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Title: Mossbauer studies on tin bearing catalysts used for hydrogenation of coal
Authors: Sharma, B K
Bhattacharya, K N
Mishra, J
Samuel, P
Mukherjee, D K
Bussiere, P
Issue Date: Nov-1990
Publisher: NISCAIR-CSIR, India
Abstract: Hydroliquefaction of coal has been carried out in a batch autoclave using the Harshaw CoMo 0402T catalyst. Effects of addition of tin and sulphiding on the liquefaction activity have been studied on the basis of total conversion and asphaltene yields. Mossbauer spectroscopy (MBS) for tin and iron has been carried out using the toluene insoluble residues (TIR), while that for tin only has been studied with fresh catalyst samples. SnO2 and thus SnS phase have identified in different combinations for fresh and spent catalysts depending on the samples. The presence of Fe1-xS (pyrrhotite) and Fe2+ along with Fe3+ clay is confirmed in TIR though the stoichiometry of the pyrrhotites varies. STEM and EDS studies suggest sintering of active phases during liquefaction.
Page(s): 1118-1121
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.29A(11) [November 1990]

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