Solubilization of bituminous and lignite coals by chemically and biologically synthesized surfactants

Abstract

Tween 80 (polyoxyethylene sorbitan monooleate), Triton X‐100 (nonaethylene glycol octylphenol ether), and SDS (sodium dodecyl sulfate) solubilized several components of Mississippi Wilcox lignite and Illinois No. 6 bituminous coal. Tween 80 extraction of alkali‐soluble Ugljevik lignite resulted in an increase in hydrogen content and decreases in the nitrogen and sulfur contents of undissolved coal solids. Biosurfactant‐containing cell‐free extracts of Bacillus licheniformis solubilized a 53 000 Da coal component of Mississippi Wilcox lignite. The results suggest that solubilization of coal organic components by chemically‐ and biologically‐synthesized surfactants has potential in terms of upgrading coals.

Biossurfactantes: propriedades e aplicações

“…O biodispersan, polissacarídeo aniônico, produzido por A. calcoaceticus A2, foi utilizado na prevenção da floculação e dispersão de misturas de pedra calcárea e água 42 . Biossurfactantes de C. bombicola demonstraram eficiência na solubilização de carvão 43 .…”

Biotechnology of Coal

“…POLMAN and coworkers used three chemosurfactants (Tween 80, Triton-X-100, SDS) and two biological surfactants (from the bacterium Bacillus licheniformis and the yeast Candida bombicola) to "dissolve" different coals or coal fractions (POLMAN et al, 1994a;BRECKENRIDGE and POLMAN, 1994). POLMAN and coworkers used three chemosurfactants (Tween 80, Triton-X-100, SDS) and two biological surfactants (from the bacterium Bacillus licheniformis and the yeast Candida bombicola) to "dissolve" different coals or coal fractions (POLMAN et al, 1994a;BRECKENRIDGE and POLMAN, 1994).…”

Extraction optimization and quality evaluation of humic acids from lignite using the cell-free filtrate of Penicillium ortum MJ51

“…15 Furthermore, it has been shown that lignite components can be solubilized using biosurfactant-containing cell-free ltrate (CFF) extracted from Bacillus licheniformis. 21 Most coal-solubilizing bacteria and actinomycetes primarily rely on alkaline action and chelation, while fungi mostly rely on enzymes, but also utilize the above substances to a lesser degree. 22,23 Although extracellular metabolites are widely known for their role in the lignite solubilization process, research on process optimization of HA extraction from lignite using extracellular CFF is still scarce.…”