TY  - JOUR
AU  - Nie, Hua
AU  - Li, Wei
AU  - Wu, Qirong
AU  - Rac, Vladislav
AU  - Rakić, Vesna
AU  - Du, Xuesen
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5343
AB  - Poisoning effects by alkali metal chlorides is one of the major reasons for the deactivation of SCR catalyst in biomass-fired plants. In this study, the influence of KCl on two vanadium-based catalysts with different promoters, V2O5-WO3/TiO2 and V2O5-Ce(SO4)(2)/TiO2, was investigated. The catalytic activity of the fresh V2O5-WO3/TiO2 was higher than that of V2O5-Ce(SO4)(2)/TiO2 at low temperatures. V2O5-Ce(SO4)(2)/TiO2 performed better than V2O5-WO3/TiO2 when KCl was deposited on the catalyst surface. Both poisoned catalysts were efficiently regenerated by SO2 treatment. The characterization results show that the reducibility and acidity of the catalysts were weakened by KCl deposition but regenerated by SO2.
PB  - MDPI, BASEL
T2  - Catalysts
T1  - The Poisoning of V2O5-WO3/TiO2 and V2O5-Ce(SO4)(2)/TiO2 SCR Catalysts by KCl and The Partial Regeneration by SO2
IS  - 2
VL  - 10
DO  - 10.3390/catal10020207
ER  - 

@article{
author = "Nie, Hua and Li, Wei and Wu, Qirong and Rac, Vladislav and Rakić, Vesna and Du, Xuesen",
year = "2020",
abstract = "Poisoning effects by alkali metal chlorides is one of the major reasons for the deactivation of SCR catalyst in biomass-fired plants. In this study, the influence of KCl on two vanadium-based catalysts with different promoters, V2O5-WO3/TiO2 and V2O5-Ce(SO4)(2)/TiO2, was investigated. The catalytic activity of the fresh V2O5-WO3/TiO2 was higher than that of V2O5-Ce(SO4)(2)/TiO2 at low temperatures. V2O5-Ce(SO4)(2)/TiO2 performed better than V2O5-WO3/TiO2 when KCl was deposited on the catalyst surface. Both poisoned catalysts were efficiently regenerated by SO2 treatment. The characterization results show that the reducibility and acidity of the catalysts were weakened by KCl deposition but regenerated by SO2.",
publisher = "MDPI, BASEL",
journal = "Catalysts",
title = "The Poisoning of V2O5-WO3/TiO2 and V2O5-Ce(SO4)(2)/TiO2 SCR Catalysts by KCl and The Partial Regeneration by SO2",
number = "2",
volume = "10",
doi = "10.3390/catal10020207"
}

Nie, H., Li, W., Wu, Q., Rac, V., Rakić, V.,& Du, X.. (2020). The Poisoning of V2O5-WO3/TiO2 and V2O5-Ce(SO4)(2)/TiO2 SCR Catalysts by KCl and The Partial Regeneration by SO2. in Catalysts
MDPI, BASEL., 10(2).
https://doi.org/10.3390/catal10020207

Nie H, Li W, Wu Q, Rac V, Rakić V, Du X. The Poisoning of V2O5-WO3/TiO2 and V2O5-Ce(SO4)(2)/TiO2 SCR Catalysts by KCl and The Partial Regeneration by SO2. in Catalysts. 2020;10(2).
doi:10.3390/catal10020207 .

Nie, Hua, Li, Wei, Wu, Qirong, Rac, Vladislav, Rakić, Vesna, Du, Xuesen, "The Poisoning of V2O5-WO3/TiO2 and V2O5-Ce(SO4)(2)/TiO2 SCR Catalysts by KCl and The Partial Regeneration by SO2" in Catalysts, 10, no. 2 (2020),
https://doi.org/10.3390/catal10020207 . .

TY  - 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 . .