Title page for ETD etd-10202005-102804

Type of Document Dissertation
Author Kim, Man-Hoe
URN etd-10202005-102804
Title Reaction of meta-diisopropylbenzene on acid molecular sieves and synthesis of zeolites by a vapor phase transport method
Degree PhD
Department Chemical Engineering
Advisory Committee
Advisor Name Title
Davis, Mark E. Committee Chair
Conger, WIlliam L. Committee Member
Cox, David F. Committee Member
Velander, William H. Committee Member
Wills, George B. Committee Member
  • Crystallization.
  • Zeolites.
  • Molecular sieves.
  • Isomerization.
  • Alkylation.
Date of Defense 1992-05-15
Availability restricted

Meta-diisopropylbenzene is reacted with propylene over the acid form of the molecular sieves SAPO-5, mordenite, offretite, beta, hexagonal and cubic faujasite (hex and FAU), L, SAPO-37, and an amorphous silica-alumina at temperatures around 463 K in a flow-type fixed-bed reactor. A small amount of cracking is observed. The main reactions of meta-diisopropylbenzene are isomerization and alkylation. This alkylation is proposed as a new test reaction to characterize the effective size of the voids in larger pore (12 T-atom rings or above) molecular sieves by measuring the amount ratio of formed 1,3,5- to 1,2,4-triisopropylbenzene. In most cases, this ratio increases with the increasing effective void size of the molecular sieves in the order: SAPO-5 < mordenite < offretite < beta < hex = FAU < L < SAPO-37 < amorphous silica-alumina. Since samples with the FAU topology show lower selectivities to 1,3,5-triisopropylbenzene than the mesoporous, amorphous silica-alumina, pore curvature has an influence on alkylation selectivity even for voids of 13 A size.

  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
[BTD] LD5655.V856_1992.K559.pdf 5.41 Mb 00:25:03 00:12:53 00:11:16 00:05:38 00:00:28
[BTD] next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.