Effect of Al sources on the synthesis and acidic characteristics of mesoporous aluminosilicates of MCM-41 type

Kondam Madhusudan Reddy, Chunshan Song

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Abstract

This paper reports the synthesis of four series of mesoporous aluminosilicates (Al-MCM-41) and their acidic characteristics. Four different Al compounds were examined as Al source in the hydrothermal synthesis of Al-MCM-41, including pseudo boehmite, aluminum sulfate, aluminum isopropoxide, and sodium aluminate. Synthesized samples were characterized by XRD, chemical analysis, nitrogen adsorption, and 27Al MAS NMR. The acidic characteristics of the Al-MCM-41 samples were characterized using temperature-programmed desorption of n-butylamine, and probe hydrocracking reactions of 1,3,5-triisopropylbenzene and 1,3,5-tri-t-butylbenzene. The results clearly indicate that the Al source used for synthesizing Al-MCM-41 samples has a major impact on the Al incorporation in their framework and their acidic properties. Al-MCM-41 prepared with Al isopropoxide and sodium aluminate showed improved acidic properties than those with pseudo boehmite and Al sulfate.

Original languageEnglish (US)
Pages (from-to)291-299
Number of pages9
JournalStudies in Surface Science and Catalysis
Volume117
StatePublished - Jan 1 1998

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All Science Journal Classification (ASJC) codes

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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