Biodesulfurization is one of the perspective methods for production of friendly fuels. Reductive
pyrolysis in mode of atmospheric pressure temperature programmed reduction (AP-TPR) combined
with varied detection systems gave us possibility to obtain more s a t isfactory explanation of
biodesulfurization effects. AP-TPR coupled “on-line” and “off-line” with potentiometry, massspectrometry
and GC/MS analysis with inner sulfur standards for quantification were applied.
Subbituminous coal from “Pirin” basin, Bulgaria was treated by three different types of
microorganisms with maximal desulfurization effect for total (26%) and organic sulfur (13%).
Namely, two types white rot fungi – “Trametes Versicolor , “Phanerochaeta Chrysosporium” and one
mixed bacterial culture were used. Improved sulfur balance determination was registered
