Resumo

JIMENEZ, José A et al. Co, Fe AND Ni CATALYSTS SUPPORTED ON COKE FOR DIRECT COAL LIQUEFACTION. Rev.Colomb.Quim. [online]. 2008, vol.37, n.2, pp.233-242. ISSN 0120-2804.

Transition metal catalysts supported on coke were prepared by impregnation with a solution of complex of metal-thiourea, that is produced from salt precursors of cobalt chloride, nickel chloride or iron sulfate and ammonium. Sulphide formation on the support surface was generated by decomposition of the metal complex. The catalysts obtained were used in direct coal liquefaction of a medium volatile bituminous coal (Yerbabuena No 1) from Cundinamarca using a 250 mL Parr reactor at 723 K, and a hydrogen pressure of 8.0 MPa, with a reaction time of 1 h and using tetralin as hydrogen-donor solvent. The catalytic results show, for all samples, both a good coal conversion and an enhancement of the yield of oils, this indicates that the proposed preparation method of catalyst is effective and, that eventually, the H2S sulphidation conventional process could be replaced.

Palavras-chave : coal; direct liquefaction; catalysis; transitions metals.

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