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Additives to cracking catalyst based on MeOx/Al2O3 systems (Me = Cu, Fe, Ce, Co, Mn and La) to reduce the content of nitrogen oxides in regeneration gases
https://doi.org/10.18412/1816-0387-2024-6-70-78
Abstract
The influence of the nature of nitrogen-containing compounds introduced into a model cracking feedstock (n-hexadecane) on the composition of regeneration gases formed during catalyst regeneration was studied. An increase in the content of CO and NOx in the composition of regeneration gases was observed with an increase in the basicity and molecular weight of nitrogen compounds in the range: pyridine < n-butylamine < pyrrole < quinoline < indole. The effect of a Pt-based CO promoter on the composition of regeneration gases was studied. The use of a CO promoter reduces CO emissions by 99.4% but leads to a significant increase in NOx emissions. Additives were synthesized and studied to reduce the content of nitrogen oxides in the regeneration gases of a cracking catalyst. The additives were mixed oxides containing Cu, Fe, Ce, Co, Mn and La deposited on γ-alumina. The use of these additives at the stage of regeneration of the cracking catalyst led to a decrease in the content of nitrogen oxides formed during regeneration. For an additive based on copper oxide, the efficiency of reducing the content of nitrogen oxides in regeneration gases reached 12.2%.
About the Authors
E. O. Kobzar
Center of New Chemical Technologies, Boreskov Institute of Catalysis, Omsk
Russian Federation
Russian Federation
T. V. Bobkova
Center of New Chemical Technologies, Boreskov Institute of Catalysis, Omsk
Russian Federation
Russian Federation
O. V. Potapenko
Center of New Chemical Technologies, Boreskov Institute of Catalysis, Omsk
Russian Federation
Russian Federation
M. O. Ananyeva
Center of New Chemical Technologies, Boreskov Institute of Catalysis, Omsk
Russian Federation
Russian Federation
D. N. Ogurtsova
Center of New Chemical Technologies, Boreskov Institute of Catalysis, Omsk
Russian Federation
Russian Federation
V. A. Koveza
Center of New Chemical Technologies, Boreskov Institute of Catalysis, Omsk
Russian Federation
Russian Federation
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Review
For citations:
Kobzar E.O., Bobkova T.V., Potapenko O.V., Ananyeva M.O., Ogurtsova D.N., Koveza V.A. Additives to cracking catalyst based on MeOx/Al2O3 systems (Me = Cu, Fe, Ce, Co, Mn and La) to reduce the content of nitrogen oxides in regeneration gases. Kataliz v promyshlennosti. 2024;24(6):70-78. (In Russ.) https://doi.org/10.18412/1816-0387-2024-6-70-78
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