Study of phosphorus-modified aluminum pillared montmorillonite. I. Effect of the nature of phosphorus compounds

THUIR > College of Science > Department of Chemistry > Periodical Articles > Item 310901/22458

Please use this identifier to cite or link to this item: http://140.128.103.80:8080/handle/310901/22458

Title:	Study of phosphorus-modified aluminum pillared montmorillonite. I. Effect of the nature of phosphorus compounds
Authors:	Shen, Y.-F., Ko, A.-N., Grange, P.
Contributors:	Department of Chemistry, Tunghai University
Keywords:	acidity;butanol dehydration;butenes;catalyst characterization (acidity);montmorillonite;phosphorus;pillared clays
Date:	1990
Issue Date:	2013-05-21T09:07:03Z (UTC)
Abstract:	Phosphorus and phosphoric acids induce effects on the physiochemical and catalytic properties of Al-pillared montmorillonite. H 3PO 3 results in a slight increase in the thermal stability and a significant enhancement of total acidity defined as an improvement of Br?nsted acidity and a loss of Lewis acidity. H 3PO 3 causes a strong reduction in the thermal stability, BET area and both Lewis and Br?nsted acid sites. This substantial difference is attributed to different pH and different ease of AlPO 4 formation: low pH and AlPO 4 formation produce deleterious effects. Two different structural models and new acid site formation are proposed. Conversion in the 1-butanol dehydration reaction shows that the conversion is correlated with Lewis acidity. The medium and strong acid sites created explain the ratios of 1-butene (1B) to dibutyl ether (DBE) and of 2-butenes to (1B+DBE). ? 1990.
Relation:	Applied Catalysis 67 (1) , pp. 93-106
Appears in Collections:	[Department of Chemistry ] Periodical Articles

Files in This Item:

File	Size	Format
index.html	0Kb	HTML	156	View/Open