Reaction Kinetics and Catalysis Letters

, Volume 13, Issue 2, pp 143–149 | Cite as

Solvent effects on reaction rates in a catalytic slurry reactor

  • K. C. Pratt
  • Chu Sai Ming
Article
  • 40 Downloads

Abstract

By carrying out static adsorption measurements, it is shown that absolute values of adsorption strength parameters required in an earlier Langmuir type model for liquid phase catalytic hydrogenation in the presence of an adsorbing solvent can be obtained. These can be used to predict the relationship between reaction rate and reactant concentration in the solvent.

Keywords

Hydrogenation Physical Chemistry Catalysis Liquid Phase Solvent Effect 

Symobols

Symobols

a

relative adsorption strength (1/mol)

C

molar concentration (mol/1)

Δ G

free energy of adsorption (kJ/kg mol)

k

reaction rate constant (mmol/min g-Ni)

K

separation factor, equation (5)

m

weight of catalyst

M

molecular weight

n

number of mols of solution

r

rate of surface reaction (mmol/min g-Ni)

R

universal gas constant (kJ/kg mol K)

Δ S

change of thermal part of entropy on adsorption (kJ/kg mol K)

T

temperature (K)

Δ U

free energy change on adsorption (kJ/kg mol K)

x

mole fraction (kJ/kg mol K)

з

density (g/ml)

Subscripts

c

reactant

s

solvent

1.2

components 1 and 2

Superscripts

l

liquid phase

o

pure component

с

adsorbed phase

Abstract

На основе измерений стаическоЙ адсорбии показано, что абсолютные значения параметров для силы адсорбции, требуемые для ранней модели типа Лангмюра, могут быть определены в присутствии адсорбирующегося растворителя. Эти значения могут быть использовны Qj для предсказания связи между скоростью реакции и концентрацией реагента в данном растворителе.

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References

  1. 1.
    S. Kishida, S. Teranishi: J. Catal.12, 90 (1968).Google Scholar
  2. 2.
    D. H. Everett: Trans. Farad. Soc.60, 1803 (1964).Google Scholar
  3. 3.
    D. H. Everett: Trans. Farad Soc.46, 942 (1950).Google Scholar
  4. 4.
    P. N. Rylander, N. Himelstein, M. Kilroy: Engelhard Ind. Tech. Bull.,4, 49 (1963).Google Scholar
  5. 5.
    P. N. Rylander, N. Himelstein: Engelhard Ind. Tech. Bull.,2, 131 (1964).Google Scholar

Copyright information

© Akadémiai Kiadó 1980

Authors and Affiliations

  • K. C. Pratt
    • 1
  • Chu Sai Ming
    • 1
  1. 1.Department of Chemical Engineering and Chemical TechnologyImperial CollegeLondon

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