Search

The aspects of chemical desactivation of the pyrophoric sediments using sulfoxides on the oil production facilities during the exploitation of the vertical cylindrical vessels (VCV), which are intended for containing sulphurous oils, are studied in this article. It is found out that sulfoxides, either individual substances or their mixtures, can effectively passivate pyrophoric iron sulphides. The laboratory express-method for separation the pyrophoric sediments, containing pyrophoric iron is also developed.

The intensive development of the gas industry and the tension in the operation of gas transportation equipment make it necessary to solve the problems of developing and introducing new energy-saving gas transportation technologies. The authors carried out simulation of the gas pipeline and laboratory studies, as well as recalculation of the parameters of the experimental plant in relation to the main gas pipelines. It is concluded that the developed twisting device is effective.

The results of studying the fire foams’ modification using organosilicone compounds are presented in this article. The results of comparative fighting flammable liquid fires (diesel fuel) using non-modified foam and modified foam are also studied. It is shown that fire fighting using foam, modified with organosilicone compounds is much more effective, because of the increasing isolating capacity of such foam due to high-solidifying formation of foam which prevent the liquid vapors from getting in the area of chemical reactions and also isolate the flammable liquid from the oxygen of the air. Such a result is possible due to the presence of the mixture of solutions of foaming agent and the organosilicone modifying compound in the structure of the foam – tethraethyl silicate (TES). The results of the study confirm the perspective of using the organic compounds of the silica for improvement the fire extinguishing properties of the foam and its further applying for the fighting with flammable liquid fire.

The problem of electron impact ionization of the hydrogen atom at incident electron energies close to the breakup threshold is considered within the framework of three-particle Faddeev-type equations. To solve these equations an approximated modified strong channel coupling method is applied: each Faddeev component is expanded in the eigenfunctions of the discrete spectrum of the target Hamiltonian and final state wavefunctions. The expression for the triply differential cross sections (TDCS) is given for the coplanar symmetric case of equal energy partition between the final state electrons outgoing in opposite directions.