FTIR which showed the increase in number of ester bonds in RHA produced mainly at temperatures above 80 C causing a significant increase in apparent molecular weight as evaluated by HPSEC.

Keywords

lignite, regenerated humic acids, air oxidation

Authors

KUČERÍK, J.; CIHLÁŘ, Z.; VLČKOVÁ, Z.; DRASTÍK, M.

RIV year

2008

Released

1. 12. 2008

Publisher

Slovnaft

Location

Slovenská Republika

ISBN

1335-3055

Periodical

Petroleum and Coal

Year of study

Number

State

Slovak Republic

Pages from

Pages to

Pages count

BibTex

@article{BUT47250,
  author="Jiří {Kučerík} and Zdeněk {Cihlář} and Zoja {Vlčková} and Martin {Drastík}",
  title="Regenerated humic acids obtained by the air oxidation of South Moravian lignite. Part. 1. Production and characterization",
  journal="Petroleum and Coal",
  year="2008",
  volume="50",
  number="3",
  pages="49--55",
  issn="1335-3055"
}