Kinetics, poisoning and mass transfer effects in liquid-phase hydrogenations of phenolic compounds over a palladium catalyst
✍ Scribed by J.J. Zwicky; G. Gut
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 594 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0009-2509
No coin nor oath required. For personal study only.
✦ Synopsis
Abstrac
-The itiuence of polsonmg and mass transport on the performance of a suspended palladmm catalyst for the hquid-phase hydrogenatton of o-cresol has been mvestlgated Rate expressIons were defined for the various transport and reaction steps occunng m the three-phase slurry system and these were combmed into an overall rate expressnon From tlus, the various possible rate-hnutmg steps were analysed either by an expenmenti approach or by-calculation The hydrogenation m the absence of poison IS described by a Langmmr-Hmshetwood adsorptlon model with adsorotion of hvdroeen and substrate on ddTerent actwe sites of the catalyst When poison IS present m the feed, the a&wty loss c& be described by an extended model of the same type, experunental results show that the potson IS very strongly adsorbed and that there IS practically no mterachon between poison and substrate on the remammg catalyst surface The selectlvlty IS not affected by mcreasmg poison concentration lNTRomlcTIoN