Abstract
Decomposition of isopropanol over inorganic pigments was measured by a microcatalytic reactor. The decomposed products of isopropanol suggested that pigments were able to be classified into the following four groups.
Group 1. The type of pigments which mainly produces propylene.
Group 2. What mainly produces acetone.
Group 3. What forms both acetone and propylene.
Group 4. What does not decompose isopropanol.
Through our present study on the decomposition mechanism of isopropanol, it was found that propylene was formed mainly at acidic sites, and acetone was formed mainly at basic sites on the pigments. Further investigation was made on the effect of alkali treatment of kaolinite which have acidic sites, and the dehydration of isopropanol over treated kaolinite was analyzed by Arrhenius equation. The results showed that the apparent activation energy became larger and the reaction proceeded unsatisfactorily, at the amount of sodium carbonate increased.
