Eastern Donbass Research Articles

Eastern Donbass Resources as Improvement Factor in the Fuel and Energy Competitiveness Sector of Russia

Authors consider possible development ways of the Russia coal industry. Researchers recognize that the world economic crisis had an essential negative impact on the coal industry in general. Research relevance consists in resource analysis of the East Donbass coal basin, whose social and economic situation represents a particular interest in connection with a political situation in the Ukraine border regions, in the Donetsk national republic. East Donbass (160 billion t) is in the west of the Rostov region. Basin coals, as well as in the main Donbass have high quality. The predominant energy, anthracite coal with a high calorific value, there are almost no coking coal. The small power of layers (the majority from several centimeters to 1 m), a deep water of development (on average 350 m, the greatest - over 1000 m) do an expensive coal rather. The coal industry state and development are defined by the following factors: size of mineral reserves; coal quality; mining-and-geological conditions; mine fund; scientific-technical progress; working conditions; economic factors. DOI: 10.5901/mjss.2015.v6n3s6p329

Title of simulation of the physicochemical processes of high-temperature treatment of carbon products in Acheson furnaces

A mathematical simulation technique for physicochemical processes occurring in the manufacture of electrode products in the Acheson graphitization furnaces was considered. The effects of the physicochemical properties of the carbon heat insulation of the furnace on the structure of its thermal field and the processes of mass transfer and gas evolution initiated by this field were studied. It was shown that, with the use of the carbon heat insulation based on anthracites from the Eastern Donbass, the homogeneity of the thermal field in the products treated can be substantially increased, whereas the thermal load on the refractory lining of the furnace can be decreased. The experimental data of commercial tests of different heat insulation compositions were given. The processes of silicon carbide formation in heat insulation were analyzed, and the areas of possible use of solid carbonaceous wastes from graphitization processes were determined.

97/04157 Complex approach to the issue of decreasing occupational diseases during stripping of thin and extremely thin layers of coal at Eastern Donbass mines

Despite the recent remarkable advances in the development of Cu-zeolite materials for selective catalytic reduction (SCR) of NOx with NH3, their performance is not immune to the poisoning by sulfur oxide species SO2 and SO3, commonly referred as SOx. Periodic removal of SOx, i.e. deSOx, is needed to maintain high NOx conversion efficiency of these catalysts even when ultra-low sulfur diesel (ULSD) fuel is used. Such deSOx events require high temperatures, typically in excess of 550 °C, which can be detrimental to the durability of the SCR catalysts and other aftertreatment components, and may also result in a fuel penalty. In this work, a recently discovered method, herein referred to as chemical deSOx, was found to be effective for removal of sulfur and for recovery of NOx conversion at substantially lower temperatures. The method relies on the use of low concentrations of reductants under net oxidizing conditions, arguably by inducing a locally reducing environment on the catalyst surface through different chemical mechanisms. Reductants such as NOx + NH3, NH3, C3H6 and n-C12H26 were demonstrated to achieve the removal of sulfur species without resorting to high temperatures. It is proposed that the change of the oxidation state of Cu sites in response to these exposures, achieved through different chemical mechanisms depending on the reductant, was responsible for facilitating the removal of sulfur from the catalyst.