Abstract
The decomposition of methanol was investigated over a variety of alumina (Al2O3) supported rhodium (Rh) catalysts. Decomposition as well as dehydration took place in the reaction of methanol over Rh/Al2O3 catalyst. Pyridine adsorption during the reaction revealed that Rh was active sites for the decomposition, and Al2O3 was those for the dehydration.When base metals were added to Rh/Al2O3, the selectivity for the decomposition increased with lowering electronegativity of metal ions added. Thus, alkali metals such as potassium (K) gave the highest selectivity for the decomposition. Further addition of some base metals to Rh-K/Al2O3 selectively promoted the decomposition of methanol.
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