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By Paul Nels Rylander

"Contains the court cases of the ... convention on Catalysis in natural Syntheses.".

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R - rate o f chemical r e a c t i o n ( g m . m o l e s / s e c . ) Vc - volume o f c a t a l y s t ( c m . ) 47 9 G E O R G E W. 3) tortuosity (dimensionless) modulus ( d i m e n s i o n l e s s ) Subscripts: A - denotes Β - denotes g - refers gl - refers 1 - refers Is - refers s - refers species A Species Β to gas to g a s / l i q u i d i n t e r f a c e to l i q u i d to l i q u i d / s o l i d i n t e r f a c e to s o l i d S1u p e r s c r i p t s : - denotes s p e c i e s Β ^ - denotes a c a l c u l a t e d value REFERENCES 1.

An example o f the u s e o f F i g u r e 14 t o e s t i m a t e the i m p o r ­ tance o f pore d i f f u s i o n i s g i v e n i n Appendix B. 42 1 l £ I I I UOlOVd SS3N3All03dd3 I 1 I 1 1 I ο 6 43 L ~L ° ο ό GEORGE W. ROBERTS CONCLUSION T h i s paper i s an a t t e m p t t o c o n d e n s e the v e r y complex s u b ­ j e c t o f c h e m i c a l r e a c t i o n - t r a n s p o r t phenomena i n t e r a c t i o n s i n t o an e l e m e n t a r y form t h a t can be e a s i l y u t i l i z e d by the c a t a l y t i c chemist.

7 0 χ 1 0 " 3 gm. moles o f n i t r o b e n z e n e p e r m i n u t e , o r 2 . 1 0 χ 1 0 - 3 g m. moles o f f ^ / m i n . The amount o f c a t a l y s t used was 0 . 0 6 1 5 g r a m s , w i t h an a v e r ­ age p a r t i c l e s i z e o f 1 6 u . The p a r t i c l e d e n s i t y ( i n a i r ) (p ) was a b o u t 0 . 9 5 g m . / c m . ^ and the p o r o s i t y o r f r a c t i o n a l p o r i volume (Θ) was a b o u t 0 . 5 0 . S i n c e t h e d e n s i t y o f e t h a n o l (p-j ) a t r e a c t i o n c o n d i t i o n s i s a b o u t 0 .

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