SYNTHESIS AND TESTING OF CATALYSTS BASED ON THE CENOSPHERES OF FLY ASH OF THERMAL POWER PLANT FOR PROCESSING OF HYDROCARBON RAW MATERIALS
Ibrasheva R. Yemelyanova V. Sassykova L. Dossumova B. Shakiyeva T. Shakiyev E. Baizhomartov B.
2021University of Chemical Technology and Metallurgy
Journal of Chemical Technology and Metallurgy
2021#56Issue 1105 - 115 pp.
The purpose of the work was the synthesis of catalysts based on cenospheres obtained from fy ash and testing their activity in hydrocarbon processing: oxidative cracking of fuel oil and oxidation of methanol to formaldehyde. Collection of microspheres is carried out from the water surface of the pond-ash dump of thermal power plant (TPP-2, Almaty), working on the coals of the Ekibastuz coal deposit (Kazakhstan). Oil of Zhetybai oil field (Kazakhstan), commercial fuel oil and M-100 grade fuel oil were used as cracking raw materials. It was found that the catalysts synthesized are effective for producing light gas oil by cracking. Symmetrical decomposition of high-molecular hydrocarbons contained in the fuel oil was found to be associated with the formation of alkenes and alkanes of homologues, starting with heptene-1 and heptane and ending with octadecene-1 and octadecane. With the simultaneous action on the cracked molecules of the active centers of the optimal catalyst and atmospheric oxygen, a synergy was established in the yield of the middle distillate fraction. It was shown that for the processing of hydrocarbons by catalytic cracking is very effective to pre-conduct electromagnetic effects on the feedstock. The conditions for isolating aluminosilicate microspheres of a certain dispersion and fixing iron molybdate to them have been optimized. The developed Mo-Fe catalysts were tested in the process of methanol oxidation with oxygen. Under optimal conditions, the degree of conversion of methanol was 99.8 % with a selectivity of 100 % conversion of methanol to formaldehyde. The catalyst showed its stability over time and in the studied temperature range (270°С - 450°С).
cenospheres , fuel oil , fy ash from TPP , methanol oxidation , oxidative cracking
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Scientifc and Production Technical Center, “Zhalyn” LLP 172, Bogenbai Batyr str., Almaty, 050012, Kazakhstan
Faculty of Chemistry and Chemical Technology Al-Farabi Kazakh National University, 71, al-Farabi ave., Almaty, 050040, Kazakhstan
Scientifc and Production Technical Center
Faculty of Chemistry and Chemical Technology Al-Farabi Kazakh National University
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