Catalyst Phase

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Catalyst Phase

Postby Ashley_Lok_3M » Wed Mar 01, 2017 11:24 pm

What effect does the phase of a catalyst have on the ability of a reaction to take place?

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Re: Catalyst Phase

Postby arsalzaheer2L » Thu Mar 02, 2017 12:14 am

I was wondering this as well!

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Re: Catalyst Phase

Postby Aishwarya_Natarajan_2F » Thu Mar 02, 2017 12:32 am

Homogeneous catalysts are in the same phase as the reactants while heterogeneous catalysts are not. As far as I understand, the phase matters in terms of effectivity depending on the phase that the reactants are in. For example, a solid catalyst in an aqueous solution or a liquid catalyst in an aqueous solution, versus a case where the reactants sit on the surface of the catalyst, which would be called adsorption.

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Re: Catalyst Phase

Postby Chem_Mod » Thu Mar 02, 2017 10:50 am

Explaining further, a solid catalyst for a gas-phase or aqueous reaction requires the reactants to adsorb to the surface for the reaction to take place, so the rate of reaction could be limited by the surface area of the catalyst in contact with the gas/aqueous phase.

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