ime: 3 hrs 38. What is the method used for production unsupported catalysts by h

Question

ime: 3 hrs 38. What is the method used for production unsupported catalysts by hydrolysis and partial condensation of an inorganic salt or a metal alkoxide? (a) Mechanical treatment (b) Precipitation and coprecipitation (c) The sol - gel process (d) Hydrothermal synthesis 39. The catalyst gas adsorption based on the dependence of the pre radius of a pore in which condensation takes place in the range of (a) mesopores (b) micropore (c) micro- and mesopores (d) macropores 40. It is true that the larger catalyst particles are the better to use in the reactor bed if..i not a ssure of capillary condensation on the problem. conversion (b) selectivity (c) diffusion (d) voidage

Explanation / Answer

38) It is The sol -gel process:-

Process of hydrolysis and partial condensation of salt or metal alkoxide forms a sol

39)Mesopores

Capillary condensationis a phenomenon whereby a gas condenses to a liquid-like phase in a pore at a pressure p less than saturation pressure p0 of the bulk liquid

40)Diffusion. Smaller catalyst is recommended for avoiding negative impact due to diffusion

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