Major pollutants emission from Direct-Injection (D.I) diesel engines are predicted by means of a mathematical model. In order to construct such a model, an integral Multi-Zone Combustion Model (MZCM) is formulated, which basically consists of jet mixing and combustion submodels. In MZCM, variation of injection pressure is considered. Also time period of ignition delay is predicted by considerin...

After the discovery of ANaerobic AMMonium OXidation (anammox) in the environment, the role of heterotrophic denitrification as the main marine pathway for fixed N loss has been questioned. A 3 part, 15 month time series investigating nitrite reductase (nirS) mRNA transcripts at a single location in the Black Sea was conducted in order to better understand the activity of anammox and denitrifyin...

The oxidation mechanism of metals depends, among other factors, on the surface integrity. and rim zone properties are often determined by manufacturing process that was used to machine material. Laser chemical machining (LCM) is a uses laser radiation as localized selective heat source activate reaction between an electrolyte metallic surface. objective this work first investigate how different...

Cr5Mo steel with high thermal strength is frequently applied as the material for hydrocracking furnace tubes. Nonetheless, tubes are prone to failure in a high-temperature environment, threatening production safety. Considering that IN718 nickel-base superalloy has favorable oxidation resistance, coating was fabricated on substrate through laser cladding. The effect of process parameters resist...

The paper presents the results of experimental studies on implementation electric arc synthesis boron carbide using carbon with different morphology and origin as a feedstock: fibers, flake graphite, obtained by pyrolysis plant waste, namely, pine sawdust cedar nuts husks. A feature method used is its an original plasma reactor atmospheric air working gas medium. Oxidation feedstock products in...

The possibilities of obtaining aluminum matrix composite materials the composition Al-Al 2 O 3 are considered by method liquid-phase oxidation purging melt with oxygen. obtained a two-phase system different concentrations solid phase. An algorithm for calculating kinetics in oxide phase an is proposed. It established that beginning and completeness reaction on surface gas bubble determines synt...

The high-temperature oxidation and the thermal destruction of electrically heated tungsten molybdenum filaments in air arestudied experimentally. temperature histories are obtained, successive stages defined. It isshown that phase transition points oxides determine limits these stages. filament conditions established: diameter central zone, electric current corresponding to failure, as well bur...

first row transition metal complexes of phthalocyanine are employed as catalysts for the oxidation of cyclohexene and cyclooctene using iodosylbenzene and pentafluoroiodosyl benzene. the catalysis was performed in dichloromethane: methanol:water (80:18:2) solvent mixture.  the products of the catalysis for cyclohexene are epoxycyclohexane, 2-cyclohexene-1-ol and 2-cyclohexene-1-one whereas for ...