Synthesis and Properties of Magnetically Susceptible Porous Carbon Materials Based on Hydrolysis Lignin Modified with ZnCl2 and FeCl3

Russian Journal of Applied Chemistry - A method for the disposal of hydrolysis lignin waste based on its modification with ZnCl2 and FeCl3 and subsequent carbonization at 800°C was proposed....     

Catalytic pyrolysis of propane-butane hydrocarbon mixture on the composite ceramic materials in an open system

Catalytic pyrolysis of propane-butane hydrocarbon mixture on the composite ceramic materials with the surface modified with zinc-, cadmium- phosphorus- and silicon-containing compounds in an open system was studied in the temperature range 500–850°C, at the rate of the gas mixture flow 20–200 ml min⁻¹, contact duration 0.75–155 s, and the values of the heterogeneity factor 2.0 to 2.9×10⁵ cm⁻¹. The catalytic activity of the systems under similar conditions was compared, the influence of various factors on the yield of ethylene and propylene was investigated and the sooting was estimated.     

Oxidation of CO on Zr-, Fe-, Cr-, Ni-, and Cu-containing Catalysts Prepared by Pyrolysis of Metal β-Diketonates on a Synthetic Ceramic Foam

Catalytic systems containing Zr, Fe, Cr, Ni, and Cu composite coatings were suggested for oxidation of CO to CO₂. The coatings were prepared by gas-phase thermolysis of metal acetylacetonates and hexafluoroacetylacetonates on a synthetic ceramic foam. The kinetic and activation parameters of the CO oxidation on these catalysts were determined, and the relative activities of the catalysts were evaluated.     

Oxidation of CO on Mn-Containing Catalysts Prepared by Pyrolysis of Metal β-Diketonates on Synthetic Ceramic Foam

New catalytic systems for oxidation of CO to CO₂ were developed. These systems are based on composite Mn, Mn-Ni, and Mn-Cu coatings and are prepared by gas-phase thermolysis of metal β-diketonates on a ceramic foam support. The relative activity of the new catalytic systems was examined. The kinetic and activation parameters of the oxidation of CO on these catalysts were determined.     

Kinetic features of thermal decomposition of cobalt acetylacetonate and development of catalysts for the oxidation of carbon monoxide,based on the decomposition products

The kinetic features of thermal decomposition of cobalt acetylacetonate in a vacuum were elucidated, and the volatile thermolysis products were identified. The homogeneous-heterogeneous character of the process was shown. Catalysts for the oxidation of CO to CO₂ were developed on the basis of cobalt acetylacetonate decomposition products and synthetic cellular ceramics, and the kinetic and activation parameters of the oxidation were determined.Translated from Zhurnal Obshchei Khimii, Vol. 74, No. 11, 2004, pp. 1770–1774.Original Russian Text Copyright © 2004 by Tsyganova, Didenkulova, Shekunova, Faerman, Aleksandrov.This revised version was published online in April 2005 with a corrected cover date.     

Catalytic pyrolysis of the propane-butane hydrocarbon raw material

Principal characteristics are determined of the process of pyrolysis of the propane-butane hydrocarbon raw material in a steel reactor in the presence of catalysts (ceramic film type polyphosphate covering on the steel reactor walls) containing metals of II and III groups of Periodical Table with the overall composition Me _x O _y ·z(P₂O₅), where x = 1, 2; y = 1, 3; z = 2, 3. By the investigation a sequence of catalytic activity of the samples of the metal-containing coverings by their effect on the yield of ethylene and propylene is elucidated: Zn > Cd > Sr > Ce. The similar sequence corresponds to inhibiting activity at the cocking inhibition.     

Researches on imidazoles

A number of derivatives of imidazo [5, 1-b] thiazole, imidazo [5, 1-b] thiazoline, and imidazo [5, 1-b] thiazolid-3-one are synthesized by cyclizing 2-alkyl-4(5)-nitro-5(4)-formylmethyl (-ketoalkyl-,-hydroxyethyl-, and carboxymethyl) mercaptoimidazoles.For Part XXVI see [18].     

Spectral-luminescence properties of a number of new heterocyclic compounds in solutions

Results of the spectral-luminescence investigation of solutions of new heterocyclic compounds are given. The relationship between the structure of the heterocyclic compounds and their spectral-luminescence characteristics is analyzed. The concentrations are established beginning with which the concentration quenching of luminescence occurs. Double luminescence manifested by certain compounds is related to their existence in the form of isomers. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 67, No. 3, pp. 336–339, May–June, 2000.     

Preparation and Structural and Electrochemical Characteristics of a Carbon-Containing Material Based on Aspen Bark Modified with Zinc and Iron Chlorides

Russian Journal of Applied Chemistry - The possibility of using aspen bark modified with zinc and iron chlorides for preparing highly porous materials with specific properties was examined. The...     

Synthesis and Properties of Carbon Gels Based on Larch Bark Tannins and Hydrolysis Lignin

Russian Journal of Applied Chemistry - Porous carbon tannin–lignin/formaldehyde and tannin–lignin/furfuryl gels were prepared by carbonization of organic gels synthesized by...