heterogeneous catalysis

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heterogeneous catalysis

[‚hed·ə·rə′jē·nē·əs kə′tal·ə·səs]
(chemistry)
A chemical process in which the catalyst is in a separate phase, usually the reactants and products are in gaseous or liquid phases and the catalyst is a solid, and the catalytic reaction occurs on the surface of the solid.
References in periodicals archive ?
The catalytic activity of the synthesized catalyst 4 as a heterogeneous catalyst was investigated in one-pot synthesis of 1,8dioxo-octahydroxanthenes through the reaction between aromatic aldehydes and dimedone (Scheme 2).
We have shown for the first time that a heterogeneous catalyst, namely commercially available AlPO4-5 and SBA-15 molecular sieve, can be successfully and efficiently utilized for the highly selective synthesis of 3.
Niobium oxides and their derivatives have been described as a compatible heterogeneous catalyst for various organic reactions [21-23].
They experimented with two types of compounds: sodium carbonate (Na2Co3), a homogeneous catalyst, and a group of heterogeneous catalyst known as cerium-zirconium mixed oxides (CeZrOx).
Jiang, "Clean production of glucose from polysaccharides using a micellar heteropolyacid as a heterogeneous catalyst," Applied Catalysis B: Environmental, vol.
The heterogeneous catalyst is the great economic impact as the USY zeolite which provides high activity and selectivity of the catalysts.
Liu, "Iron oxide encapsulated by ruthenium hydroxyapatite as heterogeneous catalyst for the synthesis of 2,5-diformylfuran," ChemSusChem, vol.
Current analysis focuses on the use of ironcontaining waste as a heterogeneous catalyst in the reduction of industrial emissions of nitrous oxide.
Using the AuNPs/GQDs/Si[O.sub.2] composite as a heterogeneous catalyst and hydrogen peroxide as the oxidant, veratryl alcohol could be oxidized to veratraldehyde and veratric acid in a step-wise manner.
To the best of our knowledge, this is the first reported study towards the use of foundry sand and fly ash as a heterogeneous catalyst in photo-Fenton degradation of dyes.
Next, the heterogeneous catalyst such as metallic or metal oxide has wide potential to use it, where these catalysts can be easily recycled.

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