Irregular influence of alkali metals on Cu-SAPO-34 catalyst for selective catalytic reduction of NOx with ammonia
Само за регистроване кориснике
2020
Аутори
Yang, GuangpengDu, Xuesen
Ran, Jingyu
Wang, Xiangmin
Chen, Yanrong
Zhang, Li
Rac, Vladislav
Rakić, Vesna
Crittenden, John
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
SCR activity of Cu-SAPO-34 catalyst was reduced by alkali metal ions. The alkali metals ions (Li+, Na+ and K+) have shown irregular influences on Cu-SAPO-34. The order of poisoning strengths under 400 degrees C was found to be: Na+ > K+ Li+, which is not consistent with the basicities of their corresponding metals. Experimental results and calculations showed that the alkali metal ions readily replace H+ and Cu2+/Cu3+ ions. These exchanges result in the loss of Bronsted acid sites and migration of isolated Cu2+ ions in Cu-SAPO-34, which decrease the NH3-SCR activity. Both the basicity and ion diameter will affect the exchanging behavior of an alkali ion. Na+ and Li+ ions will influence both H+ and Cu2+/Cu+ ions but K+ ions only preferably replace the H+ We hypothesize that K+ cannot enter into a small ring (6-membered ring) to replace a Cu2+/Cu+ ion because of its large ion diameter. The displaced Cu2+/Cu+ ions will transfer to adjacent unbonded Al site to form a CuAlO2 species.
Кључне речи:
Cu-SAPO-34 / Alkali metal / Migration / Cu speciesИзвор:
Journal of Hazardous Materials, 2020, 387Издавач:
- Elsevier, Amsterdam
Финансирање / пројекти:
- National Natural Science Foundation of China (NSFC) [51506015]
- Chongqing Technology Innovation and Application Demonstration Projects [cstc2018jscx-msyb0999]
- Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [2018CDQYDL0050, 2018CDJDDL0004]
- Open Fund of Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education of China [LLEUTS-2019002]
- Brook Byers Institute for Sustainable Systems, Hightower Chair and Georgia Research Alliance at the Georgia Institute of Technology
DOI: 10.1016/j.jhazmat.2019.122007
ISSN: 0304-3894
PubMed: 31901842
WoS: 000514758500014
Scopus: 2-s2.0-85078692506
Институција/група
Poljoprivredni fakultetTY - JOUR AU - Yang, Guangpeng AU - Du, Xuesen AU - Ran, Jingyu AU - Wang, Xiangmin AU - Chen, Yanrong AU - Zhang, Li AU - Rac, Vladislav AU - Rakić, Vesna AU - Crittenden, John PY - 2020 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/5346 AB - SCR activity of Cu-SAPO-34 catalyst was reduced by alkali metal ions. The alkali metals ions (Li+, Na+ and K+) have shown irregular influences on Cu-SAPO-34. The order of poisoning strengths under 400 degrees C was found to be: Na+ > K+ Li+, which is not consistent with the basicities of their corresponding metals. Experimental results and calculations showed that the alkali metal ions readily replace H+ and Cu2+/Cu3+ ions. These exchanges result in the loss of Bronsted acid sites and migration of isolated Cu2+ ions in Cu-SAPO-34, which decrease the NH3-SCR activity. Both the basicity and ion diameter will affect the exchanging behavior of an alkali ion. Na+ and Li+ ions will influence both H+ and Cu2+/Cu+ ions but K+ ions only preferably replace the H+ We hypothesize that K+ cannot enter into a small ring (6-membered ring) to replace a Cu2+/Cu+ ion because of its large ion diameter. The displaced Cu2+/Cu+ ions will transfer to adjacent unbonded Al site to form a CuAlO2 species. PB - Elsevier, Amsterdam T2 - Journal of Hazardous Materials T1 - Irregular influence of alkali metals on Cu-SAPO-34 catalyst for selective catalytic reduction of NOx with ammonia VL - 387 DO - 10.1016/j.jhazmat.2019.122007 ER -
@article{ author = "Yang, Guangpeng and Du, Xuesen and Ran, Jingyu and Wang, Xiangmin and Chen, Yanrong and Zhang, Li and Rac, Vladislav and Rakić, Vesna and Crittenden, John", year = "2020", abstract = "SCR activity of Cu-SAPO-34 catalyst was reduced by alkali metal ions. The alkali metals ions (Li+, Na+ and K+) have shown irregular influences on Cu-SAPO-34. The order of poisoning strengths under 400 degrees C was found to be: Na+ > K+ Li+, which is not consistent with the basicities of their corresponding metals. Experimental results and calculations showed that the alkali metal ions readily replace H+ and Cu2+/Cu3+ ions. These exchanges result in the loss of Bronsted acid sites and migration of isolated Cu2+ ions in Cu-SAPO-34, which decrease the NH3-SCR activity. Both the basicity and ion diameter will affect the exchanging behavior of an alkali ion. Na+ and Li+ ions will influence both H+ and Cu2+/Cu+ ions but K+ ions only preferably replace the H+ We hypothesize that K+ cannot enter into a small ring (6-membered ring) to replace a Cu2+/Cu+ ion because of its large ion diameter. The displaced Cu2+/Cu+ ions will transfer to adjacent unbonded Al site to form a CuAlO2 species.", publisher = "Elsevier, Amsterdam", journal = "Journal of Hazardous Materials", title = "Irregular influence of alkali metals on Cu-SAPO-34 catalyst for selective catalytic reduction of NOx with ammonia", volume = "387", doi = "10.1016/j.jhazmat.2019.122007" }
Yang, G., Du, X., Ran, J., Wang, X., Chen, Y., Zhang, L., Rac, V., Rakić, V.,& Crittenden, J.. (2020). Irregular influence of alkali metals on Cu-SAPO-34 catalyst for selective catalytic reduction of NOx with ammonia. in Journal of Hazardous Materials Elsevier, Amsterdam., 387. https://doi.org/10.1016/j.jhazmat.2019.122007
Yang G, Du X, Ran J, Wang X, Chen Y, Zhang L, Rac V, Rakić V, Crittenden J. Irregular influence of alkali metals on Cu-SAPO-34 catalyst for selective catalytic reduction of NOx with ammonia. in Journal of Hazardous Materials. 2020;387. doi:10.1016/j.jhazmat.2019.122007 .
Yang, Guangpeng, Du, Xuesen, Ran, Jingyu, Wang, Xiangmin, Chen, Yanrong, Zhang, Li, Rac, Vladislav, Rakić, Vesna, Crittenden, John, "Irregular influence of alkali metals on Cu-SAPO-34 catalyst for selective catalytic reduction of NOx with ammonia" in Journal of Hazardous Materials, 387 (2020), https://doi.org/10.1016/j.jhazmat.2019.122007 . .