Preferred Label : fouling agent;
Detailed label : fouling agent in catalysis;
IUPAC definition : Fouling agents (or mechanical inhibitors) are inhibitory substances bound by neither
covalent nor other strong bonds to the active centres: the interaction is usually
of the van der Waals, H-bond or sometimes ionic, type. They form protective layers
or block pores, thus physically impeding access of reactants to the active centres.
The fouling agents which cause real problems are those which have a long standing
effect and do not disappear spontaneously. Carbon deposits act, partially or totally,
this way (see coking ). Other examples are vanadium and nickel sulfide deposits in
hydrotreating catalysts.;
Origin ID : F02491;
See also
Fouling agents (or mechanical inhibitors) are inhibitory substances bound by neither
covalent nor other strong bonds to the active centres: the interaction is usually
of the van der Waals, H-bond or sometimes ionic, type. They form protective layers
or block pores, thus physically impeding access of reactants to the active centres.
The fouling agents which cause real problems are those which have a long standing
effect and do not disappear spontaneously. Carbon deposits act, partially or totally,
this way (see coking ). Other examples are vanadium and nickel sulfide deposits in
hydrotreating catalysts.
