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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