Sentence examples for deactivation sites from inspiring English sources

Moreover, because the NaYbF4 Tm3+ nanoparticles contain a large amount of Yb3+ ions in the lattice, Yb3+-mediated energy transfers of excited energy to surface lanthanide ions or surface deactivation sites will be extremely high.

Most Ziegler Natta catalysts deactivate to form deactivation site (Cd) and/or dead chain (De i ).

Using this model, simultaneous deactivation by site coverage and pore plugging can be simulated.

The case of catalyst deactivation by site coverage and pore plugging is considered in detail.

The kinetic reaction constant for fresh catalyst ko, the catalyst site deactivation constant kd, the sites deactivation reaction order m and the deactivation reaction order n′ with respect to cyclohexanone oxime were determined.

The dissolution of CaO into alcoholic phase also causes the deactivation of active sites, and thus, it leads concentration of CaO decrease.

Slow diffusion of the generated intermediates from the catalyst surface can be resulted in the deactivation of active sites on the photocatalyst.

The difference observed in the initial rate and the steady rate over SZ was due to rapid deactivation of sulfate sites, which may be avoided by a balancing of the extent of reaction taking place over supported material by reaction over both types of active site and potentially by a hydrogenation of coke formed by hydrogen supplied by the active carbide phase.

Selective deactivation of acid sites at the outer surface of the zeolite membrane (feed side of reactant) by the CCS method allowed us to increase the selectivity of the olefins by 10% as compared to the untreated membrane.

The ethylene polymerization in the presence of the catalytic system on different alumina supports was investigated on the basis of a proposed kinetic model, taking into consideration the deactivation of active sites in the process.

The authors have previously shown (du Toit and Nicol, 2003) that the rate inhibition effect of water on cationic exchange resin catalysts can be modelled by using a Freundlich water adsorption isotherm to account for the reversible deactivation of active sites.