Modeling of a Two-Bed Reactor for Low-Temperature Removal of Nitrogen Oxides in Nitric Acid Production Full article
| Journal |
Catalysts
ISSN: 2073-4344 |
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| Output data | Year: 2023, Volume: 13, Article number : 535, Pages count : 15 DOI: 10.3390/catal13030535 | ||
| Tags | Cs/Ni0.1Co2.9O4 catalyst; de-N2O; one-reactor concept; kinetic modeling; mathematical modeling | ||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0004 |
| 2 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0014 |
Abstract:
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.
Cite:
Vernikovskaya N.
, Ivanova Y.
, Sheboltasov A.
, Chumachenko V.
, Isupova L.
Modeling of a Two-Bed Reactor for Low-Temperature Removal of Nitrogen Oxides in Nitric Acid Production
Catalysts. 2023. V.13. 535 :1-15. DOI: 10.3390/catal13030535 WOS Scopus РИНЦ AN OpenAlex
Modeling of a Two-Bed Reactor for Low-Temperature Removal of Nitrogen Oxides in Nitric Acid Production
Catalysts. 2023. V.13. 535 :1-15. DOI: 10.3390/catal13030535 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Jan 23, 2023 |
| Accepted: | Mar 2, 2023 |
| Published print: | Mar 6, 2023 |
| Published online: | Mar 6, 2023 |
Identifiers:
| Web of science: | WOS:000959573900001 |
| Scopus: | 2-s2.0-85151472353 |
| Elibrary: | 54911160 |
| Chemical Abstracts: | 2023:684274 |
| OpenAlex: | W4323365058 |