Nauka innov. 2005, 1(2):58-72
https://doi.org/10.15407/scin1.02.058

S.O. Soloviev, S.N. Orlik
L.V. Pisarzhevskii Institute of the Physical Chemistry, NAS of Ukraine, Kyiv

 

Catalytic Neutralizers of Exhaust Gases of Internal Combustion Engines

Section: Scientific and Technical Innovative Projects of National Academy of Sciences of Ukraine
Language: Ukrainian
Abstract: Scientific and technological approaches to synthesis of block honeycomb structure catalysts for purifying gaseous exhausts of internal combustion engines have been developed. Technology of ceramic block matrices of honeycomb structure, made of synthetic cordierite, with temperature coefficient of linear expansion not exceeding 1.2⋅10-6 degree-1 has been developed and tried out. Methods of synthesis and applying (onto ceramic block matrices) of fine-dispersed Al2O3 with prevailing size of the particles 2–4 nm, which provide increase in specific surface of said blocks up to 18–20 m2/g, have been developed. It has been found that stabilization of secondary carrier through modifying with CeO2 and La2O3 causes increase in thermostability of porous structure up to 900°C. Methods of applying active components (Pt, Pd, Rh) onto block matrices by means of consecutive impregnation from aquatic salt solutions have been developed. Optimization of thermoprocessing mode of catalytic coat was found to stabilize active components on catalyst surface and increase their activity and thermostability. It has been demonstrated using engine stand tests that aforementioned catalysts surpass foreign ones, in particular manufactured at firms Walker Germany) and Linda Gobex (Poland), concerning effectivity of purification of gas emissions. Technology as well as manufacture of catalysts for purification of exhaust gases of ICEs have been tried out and, respectively, adjusted at Experimental Plant "Catalysis and Ecology" of L. V. Pisarzhevskij Institute of Physical Chemistry of NAS of Ukraine. A design and model lots of catalytic neutralizers for "ZAZ" and "VAZ" cars have been developed and, respectively, manufactured in cooperation with "Zaporizhya's automobile plant" and CSA "Novokramatorsk's machine plant".
Key words: catalytic neutralizers, cordierite, secondary carrier, platinum metals, technology.

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