Liquefaction and the Characterization of Coal Derived Liquids of Mengen Lignite

Photochemical Dissolution of Turkish Lignites in Tetralin at Different Irradiation Power and Reaction Times

“…As shown in Table , although the carbon contents of the lignites are similar, their sulfur content and proximate analyses are distinctly different in some respects. The differences in the elemental composition and ash contents of the lignites are the main reasons affecting their dissolution behavior. , Several previous studies have shown that mineral matter acts catalytically in thermal coal dissolution and hydrogen transfer reactions. − In this study, because the mineral matter of Tunçbilek lignite is higher than that of Beypazarı, the higher THF solubles yields from Tunçbilek are obtained under identical reaction conditions. This can be ascribed to the fact that mineral matter inherent in lignites plays its role as a promoter for photochemical dissolution of lignite following the generation of free radicals in the coal structure and the stabilization of these free radicals by hydrogen.…”

Direct liquefaction techniques on lignite coal: A review

“…It is believed that the free radical mechanism is important in the liquefaction of many low-ranking coals, such as Xiaolongtan lignite [13], Shengli lignite [74,75,81], Kansk-Achinsk lignite [78], Elbistan lignite [79], Mengen lignite [85], Beypazari lignite [86], Longkou [66], and Catalan lignite [72,95]. The initial free-radical intermediates formed during this mechanism are stabilized to form oil, AS, and PA by catalytic processes involving gaseous hydrogen and a hydrogen donor solvent (Fig.…”