THE EFFECT OF RADIATION TO ENHANCE THE BIOCONVERSION OF COAL

Authors
Citation
Lg. Gazso, THE EFFECT OF RADIATION TO ENHANCE THE BIOCONVERSION OF COAL, Fuel processing technology, 52(1-3), 1997, pp. 239-245
Citations number
14
Journal title
ISSN journal
03783820
Volume
52
Issue
1-3
Year of publication
1997
Pages
239 - 245
Database
ISI
SICI code
0378-3820(1997)52:1-3<239:TEORTE>2.0.ZU;2-T
Abstract
Oxidizing pretreatment of low rank coals can enhance their water solub ility. Oxidizing species ((OH)-O-., HO2., O-2(.-), H2O2) deriving from the radiolysis of water are also important agents in the decompositio n of coal. Radiation treatment of aqueous slurry of lignite and sub-bi tuminous coal in the dose range of 25-100 kGy increases the absorption of the aqueous phase in the interval of 250-420 nm, showing a maximum at 260 nm. Increased solubility of coal is due to the oxidation of or ganic material and reduction in the degree of polymerization. Conversi on of coal to low molecular weight fuels requires a multistep physical , chemical and biological treatment. Radiation as a physical pretreatm ent offers an alternative application for coal degradation. (C) 1997 E lsevier Science B.V.