TY - JOUR
T1 - Characterization of the acidic and basic properties of αLiAIO2, γLiAIO2, and calcined "HAIO2" using isopropyl alcohol
AU - Tomczak, D. C.
AU - Allen, J. L.
AU - Poeppelmeier, K. R.
N1 - Funding Information:
The authors gratefully acknowledge support from the Department of Energy, Contract DE-F605-86ER75295, for the surface area and porosity measurement equipment, and from the National Science Foundation, Solid State Chemistry. Contract DMR-8915897, for support on compound precursors to mixed metal oxides. We also express thanks to Professor Herman Pines, Professor Robert Burwell, Dr. Werner Haag, and Professor Martin Johnson for their invaluable comments regarding the development of the reaction pathways.
PY - 1994/3
Y1 - 1994/3
N2 - Characterization of both the acidic and basic sites of αLiAIO2, γLiAIO2, and calcined "HAIO2" was carried out with the isopropyl alcohol probe reaction. All three materials catalyzed the formation of both propylene and acetone. The formation of propylene is indicative of acidic-basic pair sites, while the presence of acetone is indicative of basic sites. In addition to the formation of both propylene and acetone, base-catalyzed acetone aldol condensation products were formed on both αLiAIO2 and calcined "HAIO2." Both materials produced a C6DIENE (2-methyl-1,3-pentadiene or 4-methyl-1,3-pentadiene) aldol condensation product, while αLiAIO2 also produced the aldol condensation products 4M2PONE (4-methyl-2-pentanone) and 4M2POL (4-methyl-2-pentanol). The reaction pathways that describe the formation of the various C6 products were used to infer the nature of the basic sites on the materials. Additional information obtained from TPD and FTIR of chemisorbed CO2 demonstrate that the basic sites on αLiAIO2 are similar in strength and number to MgO.
AB - Characterization of both the acidic and basic sites of αLiAIO2, γLiAIO2, and calcined "HAIO2" was carried out with the isopropyl alcohol probe reaction. All three materials catalyzed the formation of both propylene and acetone. The formation of propylene is indicative of acidic-basic pair sites, while the presence of acetone is indicative of basic sites. In addition to the formation of both propylene and acetone, base-catalyzed acetone aldol condensation products were formed on both αLiAIO2 and calcined "HAIO2." Both materials produced a C6DIENE (2-methyl-1,3-pentadiene or 4-methyl-1,3-pentadiene) aldol condensation product, while αLiAIO2 also produced the aldol condensation products 4M2PONE (4-methyl-2-pentanone) and 4M2POL (4-methyl-2-pentanol). The reaction pathways that describe the formation of the various C6 products were used to infer the nature of the basic sites on the materials. Additional information obtained from TPD and FTIR of chemisorbed CO2 demonstrate that the basic sites on αLiAIO2 are similar in strength and number to MgO.
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U2 - 10.1016/0021-9517(94)90018-3
DO - 10.1016/0021-9517(94)90018-3
M3 - Article
AN - SCOPUS:0000463184
VL - 146
SP - 155
EP - 165
JO - Journal of Catalysis
JF - Journal of Catalysis
SN - 0021-9517
IS - 1
ER -