Determining the expansion pressure of coking batch: An analytical review

Laboratory, semiindustrial, and industrial methods of determining the expansion pressure of coking batch are subjected to critical analysis. There is no standardized method by which the expansion pressure may be calculated within a single apparatus over a wide range of packing densities-from loose charge to rammed charge.     

Stabilized treatment of recycled water in byproduct capture shop

Problems in the cooling-water cycle are addressed. Data are presented regarding the treatment of the recycled cooling water and the coking byproducts by Nalco reagents.     

Use of unmolded refractories in boiler furnaces operating with biofuels

Experience in the fabrication of the elements of furnaces that function on biofuels in boilers fabricated from refractory concretes, concrete gunite compound, and heat-insulating materials was gained in Ukraine in the period from 1997 to 2010. Husks of sunflower plants and of buckwheat (17 boilers) and wood sawdust (11 boilers) were used as the biofuel. Factors that govern the operating life were established.     

Production of nanopowders of yttrium-aluminum garnet by the Pechini method

Results are presented from the synthesis of nanopowders of yttrium-aluminum garnet by the Pechini method. It is established that the Pechini method is a promising technology for producing optically transparent ceramics.     

Ceramic filters for multi-stage treatment of industrial and household waste

Results of studies focused on the creation of efficient ceramic filters for multi-stage treatment of industrial and household wastes based on natural alumosilicate and technogenic starting materials are presented. The influence of the individual components of the charge on the basic structurally sensitive properties of ceramic materials is established. Compositions of compounds for the fabrication of the carriage of filters with tubular configuration are considered.     

Biocatalitic Oxidation of 2,3,6-Trimethylphenol Over Immobilized Horseradish Peroxidase in Nonaqueous Media

In this work various samples of horseradish peroxidase immobilized over organic and inorganic supports were synthesized and studied in 2,3,6-trimethylphenol biocatalitic oxidation. Silica, alumina and commercial samples of polymers MN-100, Sepabeads EC-HA were used as the carriers for horseradish peroxidase. Different methods of immobilization including treatment with chitosan, glutaric dialdehyde and carbodiimide were used to enhance catalytic activity. For synthesized catalysts optimal conditions for 2,3,6-trimethylphenol (main intermediates in vitamin E synthesis) oxidation providing high degree of conversion (more than 95%) and high selectivity to target products (more then 98%) were found. Physicochemical investigations (FTIR spectroscopy, XPS, nitrogen physosorption) of optimal biocatalytic systems were provided.     

Combustion of metallothermic mixtures FeO-Cr<Subscript>2</Subscript>O<Subscript>3</Subscript>-Al-C: Influence of carbon granularity and localization

Combustion of metallothermic mixtures FeO-Cr₂O₃-Al-C in air at normal conditions was studied upon variation in the size of carbon (graphite) particles and carbon localization in a green sample. Carburization conditions were optimized in terms of graphite particle size.     

Coke quality on adding coking byproducts to the batch

Conditions for the granulation and heat treatment of coking byproducts—heavy coal tar, acid tars, and distillation residues—are developed so as to produce suitable additives for coking batch. It proves possible to improve poorly clinkering batch by adding a mixture of coal and acidic tar from the sulfate department.     

Ethylene carbonate in extraction and absorption: A review

Research on extraction and absorption by ethylene carbonate in chemical technology is reviewed.     

Methods of determining coke quality

Methods of determining coke quality are compared.