Chemical Engineering > GATE 2023 > Catalysis
CO and H2 participate in a catalytic reaction. The partial pressures (in atm) of the reacting species CO and H2 in the feed stream are pCO and pH₂, respectively. While CO undergoes molecular adsorption, H2 adsorbs via dissociative adsorption, that is, as hydrogen atoms. The equilibrium constants (in atm−1) corresponding to adsorption of CO and H2 to the catalyst sites are KCO and KH₂, respectively. Total molar concentration of active sites per unit mass of the catalyst is Ct (in mol·(g cat)−1). Both the adsorption steps are at equilibrium. Which one of the following expressions is the CORRECT ratio of the concentration of catalyst sites occupied by CO to that by hydrogen atoms?
A
KCOpCO / √(KH2pH2)
B
KCO / √KH2
C
pCO/√pH2
D
(KCOpCO) / (KH2pH2)

Correct : d

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