Effect of Acid Treatment on Volumetric Swelling Ratios of Coals

Authors

NEJAT MESCİ
AKİF ŞENELT
TANER TOĞRUL
ARAL OLCAY

DOI

-

Abstract

To remove Ca^{2+} ions, six low rank coals and one coking coal were treated with 0.1 and l.0 N HC1 for 24 h. IR spectra and proximate analysis of the lignites indicated that only slight structural changes had occurred during acid treatment. The swelling ratios of parent and acid-treated coal samples showed that removal of Ca^{2+} resulted in an increase in the swelling ratios. Higher swelling ratios were obtained with acid-washed coal samples. While the highest swelling ratios of the parent lignites were obtained in ethylenediamine, those of acid-treated samples were obtained in pyridine and dimethylformamide.

First Page

397

Last Page

404

Recommended Citation

MESCİ, NEJAT; ŞENELT, AKİF; TOĞRUL, TANER; and OLCAY, ARAL (2001) "Effect of Acid Treatment on Volumetric Swelling Ratios of Coals," Turkish Journal of Chemistry: Vol. 25: No. 4, Article 2. Available at: https://journals.tubitak.gov.tr/chem/vol25/iss4/2