Abstract
Ruthenium (Ru) catalysts are known to dissociate the CO bond easily and to be effective for methanation or Fischer-Tropsch synthesis. However, several Ru systems yield oxygen-containing compounds. The reasons for these oxygenate synthesis activities have not been well discussed. Raney Ru catalysts have also been found active for methanol synthesis from CO and H{sub 2}. Methanol can be synthesized at a temperature as low as 353 K on Raney Ru. Fine particles of raney Ru powder catalyst can be suspended in a solution for the low-temperature methanol synthesis process in which a reduced Ni complex catalyst is supposed to be used. A new methanol process under low temperature and low pressure could save much of the energy required for the process, and new catalysts including Raney Ru should be studied in detail. The point of interest in the case of Raney Ru is why methanol is produced selectively, although Ru powder gives hydrocarbon exclusively. Here, the authors tried to identify the surface state of raney Ru that is related to methanol selectivity.
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