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Title: NH 3-SCR on Cu, Fe and Cu + Fe exchanged beta and SSZ-13 catalysts: Hydrothermal aging and propylene poisoning effects

Abstract

Cu, Fe and Cu + Fe ion exchanged Beta and SSZ-13 catalysts were prepared by solution ion exchange using commercial NH 4/Beta, and NH 4/SSZ-13 that was prepared in-house. To study hydrothermal aging effects, Beta supported catalysts were aged hydrothermally at 700 °C and SSZ-13 supported catalysts were aged at 750 °C. In order to reveal the effects of Fe addition in the co-exchanged catalysts, these catalysts were characterized by means of powder X-ray diffraction (XRD), N 2 adsorption-desorption, electron paramagnetic resonance (EPR), 27Al-nuclear magnetic resonance ( 27Al-NMR) and propylene coking followed with temperature programmed reaction (TPR), and further tested with standard NH 3-SCR with and without the presence of propylene. Collectively, the catalyst characterizations and reaction testing indicated minor beneficial effects of Fe addition in Cu,Fe/Beta, where NH 3-SCR activity, N 2 selectivity and hydrothermal stability were all slightly improved. In contrast, Fe addition did not show apparent beneficial effects in low-temperature SCR for the Cu,Fe/SSZ-13 case. In conclusion, at elevated reaction temperatures, however, the presence of Fe indeed considerably improved NO conversion and N 2 selectivity for the hydrothermally aged Cu,Fe/SSZ-13 catalyst in the presence of propylene.

Authors:
 [1];  [2];  [2];  [2];  [3];  [3];  [2];  [2]
  1. East China Univ. of Science of Technology, Shanghai (China); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. East China Univ. of Science of Technology, Shanghai (China)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1413492
Report Number(s):
PNNL-SA-128427
Journal ID: ISSN 0920-5861; PII: S0920586117306764; TRN: US1800438
Grant/Contract Number:
AC05-76RL01830
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Catalysis Today
Additional Journal Information:
Journal Name: Catalysis Today; Journal ID: ISSN 0920-5861
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; NH3-SCR; Cu; Fe; Beta; SSZ-13

Citation Formats

Wang, Aiyong, Wang, Yilin, Walter, Eric D., Washton, Nancy M., Guo, Yanglong, Lu, Guanzhong, Peden, Charles H. F., and Gao, Feng. NH3-SCR on Cu, Fe and Cu + Fe exchanged beta and SSZ-13 catalysts: Hydrothermal aging and propylene poisoning effects. United States: N. p., 2017. Web. doi:10.1016/J.CATTOD.2017.09.061.
Wang, Aiyong, Wang, Yilin, Walter, Eric D., Washton, Nancy M., Guo, Yanglong, Lu, Guanzhong, Peden, Charles H. F., & Gao, Feng. NH3-SCR on Cu, Fe and Cu + Fe exchanged beta and SSZ-13 catalysts: Hydrothermal aging and propylene poisoning effects. United States. doi:10.1016/J.CATTOD.2017.09.061.
Wang, Aiyong, Wang, Yilin, Walter, Eric D., Washton, Nancy M., Guo, Yanglong, Lu, Guanzhong, Peden, Charles H. F., and Gao, Feng. Sat . "NH3-SCR on Cu, Fe and Cu + Fe exchanged beta and SSZ-13 catalysts: Hydrothermal aging and propylene poisoning effects". United States. doi:10.1016/J.CATTOD.2017.09.061.
@article{osti_1413492,
title = {NH3-SCR on Cu, Fe and Cu + Fe exchanged beta and SSZ-13 catalysts: Hydrothermal aging and propylene poisoning effects},
author = {Wang, Aiyong and Wang, Yilin and Walter, Eric D. and Washton, Nancy M. and Guo, Yanglong and Lu, Guanzhong and Peden, Charles H. F. and Gao, Feng},
abstractNote = {Cu, Fe and Cu + Fe ion exchanged Beta and SSZ-13 catalysts were prepared by solution ion exchange using commercial NH4/Beta, and NH4/SSZ-13 that was prepared in-house. To study hydrothermal aging effects, Beta supported catalysts were aged hydrothermally at 700 °C and SSZ-13 supported catalysts were aged at 750 °C. In order to reveal the effects of Fe addition in the co-exchanged catalysts, these catalysts were characterized by means of powder X-ray diffraction (XRD), N2 adsorption-desorption, electron paramagnetic resonance (EPR), 27Al-nuclear magnetic resonance (27Al-NMR) and propylene coking followed with temperature programmed reaction (TPR), and further tested with standard NH3-SCR with and without the presence of propylene. Collectively, the catalyst characterizations and reaction testing indicated minor beneficial effects of Fe addition in Cu,Fe/Beta, where NH3-SCR activity, N2 selectivity and hydrothermal stability were all slightly improved. In contrast, Fe addition did not show apparent beneficial effects in low-temperature SCR for the Cu,Fe/SSZ-13 case. In conclusion, at elevated reaction temperatures, however, the presence of Fe indeed considerably improved NO conversion and N2 selectivity for the hydrothermally aged Cu,Fe/SSZ-13 catalyst in the presence of propylene.},
doi = {10.1016/J.CATTOD.2017.09.061},
journal = {Catalysis Today},
number = ,
volume = ,
place = {United States},
year = {Sat Oct 07 00:00:00 EDT 2017},
month = {Sat Oct 07 00:00:00 EDT 2017}
}

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