التفاصيل البيبلوغرافية
| العنوان: |
Modeling of a Two-Bed Reactor for Low-Temperature Removal of Nitrogen Oxides in Nitric Acid Production. |
| المؤلفون: |
Vernikovskaya, Nadezhda, Ivanova, Yuliya, Sheboltasov, Artem, Chumachenko, Victor, Isupova, Lyubov |
| المصدر: |
Catalysts (2073-4344); Mar2023, Vol. 13 Issue 3, p535, 15p |
| مصطلحات موضوعية: |
NITROGEN oxides, NITROGEN oxides emission control, NITRIC acid, NITRIC oxide, ISOTHERMAL flows |
| مستخلص: |
In this study, the modeling of the low-temperature catalytic abatement of NOX and N2O from tail gases in a weak nitric acid plant utilizing a single-pressure 0.716 MPa system was performed. A one-reactor concept assumes that in the first bed, NOX is reduced by ammonia on a commercial vanadia–alumina catalyst, and in the second bed, N2O is decomposed on a proprietary nickel–cobalt catalyst. The kinetics of N2O decomposition on a Cs/Ni0.1Co2.9O4 catalyst was experimentally studied in an isothermal flow reactor. The reaction rate constants were determined by varying the residence time and temperature; these data formed the basis for modeling kinetics and heat and mass transport in an adiabatic reactor in which the low-temperature mitigation of nitrogen oxides occurred. Taking into account the given spatial limitations inside the reactor and the allowable temperatures, the layer heights were evaluated to ensure a residual NOX and N2O content of less than 50 ppm. Catalyst loading using layers in a commercial reactor was estimated for the tail-gas flow rates of 46,040–58,670 m3/h. Simulations showed that the optimum inlet temperature was 260 °C; in this case, the NOX and N2O conversion targets were achieved in the range of 46,040–58,670 m3/h while adhering to catalyst bed height and outlet temperature limitations. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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