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( 5 0 p . ) A proposed mechanism for the water - gas shift reaction on ferrochrome catalysts at high T is: H 2
p A proposed mechanism for the watergas shift reaction on ferrochrome catalysts at
high is:
Sha
HharrO
Sharr OCO
OCO
where is a surface site and and OCOS are surface bound species
each molecule of a surface bound species is chemisorbed onto a single surface site
a What are the units of each one of the ten rate constants? p
b Derive an expression for the rate of the overall reaction
in terms of the gas phase concentrations, assuming that reaction is the rate
limiting step. p
c Derive an expression for the rate of the overall reaction assuming that
desorption is the rate limiting step. p
d Derive an expression for the rate of the overall reaction assuming that
adsorption is the rate limiting step. p
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