RELATION BETWEEN SWELLING OF LIGNITES AND THE CHARACTERISTICS OF SWELLING AGENTS

Relation between swelling ratio of lignites and lignite and solvent ch aracteristics was developed using a third level factorial design with three variables; percent carbon content, particle size of the lignite and electron donor number of the solvent. The results indicate that pa rticle size of the Lignite does not affect the swelling ratio. While s welling ratio of the lignites decreases slightly with increasing carbo n content of the lignites electron donor number of the solvent has a n oticeable effect on the swelling ratio.