Type of Document Dissertation Author Fathi-Kalajahi, Jamshid URN etd-06142012-040025 Title Break-in behavior of a tungsten oxide on silica catalyst during propylene disproportionation. Degree PhD Department Chemical Engineering Advisory Committee
Advisor Name Title Wills, George B. Committee Chair Beyer, Gerhard H. Committee Member Michelsen, Donald L. Committee Member Rony, Peter R. Committee Member Ward, Thomas C. Committee Member Keywords
- catalyst properties
Date of Defense 1978-04-05 Availability restricted Abstract
This investigation consisted of a study of the break-in behavior of a tungsten oxide on silica catalyst during propylene disproportionation. A catalyst of 10 percent WO3 on silica gel (223 square meters per gram B.E.T. surface area) was used in a microcatalytic reactor. During the initial contacting of freshly activated samples of this catalyst with propylene, significant increases in disproportionation activity were observed for periods of up to 20 hours. The object of this study was to investigate the phenomena responsible for this break-in.
The rate of approach to steady-state activity data were obtained using catalyst samples which were first saturated with each of the three gases involved in this reaction (propylene, ethylene, and 2-butene) by pulsing at .94 and 2.7 atmospheres before.starting the propylene flow. Effects of each gas on the break-in behavior of the catalyst were determined. A material balance around the reactor was made for each gas by pulse reactor techniques.
Filename Size Approximate Download Time (Hours:Minutes:Seconds)
28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access LD5655.V856_1978.F28.pdf 7.99 Mb 00:37:00 00:19:02 00:16:39 00:08:19 00:00:42next to an author's name indicates that all files or directories associated with their ETD are accessible from the Virginia Tech campus network only.
If you have questions or technical problems, please Contact DLA.