Intercalation study and catalysis by lanthanum niobium oxides

• Published in: Catalysis today Vol. 16; no. 3; pp. 455 - 462
• Main Authors: Matsuda, Tsuneo, Fujita, Tetsuya, Miyamae, Naosuke
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 03.05.1993; Elsevier Science
• Subjects: Catalysis; Catalysts: preparations and properties; Chemistry; Exact sciences and technology; General and physical chemistry; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Intercalation compound; Transition metal Oxides; Catalytic reaction; Lamellar compound; Perovskite type compound; Aliphatic compound; Saturated compound; Secondary alcohol; Dehydration; Lanthanum Niobium Oxides Mixed; Lanthanide Oxides; Primary alcohol
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/0920-5861(93)80085-F

For the study of the acidic character of layered perovskite oxide, HLaNb 2O 7 (HLa), the intercalation of water and alcohols was performed and further the HLa was used of dehydration of 1- and 2-butanol as a test reaction. The acidic properties of the HLa was greatly affected by the irreversible water in the interlayer removed in the temperature range of 350°C4̃00°C. In the presence of water, the intercalation of hydrophilic nalcohols having carbon number below 5 occurred. Dehydration activity of 2-butanol was higher than 1-butanol and produced only n-butenes. On the other hand, butenes and n-butylaldehyde were produced in the reaction of 1-butanol, especially the formation of the latter was predominant at the lower temperature as 200°C2̃50°C. With raising the heat-treatment temperature of the catalyst its acidity decreased and was almost lost at 500°C. However, the selectivity to n-butylaldehyde increased, indicating that the acidity did not concern to the nbutylaldehyde formation. The reaction behaviors of 1-and 2-butanol on the HLa catalyst were discussed.