Promotion of Cu/Ce supported red mud for NO removal from low and medium temperature flue gas

LI Yang; XU Bo; YANG He; JIN Lijun; HU Haoquan

doi:10.1016/S1872-5813(23)60388-3

Volume 52 Issue 3

Mar. 2024

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Article Navigation > Journal of Fuel Chemistry and Technology > 2024 > 52(3): 362-372

LI Yang, XU Bo, YANG He, JIN Lijun, HU Haoquan. Promotion of Cu/Ce supported red mud for NO removal from low and medium temperature flue gas[J]. Journal of Fuel Chemistry and Technology, 2024, 52(3): 362-372. doi: 10.1016/S1872-5813(23)60388-3

Citation:

LI Yang, XU Bo, YANG He, JIN Lijun, HU Haoquan. Promotion of Cu/Ce supported red mud for NO removal from low and medium temperature flue gas[J]. Journal of Fuel Chemistry and Technology, 2024, 52(3): 362-372. doi: 10.1016/S1872-5813(23)60388-3

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Promotion of Cu/Ce supported red mud for NO removal from low and medium temperature flue gas

doi: 10.1016/S1872-5813(23)60388-3

State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China

Funds: The project was supported by National Key R&D Program of China (2018YFB0605104), National Natural Science Foundation of China (22278066) and The Fundamental Research Funds for the Central Universities (DUT2021TB03)

Received Date: 2023-05-04
Accepted Date: 2023-06-25
Rev Recd Date: 2023-06-24

Available Online: 2023-10-31

Publish Date: 2024-03-10

Abstract

Abstract

Red mud is a solid waste in aluminum industry and has been proven to be an efficient alternative to NO_x selective catalytic reduction (SCR) catalysts. Acid washing treatment to red mud can improve its alkalinity and surface properties, and increase the conversion rate of NO_x. In this paper, Cu, Ce, and Cu/Ce was supported on acid washed red mud and NO_x catalytic conversion performance on metal modified red mud catalysts was studied. The research results indicate that Cu⁺ and Cu²⁺ in the Cu supported catalyst effectively promote NO conversion rate of red mud in low-temperature (200−300 ℃) flue gas, reaching a maximum of 90.7%; Ce³⁺ and Ce⁴⁺ in Ce supported catalysts effectively promote the NO conversion rate of red mud in flue gas at 200–400 ℃, reaching a maximum of 94.0%; Cu/Ce supporting exhibits better NO conversion rate than single metal supported catalysts at low-temperatures, the optimal Cu∶Ce ratio for supporting is 1∶1; and also exhibits better NO conversion rate than Cu supported catalysts at high-temperature (300−400 ℃), reaching a maximum of 95.5%. The reason may be that under the synergistic effect of Cu/Ce, ACRM-Cu1Ce1 has stronger low-temperature redox ability, higher weak acidic peaks, higher average oxidation state of Fe ions, and higher Cu⁺ content.
- red mud,
- SCR,
- Cu,
- Ce,
- supporting

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References(33)

References

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