Abstract: Aerogels are materials obtained by a sol-gel process followed by supercritical drying with high surface areas and pore volumes. We studied how the gel modification with acids and E-diketones affects the textural and adsorption properties of alumina aerogels. The highest specific surface areas obtained for alumina aerogels exceeding 1000 m2/g are 4-5 times higher than those of typical alumina materials. Sulfated alumina aerogels had high surface areas ca. 600 m2/g after calcination at 600°C and excellent acidic properties. The activity of high surface area nanocrystalline alumina in dehydrochlorination of (2-chloroethyl)ethyl sulfide (2-CEES) and 1-chlorobutane compared favorably with that of other nanocrystalline metal oxides. The temperature of 1-chlorobutane decomposition could be decreased by 100°C in comparison with MgO aerogel while maintaining 98% selectivity to butenes. Conversion of 2-CEES in pentane at room temperature over sulfated aerogel alumina was 3 times higher than on Al2O3 aerogel and 8 times higher than on MgO aerogel. It was shown that the activity of the aerogels in dehydrochlorination reactions correlated with the concentration of weak electron-acceptor sites tested by EPR using perylene as a spin probe.

Cite: Bedilo A.F. , Shuvarakova E.I.
Synthesis of Mesoporous Alumina and Sulfated Alumina Aerogels and Their Application in Dehydrochlorination Reactions
In compilation International Porous and Powder Materials Symposium and Exhibition PPM 2015 : Proceedings. – Uc Adim Printing House., 2015. – C.106-110. – ISBN 9789756590072.

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