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Li Y, Chen D, Xu X, Wang X, Kang R, Fu M, Guo Y, Chen P, Li Y, Ye D. Cold-Start NO x Mitigation by Passive Adsorption Using Pd-Exchanged Zeolites: From Material Design to Mechanism Understanding and System Integration. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:3467-3485. [PMID: 36802541 DOI: 10.1021/acs.est.2c06207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
It remains a major challenge to abate efficiently the harmful nitrogen oxides (NOx) in low-temperature diesel exhausts emitted during the cold-start period of engine operation. Passive NOx adsorbers (PNA), which could temporarily capture NOx at low temperatures (below 200 °C) and release the stored NOx at higher temperatures (normally 250-450 °C) to downstream selective catalytic reduction unit for complete abatement, hold promise to mitigate cold-start NOx emissions. In this review, recent advances in material design, mechanism understanding, and system integration are summarized for PNA based on palladium-exchanged zeolites. First, we discuss the choices of parent zeolite, Pd precursor, and synthetic method for the synthesis of Pd-zeolites with atomic Pd dispersions, and review the effect of hydrothermal aging on the properties and PNA performance of Pd-zeolites. Then, we show how different experimental and theoretical methodologies can be integrated to gain mechanistic insights into the nature of Pd active sites, the NOx storage/release chemistry, as well as the interactions between Pd and typical components/poisons in engine exhausts. This review also gathers several novel designs of PNA integration into modern exhaust after-treatment systems for practical application. At the end, we discuss the major challenges, as well as important implications, for the further development and real application of Pd-zeolite-based PNA in cold-start NOx mitigation.
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Affiliation(s)
- Ying Li
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Dongdong Chen
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Xin Xu
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Xinyu Wang
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Running Kang
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland
| | - Mingli Fu
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Yanbing Guo
- Institute of Environmental and Applied Chemistry, College of Chemistry, Central China Normal University, 430079 Wuhan, China
| | - Peirong Chen
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
| | - Yongdan Li
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, 02150 Espoo, Finland
| | - Daiqi Ye
- National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006 Guangzhou, China
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Wang Y, Chen SL, Gao YL, Cao YQ, Zhang Q, Chang WK, Benziger JB. Enhanced Methanol to Olefin Catalysis by Physical Mixtures of SAPO-34 Molecular Sieve and MgO. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01285] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ya Wang
- State
Key Laboratory of Heavy Oil Processing and Department of Chemical
Engineering, China University of Petroleum, Beijing, 102249, People’s Republic of China
| | - Sheng-Li Chen
- State
Key Laboratory of Heavy Oil Processing and Department of Chemical
Engineering, China University of Petroleum, Beijing, 102249, People’s Republic of China
| | - Yu-Li Gao
- State
Key Laboratory of Heavy Oil Processing and Department of Chemical
Engineering, China University of Petroleum, Beijing, 102249, People’s Republic of China
| | - Ying-Qian Cao
- State
Key Laboratory of Heavy Oil Processing and Department of Chemical
Engineering, China University of Petroleum, Beijing, 102249, People’s Republic of China
| | - Qi Zhang
- State
Key Laboratory of Heavy Oil Processing and Department of Chemical
Engineering, China University of Petroleum, Beijing, 102249, People’s Republic of China
| | - Wei-Ke Chang
- State
Key Laboratory of Heavy Oil Processing and Department of Chemical
Engineering, China University of Petroleum, Beijing, 102249, People’s Republic of China
| | - Jay B. Benziger
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
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García-Ricard OJ, Arévalo-Hidalgo AG, Yu M, Almodóvar-Arbelo NE, Varghese M, Mulloth L, Luna B, Hernández-Maldonado AJ. Removal of Carbon Dioxide from Light Gas Mixtures using a Porous Strontium(II) Silicoaluminophosphate Fixed Bed: Closed Volume and Portable Applications. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2013.862279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Fischer M, Bell RG. Cation-exchanged SAPO-34 for adsorption-based hydrocarbon separations: predictions from dispersion-corrected DFT calculations. Phys Chem Chem Phys 2014; 16:21062-72. [DOI: 10.1039/c4cp01049c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interaction of C2 and C3 hydrocarbons with cation-exchanged SAPO-34 materials is studied using DFT-D calculations, permitting predictions regarding their suitability for alkene–alkane separations.
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Affiliation(s)
- Michael Fischer
- Department of Chemistry
- University College London
- London WC1H 0AJ, UK
| | - Robert G. Bell
- Department of Chemistry
- University College London
- London WC1H 0AJ, UK
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Valtchev V, Majano G, Mintova S, Pérez-Ramírez J. Tailored crystalline microporous materials by post-synthesis modification. Chem Soc Rev 2013; 42:263-90. [DOI: 10.1039/c2cs35196j] [Citation(s) in RCA: 342] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Arévalo-Hidalgo AG, Dugar S, Fu R, Hernández-Maldonado AJ. 1H and 23Na MAS NMR spectroscopy of cationic species in CO2 selective alkaline earth metal porous silicoaluminophosphates prepared via liquid and solid state ion exchange. J SOLID STATE CHEM 2012. [DOI: 10.1016/j.jssc.2012.03.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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