‘If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process’. The diffusivity under this condition is called ‘Knudsen diffusivity’, which is affected by the_____________________?

Related Mcqs:

B.E.T. method can be used to determine the ___________________ of a porous catalyst?

A. Solid density B. Pore volume C. Surface area D. All A., B. and C....

The use of space time is preferred over the mean residence time in the design of a/an____________________?

A. Batch reactor B. Ideal tubular-flow reactor C. Slurry reactor D. CSTR...

The first order gas phase reaction as shown in the bellow figure is conducted isothermally in batch mode. The rate of change of conversion with time is given by________________?

A. dXA/dt = k1 (1 – XA)2 (1 + 2XA) B. dXA/dt = k1 (1 – XA) (1 + 0.5XA) C. dXA/dt = k1 (1 – XA) D. dXA/dt = k1 (1 – XA)/(1 + XA)...

The space time is equivalent to the holding time in a steady state mixed reactor for_____________________?

A. Non-isothermal gas reaction B. Variable fluid density systems C. Constant fluid density systems D. Gas reactions with changing number of moles...

For the reaction, A + B → 2B + C,___________________?

A. rA = rB B. rA = -rB C. rA = 2rB D. rA = rB/2...