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RISS 인기검색어
- 검색키워드
- 저자 : Ismagilov, Zinfer R. (검색결과 5 건)
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HYDROCARBON - AMMONIA MOULDING-A NEW TECHNOLOGY FOR PRODUCTION OF COMBUSTION CATALYSTS
Ismagilov, Zinfer R .,Shkrabina, R . A .,Koryabkina, Natalia A . 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.3
Fluidized bed catalytic combustion has proved to be very promising for industrial application. The milestone problem is development of support and catalyst with high mechanical and thermal stability. We have developed a new technology for production of alumina supports with desired spherical shape, texture and structure. Properties of spherical granules depend on the method of granulation and most attention has been paid to development and optimization of hydrocarbon-ammonia moulding to produce uniform alumina spheres. Optimization of high quality spheres production focused on study of effect of initial hydroxide properties and molding conditions on properties of final product. Modification of spherical alumina with oxides of Mg, La, Ce, and Si proved to be effective to substantially improve the mechanical and thermal stability. This effect is most pronounced when pairs of these dopes are introduced simultaneously.
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Study of Catalysts for Catalytic Burners for Fuel Cell Power Plant Reformers
Ismagilov, Zinfer R.,Kerzhentsev, Mikhail A.,Sazonov, Vladimir A.,Tsykoza, Lidia T.,Shikina, Nadezhda V.,Kuznetsov, Vadim V.,Ushakov, Vladimir A.,Mishania, Sergey V.,Kozhukhar, Nikolay G.,Russo, Genna 한국화학공학회 2003 Korean Journal of Chemical Engineering Vol.20 No.3
Catalytic burners for fuel cell power plant reformers are alternatives to conventional flame burners. Their application is expected to provide uniform temperatures in the reformer, efficient use of low-calorific gaseous byproducts and reduction of pollutant emissions. For testing in the burners, a series of spherical Pd/CeO_2/Al_2O_3 catalysts were prepared. An optimum concentration of ceria providing the highest thermal stability of catalysts was determined. An effect of catalyst activation in the reaction mixture-1% methane in air was observed. A series of Mn containing oxide catalysts on spherical y-Al_2O_3 or (y+x)-Al_2O_3, both pure and doped with La, Ce and Mg oxides were prepared. The catalysts were characterized by chemical analysis, X-ray phase analysis, BET surface area and activity measurements in methane oxidation. A batch of Mn-Mg_La-Al-O catalyst was prepared for further long-term testing in a model reformer with a catalytic burner. A model reformer with a catalytic burner was designed and fabricated for testing in the composition of the bench-scale Fuel Cell Power Plant, Preliminary testing of this catalyst showed that it provided complete methane combustion an the specified operational temperatures over 900℃.
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Review : Hydrocarbon-Ammonia Moulding-A New Technology for Production of Combustion Catalysts
( Zinfer R. Ismagilov ),( R. A. Shkrabina ),( Natalia A. Koryabkina ) 한국화학공학회 1997 Korean Journal of Chemical Engineering Vol.14 No.3
Fluidized bed catalytic combustion has proved to be very promising for industrial application. The milestone problem is development of support and catalyst with high mechanical and thermal stability. We have developed a new technology for production of alumina supports with desired spherical shape, texture and structure. Properties of spherical granules depend on the method of granulation and most attention has been paid to development and optimization of hydrocarbon-ammonia moulding to produce uniform alumina spheres. Optimization of high quality spheres production focused on study of effect of initial hydroxide properties and molding conditions on properties of final product. Modification of spherical alumina with oxides of Mg, La, Ce, and Si proved to be effective to substantially improve the mechanical and thermal stability. This effect is most pronounced when pairs of these dopes are introduced simultaneously.
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Fuzzy Regression Analysis using Trapezoidal Fuzzy Numbers
Ilyas Idrisovich Ismagilov,Ghena Alsaied 대한산업공학회 2020 Industrial Engineeering & Management Systems Vol.19 No.4
As a widely used method, regression analysis plays an increasingly important role in creating statistical models and making forecasts in the field of economics and finance. The use of traditional regression for modeling socio-economic processes is not sufficiently substantiated in some situations. Currently, a new direction is being actively developed, associated with fuzzy regression analysis and its application as an alternative to classical methods for modeling economic phenomena. Fuzzy regression methods are based on the theory of fuzzy sets. A number of methods and their modifications are proposed for constructing fuzzy regression models, but most of them use triangular fuzzy symmetric numbers. In this paper, we propose a new method for constructing linear fuzzy regression using trapezoidal fuzzy numbers. The method is based on dividing the sample using a regression model which is estimated by using the ordinary least squares. Two fuzzy regressions using triangular numbers are estimated from the formed samples, on the basis of which a fuzzy model with trapezoidal fuzzy numbers is constructed. Basing on the proposed method, a linear fuzzy model of the gross regional product as an indicator of the economic development of the Republic of Tatarstan of Russia is constructed depending on a number of factors. A comparative assessment of the quality of fuzzy regression models using triangular and trapezoidal numbers was performed.
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Safin V. A.,Kuznetsov P. N.,Avid B.,Kuznetsova L. I.,Fan Xing,Ismagilov Z. R. 한국탄소학회 2022 Carbon Letters Vol.32 No.4
The team has studied the relationship between the ability of the coals to be dissolved in crude anthracene oil and their composition. The coal samples taken from different deposits in Russia and Mongolia were characterized by different stages of metamorphism and tested by the Fourier transform infrared spectroscopy and Carbon-13 nuclear magnetic resonance. The data of a correlation analysis enabled us to find out that an amount of aromatic structures in coal macromolecules provided the main influence on the thermal dissolution of the coals. The middle-rank coals had the highest rates of coal organic matter transfer to liquid products. The data showed that the dissolution process was accompanied by destruction of weak bonds among aliphatic groups. The amount of methylene groups in the aliphatic part of coal macromolecules had a direct impact on conversion of the coal organic matter into soluble products.
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