Influence of lanthanum concentration on acid and catalytic properties of H-pentasil in the μ-xylene isomerization reaction

Russian Journal of Applied Chemistry - Acid and catalytic properties of pentasil-type lanthanum-containing zeolites in the μ-xylene isomerization reaction were studied.     

The magnetoelastic interaction of exchange nature

An expression for the energy of the magnetoelastic interaction of the exchange nature in magnetic structures and an analysis of the conditions when it is nonzero is presented. The effect of a magnetic field on these conditions is considered on the example of specific materials of hexagonal structures, and an important role of phase transitions on the magnetic field with the restructuring of the magnetic structure is noted.     

Performance of conversion efficiency of a bifacial silicon solar cell with particle irradiation

This paper investigates theoretically the performance of conversion efficiency of a bifacial silicon solar cell with particle irradiation. The bifaciality coefficient and the conversion efficiency are calculated for various rear side illumination conditions and electron fluence, taking into account the diffusion length related damage coefficient. The main purpose of the work is to show that irradiation could significantly degrade both the bifaciality coefficient and then the conversion efficiency of the bifacial solar cell and to exhibit the role of the fluence and rear side illumination condition level in the performance of the bifacial silicon solar cell.     

Influence of phosphorus content on physicochemical and catalytic properties of H-pentasil in m-xylene isomerization and toluene methylation

Physicochemical and catalytic properties of H-pentasils in m-xylene isomerization and toluene methylation were studied.     

Glass Formation in the Ternary System La<Subscript>2</Subscript>O<Subscript>3</Subscript>–As<Subscript>2</Subscript>S<Subscript>3</Subscript>–Er<Subscript>2</Subscript>O<Subscript>3</Subscript>

The boundaries of the glass formation region in the ternary system La₂O₃–As₂S₃–Er₂O₃ were found. Transparent glass of composition (La₂O₃)_0.03(As₂S₃)0.90(Er₂O₃)0.07 was studied by X-ray photoelectron and Raman spectroscopy. The intensities of the bands characterizing As–S, La–O, and Er–O bonds increased, and these bands were shifted toward higher energies. This was due to an increase in the covalence of these bonds and probably due to the formation of new bonds in the glasses. Samples in the glass formation region are resistant at 300 K to air, water, and organic solvents.     

Production of High-Octane Gasolines from Bioethanol on Zn-Modified HZSM-5 Zeolite

Moscow University Chemistry Bulletin - The influence of the concentration of zinc introduced into HZSM-5 on its acidic and catalytic properties in the conversion of ethanol into high-octane...