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Journal of Porous Materials

, Volume 2, Issue 4, pp 263–271 | Cite as

Change of catalyst texture upon the partial filling of its voids with active components, coke, sulfur, etc.

  • V. B. Fenelonov
Article

Abstract

The changes in the main texture characteristics of catalysts, adsorbents, supports and other porous bodies are analyzed, upon the partial filling of their voids with the added components: coke, sulfur, active components of supported catalysts, etc. Equations are derived, that relate the changes of texture with the content and distribution of the introduced component.

Keywords

porous materials supported catalysts coking catalysts modifier distribution 

Nomenclature

A

specific surface area of mass unit

Av

specific surface area of volume unit

b

typical size of particles of modifier

f

free surface value of support

h

height of particle of modifier (cylindrical in shape)

K

shape factor of particles

M

modifier

N

number of particles of modifier

n

packing coordination number

R

radius of particle

S

surface of i type particles

t

average thickness of the film of modifier

U

degree of filling of support pores bulk

X

modifier content, g M/g MS

Y

modifier content g M/g S

V

volume

Greek

δ

apparent density

λ

morphology parameter

ψ

parameter of deposition of modifier

ɛ

porosity

ξ

A M o Y/A s

Subscripts

ex

external part (surface)

i

i-th type of particles

M

modifier

o

initial state of support

t

present state

S

support

MS

modified support

s

value relates to the surface

v

value relates to the volume

Superscripts

accessible surface of modifier

inaccessible surface of modifier

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • V. B. Fenelonov
    • 1
  1. 1.Boreskov Institute of CatalysisNovosibirskRussia

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