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Khatri P, Bhatia D. Effect of
H
2
,
H
2
O
, and
CO
2
on the
deNO
x
characteristics of a combined passive
NO
x
adsorber and
NO
x
reduction catalyst. AIChE J 2022. [DOI: 10.1002/aic.17675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Prateek Khatri
- Department of Chemical Engineering Indian Institute of Technology Delhi New Delhi India
| | - Divesh Bhatia
- Department of Chemical Engineering Indian Institute of Technology Delhi New Delhi India
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Pace R, Lardinois TM, Ji Y, Gounder R, Heintz O, Crocker M. Effects of Treatment Conditions on Pd Speciation in CHA and Beta Zeolites for Passive NO x Adsorption. ACS OMEGA 2021; 6:29471-29482. [PMID: 34778619 PMCID: PMC8581994 DOI: 10.1021/acsomega.1c03440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 10/12/2021] [Indexed: 05/14/2023]
Abstract
The structure and evolution of Pd species in Pd-exchanged zeolite materials intended for use as passive NO x adsorbers were examined under various pretreatment conditions. Using in situ CO-diffuse reflectance infrared spectroscopy, Pd structures were characterized after 500 °C pretreatments in inert (Ar), water (1-2% H2O in Ar), oxidizing (air), and reducing (H2, CO) atmospheres. Two zeolites of similar Si/Al ratios but different framework topologies (Beta, CHA) were found to show different distributions of Pd species, depending on the reducing agent used. Reduction in H2 (500 °C; 10% H2 in Ar) followed by re-oxidation (500 °C; air) led to higher amounts of single-site Pd ions on Pd-CHA than Pd-Beta, whereas high-temperature reduction in CO (500 °C; 1000 ppm CO in Ar) followed by re-oxidation (500 °C; air) led to significant loss of ionic Pd on both Pd-CHA and Pd-Beta, albeit H2 temperature-programmed reduction and XPS experiments suggest that this phenomena may be limited to surface Pd. High-temperature treatments with water (500 °C; 1-2% H2O in Ar) are shown to form either Pd metal or PdO particles, with Pd-Beta being more susceptible to these effects than Pd-CHA. This work suggests that the effects of CO are especially problematic with respect to the durability of these materials in passive NO x adsorption applications, especially in the case of Beta zeolite.
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Affiliation(s)
- Robert
B. Pace
- Center
for Applied Energy Research, University
of Kentucky, 2540 Research Park Drive, Lexington, Kentucky 0511, United States
- Department
of Chemistry, University of Kentucky, 161 Jacobs Science Building, Lexington, Kentucky 40506, United States
| | - Trevor M. Lardinois
- Charles
D. Davidson School of Chemical Engineering, Purdue University, 701 W Stadium Ave. #3000, West Lafayette, Indiana 47907, United States
| | - Yaying Ji
- Center
for Applied Energy Research, University
of Kentucky, 2540 Research Park Drive, Lexington, Kentucky 0511, United States
| | - Rajamani Gounder
- Charles
D. Davidson School of Chemical Engineering, Purdue University, 701 W Stadium Ave. #3000, West Lafayette, Indiana 47907, United States
| | - Olivier Heintz
- Laboratoire
Interdisciplinaire Carnot de Bourgogne (LICB), UMR CNRS 6303, Université
de BourgogneFranche-Comté, 9 Avenue Alain Savary, 21078 Dijon Cedex, France
| | - Mark Crocker
- Center
for Applied Energy Research, University
of Kentucky, 2540 Research Park Drive, Lexington, Kentucky 0511, United States
- Department
of Chemistry, University of Kentucky, 161 Jacobs Science Building, Lexington, Kentucky 40506, United States
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3
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Performance and Mechanistic Aspects of Ag/MgO/$${\varvec{\gamma}}$$-Al2O3 as a Passive NOx Adsorber. Catal Letters 2021. [DOI: 10.1007/s10562-021-03565-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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4
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Wang A, Xie K, Kumar A, Kamasamudram K, Olsson L. Layered Pd/SSZ-13 with Cu/SSZ-13 as PNA − SCR dual-layer monolith catalyst for NOx abatement. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.01.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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5
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Castoldi L, Matarrese R, Morandi S, Ticali P, Lietti L. Low-temperature Pd/FER NOx adsorbers: Operando FT-IR spectroscopy and performance analysis. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.02.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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6
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Recent advances in catalytic automotive emission control: Passive
NO
storage at low temperatures. J CHIN CHEM SOC-TAIP 2020. [DOI: 10.1002/jccs.202000203] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ilmasani RF, Woo J, Creaser D, Olsson L. Influencing the NOx Stability by Metal Oxide Addition to Pd/BEA for Passive NOx Adsorbers. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06976] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rojin Feizie Ilmasani
- Department of Chemistry and Chemical Engineering, Competence Center for Catalysis, Chalmers University of Technology, Göteborg SE-412 96, Sweden
| | - Jungwon Woo
- Department of Chemistry and Chemical Engineering, Competence Center for Catalysis, Chalmers University of Technology, Göteborg SE-412 96, Sweden
| | - Derek Creaser
- Department of Chemistry and Chemical Engineering, Competence Center for Catalysis, Chalmers University of Technology, Göteborg SE-412 96, Sweden
| | - Louise Olsson
- Department of Chemistry and Chemical Engineering, Competence Center for Catalysis, Chalmers University of Technology, Göteborg SE-412 96, Sweden
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Selective catalytic reduction of NOx with ethanol and other C1–4 oxygenates over Ag/Al2O3 catalysts: A review. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-019-1847-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Mihai O, Trandafilović L, Wentworth T, Torres FF, Olsson L. The Effect of Si/Al Ratio for Pd/BEA and Pd/SSZ-13 Used as Passive NOx Adsorbers. Top Catal 2018. [DOI: 10.1007/s11244-018-1017-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Ji Y, Xu D, Bai S, Graham U, Crocker M, Chen B, Shi C, Harris D, Scapens D, Darab J. Pt- and Pd-Promoted CeO2–ZrO2 for Passive NOx Adsorber Applications. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b03793] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yaying Ji
- Center
for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Dongyan Xu
- Center
for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Shuli Bai
- Center
for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Uschi Graham
- Center
for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Mark Crocker
- Center
for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
- Department
of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Bingbing Chen
- Dalian University of Technology, Dalian, CN 116024, P. R. China
| | - Chuan Shi
- Dalian University of Technology, Dalian, CN 116024, P. R. China
| | - Deb Harris
- MEL Chemicals, Manchester, M27 8LS, United Kingdom
| | - Dave Scapens
- MEL Chemicals, Manchester, M27 8LS, United Kingdom
| | - John Darab
- MEL Chemicals
Inc., Flemington, New Jersey 08822, United States
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12
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Stakheev AY, Mashkovsky IS, Bragina GO, Baeva GN, Telegina NS, Malmstrøm Larsen K, Kustov AL, Thøgersen JR. Mechanism of Low-Temperature NOx Storage for Reducing NOx Cold Start Emission. Top Catal 2016. [DOI: 10.1007/s11244-016-0571-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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