Title page for ETD etd-02062013-040135


Type of Document Master's Thesis
Author Hervas, Manuel A.
URN etd-02062013-040135
Title Heats of immersion of zeolites in n-alcohols
Degree Master of Science
Department Chemistry
Advisory Committee
Advisor Name Title
Wightman, James P. Committee Chair
Dillard, John G. Committee Member
Hanson, Brian E. Committee Member
Keywords
  • Thermal analysis
Date of Defense 1987-07-15
Availability restricted
Abstract

The heats of immersion in n-alcohols of zeolites NaY, 5A and ZSM-5 and the kinetics of the immersion process have been determined using a Calvet MS-70 microcalorimeter. The specific heat of immersion decreased non-linearly as a function of chain length of alcohol for NaY and 5A. In contrast, the specific heat of immersion passed through a maximum at n-pentanol for ZSM-S. The specific immersion time as a function of chain length of alcohol showed an apparent linear increase in the order 5A > ZSM-S > NaY. NaY showed almost no increase. The effects of sample evacuation temperature and butyl alcohol isomer bulk on the heats of immersion were also investigated. These results were interpreted in terms of molecular accessibility of the wetting liquid into the pores of the zeolites and in terms of the Si/Al ratio of the zeolites. The overall kinetics of immersion appears to be first order.

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