The phenomenon of capillary condensation is studied through the weight change of condensed phase in an internally wetted porous pd catalyst pellet during the course of exothermic reacation of cyclohexane hydrogenation in a thermogravimetric analyzer (TGA). The direct measurement of condensed phase indicates that evaporation of condensed phase is confined to the macropores of catalyst pellet at ...

The paper deals with two approaches to the synthesis of a non-linear control system thermal regime liquid-phase chemical reactor at realization bimolecular exothermic reaction. Synthesis algorithms is carried out by method analytical design aggregated regulators (ADAR). first variant assumes temperature controller classic ADAR on basis sequential set invariant manifolds. second one based cascad...

Intramolecular activation processes of vulnerable ligand C-H bonds frequently limit the thermal stability and accessibility of late transition metal complexes with terminal metal nitrido units. In this study chloro substitution of the 2,6-ketimine N-aryl substituents (2,6-C(6)H(3)R(2), R = Cl) of the pyridine, diimine ligand is probed to increase the stability of square-planar iridium nitrido c...

We have studied the mechanism of the initial stages of nitrogen-doped single-walled carbon nanotube growth illustrated for the case of a floating catalyst chemical vapor deposition system, which uses carbon monoxide (CO) and ammonia (NH(3)) as precursors and iron as a catalyst. We performed first-principles electronic-structure calculations, fully incorporating the effects of spin polarization ...

Heat is evolved when solutions of trypsinogen or chymotrypsinogen A are mixed with solutions of the amide or methyl ester derivatives of NQ-p-toluenesulfonyl-L-arginine, appropriate corrections being made for heats of reactant dilution. Exothermic reaction was also observed when the two ligands were mixed with tr-chymotrypsin; all measurements were made at 25”, pH 5.0. The dependence of apparen...

The effects of aromatic stabilization on the rates of [1,5]-hydrogen shifts in a series of carbo- and heterocyclic dihydroaromatic compounds were estimated by B3LYP/6-31G computations. The aromatic stabilization energy of the product is directly translated into increased exothermicity of these reactions. Relative trends for a significant range of endothermic and exothermic [1,5]-shifts with dif...