The constantly increasing growth in the number of cars is one reasons for deterioration ecological situation cities and large settlements. In Kazakhstan, on a national scale, share motor vehicles total emissions pollutants into atmosphere by all technogenic sources reaches average 40%, mass industrial waste - 2%. content toxic substances exhaust diesel gasoline engines varies depends type engine mode operation, as well quality fuel, composition combustible mixture cylinders, speed driving...

In this study, a single-cylinder CRDI engine running on 20MEWCO (20 % Methyl Esters of Waste CookingOil + 80 diesel) fuel was used to test various pilot injection timing modifications, including 34°, 36°, and 38° bTDC with dwell period 15° 10 mass at pressure 500 bar. The analysis focused cylinder pressure, heat release rate, consumption, brake thermal efficiency, emissions carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), smoke. As result advanced timings, bTDC, the efficiency...

The article describes some variants of mechanisms nitro compounds reduction, offered by authors in the scientific literature. focus is on description work Kazakh and Russian chemists working field catalysis. In most works, classical scheme mechanism hydrogenation Haber-Lukashevich nitrobenzene confirmed detailed experimental methods. One interesting aspect Ya.A. Dorfman which used orbital theory approach constructed light modern representations valid for group various catalysts. Among...

In this work, the synthesis of magnetite nanoparticles and catalysts based on it stabilized with silicon aluminum oxides was carried out. It is revealed that stabilization surface by using leads to a decrease in size nanocrystals nanocomposites (particle diameter less than ~10 nm). The catalytic activity obtained evaluated during oxidation reaction phenol, pyrocatechin cresol oxygen. well known phenolic compounds are among most dangerous water pollutants. effect phenol concentration...

Liquid-phase hydrogenation of benzene ring in gasoline fractions Atyrau Oil Refinery LLP (Kazakhstan) was studied.Mono-and bimetallic catalysts on the basis platinum metals various carriers were synthesized.It succeeded to reduce aromatic compounds content (totally) for "hydrogenate" fraction 0.6-4.64 % (in initial -11.2 %), and also completely exclude from final sample or its quantity 0.06 -2.54 %).For "stable catalysate" reduced 0.15 wt.% -5.17 wt.), conversion -97 %.For decreased 13.70...

The purpose of this work was to create magnetic nanocatalysts that could be used for the oxidation organic water pollutants – phenol and its derivatives determine physicochemical characteristics catalysts. development such active nanocomposite catalysts would solve environmental problem in Republic Kazakhstan field wastewater treatment from impurities, including phenols, also contribute subsequent creation domestic production oxygen-containing compounds, since almost entire spectrum...

Remediation of industrial discharged dyes to the water bodies is much needed in current scenario. Here this, we prepared silver nanoparticles using Anisomeles malabarica. The synthesized were characterized by Fourier transform infrared study, scanning electron microscopy, dynamic calorimetry, and thermogravimetric analysis. All characterization studies suggested that formation was successful. used as an adsorbent adsorb methylene blue. To achieve optimum pH dye studied, it found be 7. dose...

The development of new catalytic systems based on cobalt and iron compounds for the production oxygen-containing is an urgent task chemical technology. purpose this work synthesis CoFe2O4 stabilized with polyvinylpyrrolidone (PVP), study catalyst by physico-chemical research methods, determination effectiveness CoFe2O4/PVP in phenol oxidation reaction. In work, magnetic composites were synthesized co-deposition. A comparison characteristics properties (II) ferrite (CoFe2O4) composite...

A special place among the chemical transformations of nitro compounds is reduction reaction allowing production valuable amines.In this review, focus on discussion nickel and iron-containing catalysts.Nickel most common catalyst for various substances, including compounds.Along with Raney different nickel-based catalysts are used: black, Ni/Al2O3, Ni/C, Ni/kieselguhr, Ni/SiO2, Ni/ZnO, Ni/MgO, Ni-Cr2O3/C.Today successfully used in processes (Fischer-Tropsch synthesis, Gaber-Bosch,...

