- Turkish Journal of Chemistry
- Vol: 25 Issue: 4
- Effect of Acid Treatment on Volumetric Swelling Ratios of Coals
Effect of Acid Treatment on Volumetric Swelling Ratios of Coals
Authors : Nejat Mesci
Pages : 397-404
View : 10 | Download : 6
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :To remove Ca2+ 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 Ca2+ 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.Keywords : Turk. J. Chem., 25, (2001), 397-404. Full text: pdf Other articles published in the same issue: Turk. J. Chem., vol.25, iss.4.