Abstract
Two microbial cultures—ML-13 (aCandida sp.) and LSC (a fungal isolate from the University of Arkansas)—have been employed in the direct liquefaction of Louisiana lignite. Lignite samples were pretreated with nitric acid and microbial culture broths at elevated temperatures and pressures. Subsequent treatment with active cultures and culture derivatives resulted in significant solubilization of the lignite. Up to 50% liquefaction of pretreated coal (20% HNO3 at ambient temperature and pressure) was observed in 4 d with ML-13 cultures, whereas almost 80% liquefaction occurred in a similar time period when exposing pretreated lignite to an autoclaved, cell-free culture broth.
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Personal communication with David Williamson, Manager—Fuel Res. Dev. Dept., CLECO, Mansfield, LA.
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Rao, A., Maxey, A., Elmore, B.B. et al. Microbial liquefaction of lignite pretreated with dilute acid at elevated temperature and pressure. Appl Biochem Biotechnol 45, 81–91 (1994). https://doi.org/10.1007/BF02941789
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DOI: https://doi.org/10.1007/BF02941789