Kinetics and Catalysis 

About: Kinetics and Catalysis is an academic journal published by MAIK Nauka/Interperiodica. The journal publishes majorly in the area(s): Catalysis & Reaction rate constant. It has an ISSN identifier of 0023-1584. Over the lifetime, 3292 publications have been published receiving 23056 citations. The journal is also known as: Kinetika i kataliz.

Room-temperature ionic liquids : Neoteric solvents for clean catalysis

Abstract: The use of room-temperature chloroaluminate (III) ionic liquids, specifically 1-butylpyridinium chloride-aluminium (III) chloride and 1-ethyl-3-methylimidazoliurn chloride-aluminium (III) chloride, as solvents for catalytic processes, particularly those applicable to clean technology, is becoming widely recognized and accepted. The rationale for using these solvents is discussed here, and an indication of the scope of these solvents for future industrial processes is given.

New Mechanism for the Catalytic Oxidation of Lignin to Vanillin

Abstract: The previously proposed mechanism for lignin oxidation to vanillin was supported experimentally. This process begins with the formation of a phenoxyl radical and ends with the step of retroaldol cleavage of substituted coniferaldehyde to vanillin. The oxidation of model compounds was studied, and experimental evidence for the proposed mechanism was obtained. The postulated intermediate coniferyl alcohol was detected in the oxidation of eugenol. The proposed mechanism was supported by kinetic data and the composition of the oxidation products of vanillideneacetone, lignosulfonates, eugenol, isoeugenol, guaiacylethanol, and guaiacylpropanol.

In situ FTIR Study of the Adsorption of Formaldehyde, Formic Acid, and Methyl Formiate at the Surface of TiO2 (Anatase)

Abstract: The catalytic properties of TiO2 (anatase) in the reactions of formaldehyde oxidation and formic acid decomposition are examined. At 100–150°C, formaldehyde is converted into methyl formate with high selectivity regardless of the presence of oxygen in the reaction mixture. Formic acid is decomposed to CO and water. Surface compounds formed in the reactions of formaldehyde, formic acid, and methyl formate with TiO2 (anatase) are identified by in situ FTIR spectroscopy. In a flow of a formaldehyde-containing mixture at 100°C, H-bonded HCHO, dioxymethylene species, bidentate formate, and coordinatively bonded HCHO are observed on the TiO2 surface. In the adsorption of formic acid, H-bonded HCOOH and two types of formates (bidentate and unsymmetrical formates) are formed. In the adsorption of methyl formate, H-bonded HCOOCH3, HCOOCH3 coordinatively bonded via the carbonyl oxygen, and bidentate formate are identified.

Distinguishing between the homogeneous and heterogeneous mechanisms of catalysis in the Mizoroki-Heck and Suzuki-Miyaura reactions: Problems and prospects

Abstract: This review presents a critical analysis of experimental methods used in distinguishing between the homogeneous and heterogeneous catalytic mechanisms in the Mizoroki-Heck and Suzuki-Miyaura reactions. The main problems arising in the interpretation of data obtained by these methods are discussed. It is demonstrated that it is necessary to take into account the dynamics of the interconversion of molecular, nanosized, and larger palladium species that is independent of the catalyst precursor type (dissolved or solid). The role of the in situ formation of colloidal palladium particles in the case of a supported catalyst precursor is considered.

Kinetics of Detonation Initiation in the Supersonic Flow of the H2 + O2 (Air) Mixture in O2 Molecule Excitation by Resonance Laser Radiation

Abstract: The possibility of initiating detonation in the supersonic flow of the H2 + O2 (air) mixture behind the front of the inclined shock wave by O2 molecule excitation to the O2(a1Δg) and O2(b1·+g) states by laser radiation with a wavelength λI = 1.268 μm and 762 nm is considered. Resonance laser radiation intensifies chain combustion due to the formation of new pathways for generating active atoms O· and H· and radicals OH and has a substantially nonthermal character. Even at low (∼3 kJ/cm2) energies of radiation with λI = 762 nm applied to the gas, detonation combustion can occur even at a distance of 1 m from the front at the gas temperature as high as 600 K.