Search

Your search keyword '"Alexey Pestryakov"' showing total 4 results
Start Over Author "Alexey Pestryakov" Publisher the authors. published by elsevier b.v.
4 results on '"Alexey Pestryakov"'

1. Identification of Polymer Deposits in the High-pressure Recycling System of Low-density Polyethylene Production

Author

Edward Mayer, A. Trofimova, E.O. Koval, and Alexey Pestryakov

Subjects
Materials science, рециркуляция, полиэтилен, Chemistry(all), XRD, отложения, Analytical chemistry, компрессоры, low-density polyethylene, идентификация, deposition, Gel permeation chromatography, chemistry.chemical_compound, symbols.namesake, Differential scanning calorimetry, Fourier transform infrared spectroscopy, высокое давление, chemistry.chemical_classification, ИК-Фурье спектроскопия, низкая плотность, вискозиметрия, Viscometer, General Medicine, Polymer, Polyethylene, NMR, Low-density polyethylene, Fourier transform, chemistry, сканирующая калориметрия, FTIR, symbols, полимеры, Chemical Engineering(all), хроматография, ЯМР-спектроскопия
Abstract

This paper outlines the results of analysis of Low-Density Polyethylene (LDPE) depositions on filter elements of upstream II cascade compressor by means of X-ray and Fourier transform infrared spectroscopies, gel permeation chromatography and viscometry, differential scanning calorimetry and 13C NMR spectroscopy. Based on comparison with experimental data of process designers the supposition has been given to the cause of the formation.

Full Text
View/download PDF

2. Adsorption of Ar and N2 on Dealuminated Mordenite Tuffs

Author

Edgar Ayala, Fernando Rojas, Alexey Pestryakov, Karla Ortega, Roberto Portillo, Vitalii Petranovskii, Omar Romero, Miguel Ángel Hernández, and Efraín Rubio

Subjects
адсорбция, Argon, tuff, Chemistry(all), туфы, Inorganic chemistry, chemistry.chemical_element, General Medicine, мордениты, Nitrogen, Mordenite, nitrogen, Ion, деалюминирование, Nanopore, Adsorption, chemistry, mordenite, adsorption, аргон, argon, Chemical Engineering(all), азот, dealumination
Abstract

This paper describes the adsorption of nitrogen and argon on pores in natural mordenites before and after acid leaching treatment. The exchange with H+ ions during dealumination favors the creation of emergent pores thus causing an increase of the adsorption capacity. The development of nanopores in mordenites was evaluated through the Dubinin-Astakhov and Barrett-Joyner-Halenda methods.

Full Text
View/download PDF

3. Engineering of Supported Nanomaterials

Author

Vitalii Petranovskii, Alexey Pestryakov, and Karla Juarez-Moreno

Subjects
нанообъекты, Materials science, Chemistry(all), Interface (Java), porous matrices, Nanotechnology, General Medicine, Substrate (printing), иерархические системы, Nanomaterials, nanomaterials engineering, инженерия, Chemical Engineering(all), наноматериалы, nanomaterials, Mutual influence, enzyme immobilization
Abstract

This brief review analyzes the parameters that can be used to guide the generation of hierarchic systems that include inorganic and/or biological nanoscale objects. Importance of interface effects and geometrical factors are underlined. The mutual influence between the substrate and the deposited material is an important factor to determine the most appropriate set of parameters for the synthesis of nanomaterials with desirable properties for industrial applications.

Full Text
View/download PDF

4. CO2 Sequestration by Natural Zeolite for Greenhouse Effect Control

Author

Fernando Rojas, Vitalii Petranovskii, Roberto Portillo, Efraín Rubio, Miguel Ángel Hernández, Martha Alicia Salgado, Sinuhe Ruiz, and Alexey Pestryakov

Subjects
адсорбция, Langmuir, Aqueous solution, erionite, Chemistry(all), Mineralogy, carbon dioxide, углекислый газ, sequestration, General Medicine, Microporous material, Erionite, эрионит, chemistry.chemical_compound, Adsorption, chemistry, Chemical engineering, adsorption, Carbon dioxide, Chemical Engineering(all), поглощение, Freundlich equation, Zeolite
Abstract

This paper describes the adsorption of CO 2 on pores in natural erionite exchanged with aqueous solutions of Na + , Mg 2+ , and Ca 2+ salts at different concentrations, variable time and temperature of treatment. Experimental data of CO 2 adsorption were treated by the Freundlich and Langmuir equations. Complementarily were evaluated standard adsorption energies and the degree of interaction of the gas with the zeolite; the evolution of isosteric heats of adsorption was analyzed. The exchange with Na + favors the creation of emergent pores thus causing an increase of the adsorption capacity for CO 2 . The presence of Na + at micropore entrances causes an increased adsorption into the nanocavities and on the external area of the ion-exchanged zeolites. The development of nanopores in erionite was evaluated through the Barrett-Joyner-Halenda and NLDFT methods. Depending on the conditions of the exchange treatment, Na + was found to be most favorable, well distributed, and accessible for N 2 adsorption.

Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results