NOVEL CATALYSIS OF TiO_2 FOR THE CATALYTIC ALCOHOLS SYNTHESIS FROM CO AND H_2O

摘要

Conversion of CO to useful chemicals has been widely investigated by many workers. The typical process for the production of methanol has involved the reaction of carbon monoxide with hydrogen. Copper, zinc and chromium oxides are often selected as catalysts. An alternative process is that CO reacts with H_2O to produce alcohols. It is of particular advantage that no hydrogen is required and CO can be provided as a byproduct from the steel industry, the partial oxidation of coal and typical coal gasification processes. In 1984, R. J. Klinger et al. [1] first reported the reaction (3CO + 2H_2O = CH_3OH + 2CO_2). They considered that a lead oxide and an alkali metal format catalyst combination catalyzed the reaction. However, the catalyst deactivated sbwly with reaction progressing because of the reduction of PbO in the presence of CO. How to keep the catalyst active sites not to be reduced in the presence of CO is the key point for the reaction. In our experiment, it is found that TiO_2 possesses such feature in the presence of CO for the reaction and it shows much better catalytic performance. Some interesting results have been achieved in the present paper.