The invention relates to a hydrogenation reaction catalyst, the chemical formula is CuOx-ROy/SiO, therein, R is selected from one or more than one alkaline earth metal elements, transition-metal elements or rare-metal elements, x is 1/2 of the valence number of Cu, y is 1/2 of the ...
achieve asymmetric synthesis hydrogenation. In the latter case, alkanes are formed from double or triple bond carbon moieties. In all cases the choice of the catalyst greatly influences a hydrogenation reaction, as well as the catalyst concentration, solvent, substrate purity, temperature, ...
et al. Nanometre-scale spectroscopic visualization of catalytic sites during a hydrogenation reaction on a Pd/Au bimetallic catalyst. Nat Catal 3, 834–842 (2020). https://doi.org/10.1038/s41929-020-00511-y Download citation Received21 January 2020 Accepted06 August 2020 Published21 September ...
A hydrogenation catalyst is used in an ethylene plant to remove impurities or contaminants from the process streams. Hydrogenation is any process or reaction in which hydrogen is added to unsaturated hydrocarbon molecules, known as olefins. Ethylene is a common olefin and crucial build...
(Entry 1). For the CoOx/TiO2reference catalyst, only trace conversion (0.9%) is detected under the same reaction conditions (Entry 2). For the CoOxPt/TiO2catalysts with closely contacted Pt and CoOx, the selectivity to CALC is remarkably improved after addition of CoOx(Entry 3). Moreover,...
We have investigated the mechanism of selective hydrogenation of 1,3-butadiene on Pd1-O/graphene by combining detailed catalyst characterization, kinetic studies, H-D exchange, and DFT calculations. In situ XAFS and STEM showed that the Pd1 single atoms were stable in the reducing environment at ...
Photothermal conversion allows the reaction to utilise solar energy to induce activity. The key advantage of this route is the localised temperature increase of the catalyst, as opposed to the extensive heating required for thermal conversion, which provides an ultimately more sustainable process [10]...
A pretreatment involving a 4-h reduction under H 2 at 573 K, compared to either 473 or 673 K, gave the highest specific activity for furfural and crotonaldehyde hydrogenation over an unpromoted copper chromite catalyst. Both H 2 and CO chemisorption declined monotonically with increasing reduction...
can be avoided by following calcination treatment with reduction (both at 450 °C), allowing us to prepare an exceptionally active catalyst. Detailed characterization has revealed that the peripheral sites at the Pt/TiO2interface are the most likely active sites for this hydrogenation reaction. ...
The flavouring, perfume and pharmaceutical industries rely on the selective hydrogenation of α,β-unsaturated aldehydes to generate unsaturated alcohols; here, a new type of highly selective catalyst is described in which platinum nanoparticles are sand