Study onto Bioliquefaction Conditions of Zhaotong Lignite

Abstract

In the experiment, 6mol/L, 8mol/L, 10mol/L three different concentrations of nitric acid were used to oxidize 0.15~0.25mm,0.25~0.50mm, +0.50mm three different sizes of particle sizes for 24, 48 and 60h, respectively. Nine different kinds of coal pretreated samples were used. Then the dominant coal samples were screened in DOX medium. Finally, bioliquefaction test for 3 kinds of dominant coal samples were selected in DOX liquid medium with different concentrations of Na+, Mg2+, and Cu2+, to investigate the effects of the type and amount of trace elements, coal sample on the dissolution test. Results show that the liquefaction effect of 8# coal sample is optimum, with best solution of adding Cu2+ 0.05g/L. Its absorbance at 450nm is 18.9, and the peroxidase activity is 233U in 12th days.