Russian Journal of Physical Chemistry B 

About: Russian Journal of Physical Chemistry B is an academic journal published by Springer Science+Business Media. The journal publishes majorly in the area(s): Supercritical fluid & Chemistry. It has an ISSN identifier of 1990-7923. Over the lifetime, 2484 publications have been published receiving 9730 citations. The journal is also known as: Russian journal of physical chemistry. B.

Three-dimensional numerical simulation of the operation of a rotating-detonation chamber with separate supply of fuel and oxidizer

Abstract: A three-dimensional numerical simulation of the operation of an annular rotating-detonation chamber (RDC) with separate supply of combustible mixture components, hydrogen and air, is performed, and the calculation results are compared to available experimental data. The model is based on a system of time-dependent Reynolds-averaged Navier-Stokes equations complemented with a turbulence model and continuity and energy equations for a multicomponent reacting gas mixture. The system is solved using a coupled algorithm based on the finite volume method and particle method. Calculations are for the first time performed with allowance for effects of finite rates of turbulent and molecular mixing of the combustible mixture components with each other and with reaction and detonation products. The calculation results compare favorably with the experimental data obtained at the Lavrentyev Institute of Hydrodynamics of the Siberian Branch of the Russian Academy of Sciences.

Overview of catalytic methods for production of next generation biodiesel from natural oils and fats

Abstract: Production of biodiesel from natural oils and fats can be achieved using various technologies briefly discussed in this review. A particular appealing concept for production of green diesel is selective catalytic deoxygenation of renewables leading to diesel fuel products. This reaction can be performed over Pd on active carbon supports with saturated and unsaturated fatty acids and their derivatives.

Oxidation of metal nanoparticles: Experiment and model

Abstract: Studies of oxygen adsorption on a metal surface are reviewed. The relationship between oxygen adsorption and the initial stage of oxidation is considered. Current theories of low-temperature oxidation and experimental data obtained during recent decades are reviewed. Thermodynamic aspects of low-temperature oxidation of metal nanoparticles and their relationship with the physical properties of metal nanoparticles are discussed. An original method for investigating the oxidation kinetics of ferromagnetic nanoparticles is described. The technique is based on continuous measurements of magnetization in the course of oxidation under controlled conditions. A stochastic model of oxidation is presented, which is based on the atomistic concepts of Cabrera-Mott theory. Oxidation is regarded as a random sequence of elementary acts (oxygen adsorption, oxygen ionization, metal ionization, metal ion migration, etc.).

Self-association behavior of an amphiphilic drug nortriptyline hydrochloride under the influence of inorganic salts

Abstract: Herein, the micellization phenomena of an amphiphilic antidepressant drug nortriptyline hydrochloride (NOT) have been studied using tensiometric technique in the absence and presence of different concentration of inorganic salts (NaCl, NaBr and KCl) at 298.15 K. NOT is employed for the relief of symptoms of depression. In presence of inorganic salt the CMC value decreases which is explained on the basis of nature and ion size. Various parameters, i.e., the maximum surface excess concentration at the air/solution interface (Γmax), minimum area per head group at the air/solution interface (Amin), free energy of micellization (ΔG m o), minimum energy of surface (G min) and standard Gibbs energy of adsorption (ΔG ads o) were evaluated and discussed in detail.

Explosive decomposition of PETN with nanoaluminum additives under the influence of pulsed laser radiation at different wavelengths

Abstract: The results of measurements of the threshold of explosive decomposition of PETN with 0.1 wt % additives of aluminum nanoparticles under the action of the first and second harmonics of a YAG:Nd3+ laser with a pulse duration of 12 ns are presented. A comparison of experimental and theoretical results is performed. It is concluded that the absorption of radiation heats the nanoparticles to form chemical decomposition kernels in the vicinity of the hotspot, so that the initiation of explosive decomposition is not associated with optical breakdown of the sample.