If Damkohler number, NDa >>1, the reaction rate is much greater than the mass transfer rate and the overall reaction is controlled by the rate of mass transfer. In this case, the enzyme reaction can be described as (where Csb and Cs are the substrate concentration in bulk of solution and at the immobilized enzyme surface respectively. ks mass transfer coefficient, and a is the surface area of an immobilized enzyme particles)
Options
A. rp = ksa(Csb-Cs)
B. rp = ksaCsb
C. rp = ksaCs
D. rp = ksa(Csb+Cs)
Correct Answer
rp = ksaCsb
Immobilized Enzyme problems
Search Results
1. Damkohler number(NDa) is
Options
A. the ratio of the maximum reaction rate to the maximum mass transfer rate
B. the ratio of the minimum reaction rate to the maximum mass transfer rate
C. the ratio of the maximum reaction rate to the minimum mass transfer rate
D. the ratio of the minimum reaction rate to the minimum mass transfer rate
10. To measure the extent to which the reaction rate is lowered because of resistance to mass transfer, the effectiveness factor of an immobilized enzyme, ? can be defined as
Options
A. reaction rate/rate if not slowed by diffusion
B. rate if not slowed by diffusion/ reaction rate
C. actual reaction rate/ rate if not slowed by diffusion
D. rate if not slowed by diffusion/ actual reaction rate