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Chemical Reaction Engineering—Plenary Lectures by James Wei and Christos Georgakis (Eds.)

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present difficulties in polymerization response engineering / W. Harmon Ray --
blending in chemical reactors / Jacques Villermaux.

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W. C. 20036 from C H E M I C A L REACTION 48 Literature Cited 1. Meisel, S. , McCullough, J. , Lechthaler, C. , and Weisz, P. , CHEMTECH, 1976, 6, 86-9. 2. Kokotailo, G. , Lawton, S. , Olson, D. , and Meier, W. , Nature, 1978, 272, 437-8. 3. Chang, C. , and Silvestri, A. , J. , 1977, 47, 249-59. 4. Fitch, F. , 1981. 5. Garwood, W. , "Conversion of C -C Olefins to Higher Olefins Over Synthetic Zeolite ZSM-5," presented at Am. Chem. Soc. , Las Vegas, Nevada, March, 1982. 6. Meisel, S. L. and Weisz, P.

5 m/sec. E x c e l l e n t s t a b i l i t y of the o p e r a t i o n was demonstrated over a 75-day run. Higher g a s o l i n e y i e l d and octane number than f o r fixed-bed processing were v e r i f i e d (Table I I ) . A t y p i c a l temperature p r o f i l e i n the r e a c t o r i s shown i n Figure 12. Despite the h i g h l y exothermic nature of the r e a c t i o n and the unusually high l e n g t h - t o diameter r a t i o (greater than 75) of the r e a c t o r , a very uniform temperature p r o f i l e was e s t a b l i s h e d .

At any i n s t a n t only t h i s proport i o n of the t o t a l cloud i s r e a c t i n g so that the e f f e c t i v e r a t e constant i s reduced. The whole i s c i r c u l a t i n g as a v o r t e x w i t h 3. ch003 increasing gas flow Ο Ο Ο ο ο ο ^ ο ο » * ° Ο <=> ο ° ο| tut Ο Figure 2. Bubbles s i z e increases w i t h bed height and flow r a t e . Figure 3. A bubble i n a l a r g e bed becomes a s l u g i n a s m a l l one. ch003 phase Figure h. ENGINEERING bubble phase B a s i c two-phase bubble model.

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