The Study of C<sub>3</sub>H<sub>6</sub> Impact on Selective Catalytic Reduction by Ammonia (NH<sub>3</sub>-SCR) Performance over Cu-SAPO-34 Catalysts
In present work, the catalytic performance of Cu-SAPO-34 catalysts with or without propylene during the NH<sub>3</sub>-SCR process was conducted, and it was found that the de-NO<sub>x</sub> activity decreased during low temperature ranges (<350 °C), but obviously improved...
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2021
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oai:doaj.org-article:057fac89ca0742fe8b4467b0dc98ffd32021-11-25T17:05:55ZThe Study of C<sub>3</sub>H<sub>6</sub> Impact on Selective Catalytic Reduction by Ammonia (NH<sub>3</sub>-SCR) Performance over Cu-SAPO-34 Catalysts10.3390/catal111113272073-4344https://doaj.org/article/057fac89ca0742fe8b4467b0dc98ffd32021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1327https://doaj.org/toc/2073-4344In present work, the catalytic performance of Cu-SAPO-34 catalysts with or without propylene during the NH<sub>3</sub>-SCR process was conducted, and it was found that the de-NO<sub>x</sub> activity decreased during low temperature ranges (<350 °C), but obviously improved within the range of high temperatures (>350 °C) in the presence of propylene. The XRD, BET, TG, NH<sub>3</sub>-TPD, NO<sub>x</sub>-TPD, in situ DRIFTS and gas-switch experiments were performed to explore the propylene effect on the structure and performance of Cu-SAPO-34 catalysts. The bulk characterization and TG results revealed that neither coke deposition nor the variation of structure and physical properties of catalysts were observed after C<sub>3</sub>H<sub>6</sub> treatment. Generally speaking, at the low temperatures (<350 °C), active Cu<sup>2+</sup> species could be occupied by propylene, which inhibited the adsorption and oxidation of NO<sub>x</sub> species, confining the SCR reaction rate and causing the deactivation of Cu-SAPO-34 catalysts. However, with the increase of reaction temperatures, the occupied Cu<sup>2+</sup> sites would be recovered and sequentially participate into the NH<sub>3</sub>-SCR reaction. Additionally, C<sub>3</sub>H<sub>6</sub>-SCR reaction also showed the synergetic contribution to the improvement of NO<sub>x</sub> conversion at high temperature (>350 °C).Yingfeng DuanLina WangYagang ZhangWei DuYating ZhangMDPI AGarticleNH<sub>3</sub>-SCRC<sub>3</sub>H<sub>6</sub> impactCu-SAPO-34NO<sub>x</sub> abatementmechanismChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1327, p 1327 (2021) |
| institution |
DOAJ |
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DOAJ |
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EN |
| topic |
NH<sub>3</sub>-SCR C<sub>3</sub>H<sub>6</sub> impact Cu-SAPO-34 NO<sub>x</sub> abatement mechanism Chemical technology TP1-1185 Chemistry QD1-999 |
| spellingShingle |
NH<sub>3</sub>-SCR C<sub>3</sub>H<sub>6</sub> impact Cu-SAPO-34 NO<sub>x</sub> abatement mechanism Chemical technology TP1-1185 Chemistry QD1-999 Yingfeng Duan Lina Wang Yagang Zhang Wei Du Yating Zhang The Study of C<sub>3</sub>H<sub>6</sub> Impact on Selective Catalytic Reduction by Ammonia (NH<sub>3</sub>-SCR) Performance over Cu-SAPO-34 Catalysts |
| description |
In present work, the catalytic performance of Cu-SAPO-34 catalysts with or without propylene during the NH<sub>3</sub>-SCR process was conducted, and it was found that the de-NO<sub>x</sub> activity decreased during low temperature ranges (<350 °C), but obviously improved within the range of high temperatures (>350 °C) in the presence of propylene. The XRD, BET, TG, NH<sub>3</sub>-TPD, NO<sub>x</sub>-TPD, in situ DRIFTS and gas-switch experiments were performed to explore the propylene effect on the structure and performance of Cu-SAPO-34 catalysts. The bulk characterization and TG results revealed that neither coke deposition nor the variation of structure and physical properties of catalysts were observed after C<sub>3</sub>H<sub>6</sub> treatment. Generally speaking, at the low temperatures (<350 °C), active Cu<sup>2+</sup> species could be occupied by propylene, which inhibited the adsorption and oxidation of NO<sub>x</sub> species, confining the SCR reaction rate and causing the deactivation of Cu-SAPO-34 catalysts. However, with the increase of reaction temperatures, the occupied Cu<sup>2+</sup> sites would be recovered and sequentially participate into the NH<sub>3</sub>-SCR reaction. Additionally, C<sub>3</sub>H<sub>6</sub>-SCR reaction also showed the synergetic contribution to the improvement of NO<sub>x</sub> conversion at high temperature (>350 °C). |
| format |
article |
| author |
Yingfeng Duan Lina Wang Yagang Zhang Wei Du Yating Zhang |
| author_facet |
Yingfeng Duan Lina Wang Yagang Zhang Wei Du Yating Zhang |
| author_sort |
Yingfeng Duan |
| title |
The Study of C<sub>3</sub>H<sub>6</sub> Impact on Selective Catalytic Reduction by Ammonia (NH<sub>3</sub>-SCR) Performance over Cu-SAPO-34 Catalysts |
| title_short |
The Study of C<sub>3</sub>H<sub>6</sub> Impact on Selective Catalytic Reduction by Ammonia (NH<sub>3</sub>-SCR) Performance over Cu-SAPO-34 Catalysts |
| title_full |
The Study of C<sub>3</sub>H<sub>6</sub> Impact on Selective Catalytic Reduction by Ammonia (NH<sub>3</sub>-SCR) Performance over Cu-SAPO-34 Catalysts |
| title_fullStr |
The Study of C<sub>3</sub>H<sub>6</sub> Impact on Selective Catalytic Reduction by Ammonia (NH<sub>3</sub>-SCR) Performance over Cu-SAPO-34 Catalysts |
| title_full_unstemmed |
The Study of C<sub>3</sub>H<sub>6</sub> Impact on Selective Catalytic Reduction by Ammonia (NH<sub>3</sub>-SCR) Performance over Cu-SAPO-34 Catalysts |
| title_sort |
study of c<sub>3</sub>h<sub>6</sub> impact on selective catalytic reduction by ammonia (nh<sub>3</sub>-scr) performance over cu-sapo-34 catalysts |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/057fac89ca0742fe8b4467b0dc98ffd3 |
| work_keys_str_mv |
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| _version_ |
1718412692289486848 |