High Temperature Calorimetry of MCM-41

Ivan Petrovic, Alexandra Navrotsky, Cong Yan Chen, Mark E. Davis

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Thermochemical stability of pure-silica MCM-41 molecular sieves(pore size 2.5-5 nm) was studied by high temperature solution and transposed temperature drop calorimetry at 977 K. Though the pore size varies by approximately 2 nm(almost a factor of 2), there are minimal differences in enthaply among these structures both at 977 and 298 K. At 298 K they are destabilized by less than 15 kJ/mol relative to quartz, which implies an energy only about 1 kJ/mol higher than siliceous zeolite Y, whose pore size is 0.74 nm. Results are compared with those for other microporous silicas and implications for structure/stability relations are discussed.

Original languageEnglish (US)
Pages (from-to)677-684
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume84
Issue numberC
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

ASJC Scopus subject areas

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

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