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Isapour G, Wang A, Han J, Feng Y, Grönbeck H, Creaser D, Olsson L, Skoglundh M, Härelind H. In situ DRIFT studies on N 2O formation over Cu-functionalized zeolites during ammonia-SCR. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00247g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of the zeolite framework structure on the formation of N2O during ammonia-SCR of NOx was studied for three different copper-functionalized zeolite samples, namely Cu-SSZ-13 (CHA), Cu-ZSM-5 (MFI), and Cu-BEA (BEA).
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Affiliation(s)
- Ghodsieh Isapour
- Department of Chemistry and Chemical Engineering, Division of Applied Chemistry Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Aiyong Wang
- Department of Chemistry and Chemical Engineering, Division of Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Joonsoo Han
- Department of Chemistry and Chemical Engineering, Division of Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Yingxin Feng
- Department of Physics, Division of Chemical Physics, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Henrik Grönbeck
- Department of Physics, Division of Chemical Physics, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Derek Creaser
- Department of Chemistry and Chemical Engineering, Division of Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Louise Olsson
- Department of Chemistry and Chemical Engineering, Division of Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Magnus Skoglundh
- Department of Chemistry and Chemical Engineering, Division of Applied Chemistry Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
| | - Hanna Härelind
- Department of Chemistry and Chemical Engineering, Division of Applied Chemistry Competence Centre for Catalysis, Chalmers University of Technology, Gothenburg, Sweden
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Abstract
The isomorphous substitution of Si with metals other than Al in zeotype frameworks allows for tuning the acidity of the zeotype and, therefore, to tailor the catalyst’s properties as a function of the desired catalytic reaction. In this study, B, Ga, and Ti are incorporated in the MFI framework of silicalite samples and the following series of increasing acidity is observed: Ti-silicalite < B-silicalite < Ga-silicalite. It is also observed that the lower the acidity of the sample, the easier the methanol desorption from the zeotype surface. In the target reaction, namely the direct conversion of methane to methanol, methanol extraction is affected by the zeotype acidity. Therefore, the results shown in this study contribute to a more enriched knowledge of this reaction.
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3
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Zhao G, Adesina A, Kennedy E, Stockenhuber M. Formation of Surface Oxygen Species and the Conversion of Methane to Value-Added Products with N2O as Oxidant over Fe-Ferrierite Catalysts. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03466] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Guangyu Zhao
- Chemical Engineering, School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | | | - Eric Kennedy
- Chemical Engineering, School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Michael Stockenhuber
- Chemical Engineering, School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
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