In this study, we investigated the rate of ZSM-5 framework decrystallization in HLW at temperatures ranging from 150 C to 350 C and times ranging from 6 hours to 1000 hours. Tracking ZSM-5 crystallinity over time using XRD indicates that decrystallization in HLW obeys a pseudo-first order rate law. Temperature analysis of the pseudo-first order rate constant indicates that ZSM-5 decrystallization in HLW follows a non- Arrhenius behavior due to the dissociation of zeolite acid sites in water. Supporting data from IR and gas sorption indicates that the decrystallization mechanism of ZSM-5 in HLW is dealumination. The decrystallization of ZSM-5 in HLW appears to take place due to thermal and ionic effects.

• This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.

Creator

• Abu Muti, Ibrahim M.
• Almaymuni, Abdullah M.
• Davis, Nyoca N.
• Kesisoglou, Iordanis

Publisher

• Worcester Polytechnic Institute

Identifier

• E-project-042516-113225

Advisor

• Timko, Michael T.
• Deskins, N Aaron

Year

• 2016

Date created

• 2016-04-25

Resource type

• Major Qualifying Project

Major

• Chemical Engineering

Rights statement

• In Copyright