4.Mo触媒を用いた石炭液化における水の促進効果の解明 : ジナフチルエーテルの接触水素化

概要

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Addition of water has a strong promoting effect on low-severity catalytic coal hydroliquefaction using in-situ generated MoS_2 catalyst. In order to clarify the role of adding water, model reactions of 2,2'-dinaphthyl ether were carried out using ammonium tetrathiomolybdate (ATTM) as catalyst precursor in the presence and absence of H_2O or D_2O under hydroliquefaction conditions. Addition of water significantly promoted DNE conversions and the yields of C-O bond cleavage products as well as their hydrogenation. In order to clarify the effect of water on the catalytic activity, two-step reactions were carried out. Catalysts were prepared from the runs using ATTM with and without added water, and then DNE was hydrogenated with and without added water. After the preparation of catalysts using ATTM and water in the first step, removal of water prior to the reaction causes complete conversion of DNE; on the other hand, after the preparation of active catalysts using ATTM, addition of water significantly decreased the DNE conversion. These results suggest that addition of proper amount of water is effective for the in-situ generation of active MoS_2 catalyst for hydrogenation of DNE, but water itself does not have promoting effect on DNE conversion.
一般社団法人日本エネルギー学会の論文
1998-11-19