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The paper describes the hydrogenating thermo-catalytic processing of plastic waste on developed new catalysts based natural zeolite from Tayzuzgen deposit (Kazakhstan), with molybdenum additives (on base (NH 4 ) 6 Mо 2 O 24 •4H O).Fuel oil Kumkol field characterized by a high content paraffin hydrocarbons, pour point and low sulfur was used as additional raw material, source hydrogen paste generator.Analysis reaction products shows that process proceeds mainly formation aromatic compounds,...

Currently, the problem of creating effective technologies and highly active stable catalysts for complete purification or post-treatment industrial wastewater from phenols is one most urgent difficult to solve.Phenols contained in are called "phenolic wastewater".Phenol pollutants, toxic animals humans, destructive many microorganisms.Deep catalytic oxidation substances methods natural impurities phenol-containing compounds.Among modern systems field fine organic synthesis solving...

The purpose of this study was to prepare briquettes based on coal from the Oy-Karagay deposit (Kazakhstan) and polymers, determine their physicochemical technological properties. Coal were prepared according classical technology, which consists grinding coal, drying it a certain moisture, mixing with binders, heating charge, pressing cooling. It found that mechanical dispersion briquette PET does not cause destruction aggregates. After calcination main phase remains amorphous carbon mineral...

The paper describes the study of gasoline fraction hydrofining on zeolite-containing alumina catalysts modified with variable valence metals, additives phosphorus and a rare-earth element.In this work, new were developed: NiO-MoO 3 -E-P-HZSM-HY-Al 2 O , CoO-MoO CoO-WO -E-P-Al -ZSM, where E is element.The research was carried out under high-pressure at flow installation fixed catalyst bed.The smallest residual sulfur content (0.0005%) observed in hydrotreated which 2-4 times lower than...

The paper discusses the issues of catalytic cracking processes and presents experimental results authors with use catalysts based on natural Shankanai zeolite (Kazakhstan) heteropoly acids (HPA).SEM analysis synthesized catalyst structure indicates presence its main elements prevailing surface zeolite.Also, intense spectra components HPA (tungsten phosphorus) are revealed.Possibly, it is because high degrees dispersion distribution PW12-HPA particles over clinoptilolite surface.In this...

Oriental Journal of Chemistry is a peer reviewed quarterly research journal pure and applied chemistry. It publishes standard papers in almost all thrust areas current chemistry academic commercial importance. provides platform for rapid publication quality papers, reviews letters. abstracted indexed reputed National International agencies.

The article describes the study of regularities oxidative cracking vacuum gas oils Atyrau and Zhetybay oil on composite catalysts based natural zeolite Taizhuzgen Narynkol clay.During synthesized zeolite-containing catalysts, an increase in coke formation is observed comparison with inert atmosphere.These data indicate a magnification catalytic destruction high molecular weight hydrocarbons presence traces air.The influence fractional composition processed feedstock laws process was...

This study aimed to prepare catalysts on the base of Kazakhstan raw materials and test them in oxidative catalytic cracking fuel oils.It was determined influence air route reactions establish relationship between parameters degree conversion high molecular weight hydrocarbons light products.It found that additives contribute a deeper degradation starting material.According IR spectra, gasoline carried out without catalyst contains sulfur compounds bound oxygen atom (927-1,007 cm -1 ) carbon...

Oriental Journal of Chemistry is a peer reviewed quarterly research journal pure and applied chemistry. It publishes standard papers in almost all thrust areas current chemistry academic commercial importance. provides platform for rapid publication quality papers, reviews letters. abstracted indexed reputed National International agencies.

Oriental Journal of Chemistry is a peer reviewed quarterly research journal pure and applied chemistry. It publishes standard papers in almost all thrust areas current chemistry academic commercial importance. provides platform for rapid publication quality papers, reviews letters. abstracted indexed reputed National International agencies.