Structured multiphase reactors based on fibrous catalysts: nitrite hydrogenation as a case study

A reactor concept designed as a bubble column staged with fibrous catalytic layers is tested on pilot-scale for the redn. of nitrite to N by H. CO2 is used to neutralize the hydroxide ions produced during hydrogenation of nitrite. The effective reaction rate was found to depend on the superficial gas velocity ug0. The fibrous catalysts demonstrated a high selectivity towards nitrogen. The influence of the mass transport on the effective kinetics is discussed and the volumetric liq.-solid mass transfer coeff. kSaS is estd. as a function of the superficial gas velocity ug0. The selectivity was found to be independent of the hydrodynamics.


Published in:
Catalysis Today, 69, 1-4, 175-181
Year:
2001
Publisher:
Elsevier
ISSN:
0920-5861
Keywords:
Note:
CAN 136:74105; 61-5; Water; Swiss Federal Institute of Technology, LGRC-EPFL,Lausanne,Switz.; 0920-5861; written in English; 7440-05-3 (Palladium) Role: CAT (Catalyst use), USES (Uses) (structured multiphase reactors based on fibrous catalysts and nitrite removal by hydrogenation); 14798-03-9 (Ammonium) Role: FMU (Formation, unclassified), POL (Pollutant), FORM (Formation, nonpreparative), OCCU (Occurrence) (structured multiphase reactors based on fibrous catalysts and nitrite removal by hydrogenation); 124-38-9 (Carbon dioxide); 1333-74-0 (Hydrogen) Role: NUU (Other use, unclassified), USES (Uses) (structured multiphase reactors based on fibrous catalysts and nitrite removal by hydrogenation)
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 Record created 2006-04-18, last modified 2018-03-17

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