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An integrated approach to the key parameters in methanol-to-olefins reaction catalyzed by MFI/MEL zeolite materials

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Title: An integrated approach to the key parameters in methanol-to-olefins reaction catalyzed by MFI/MEL zeolite materials
Authors: Liu, C. (author), Uslamin, E. (author), van Vreeswijk, Sophie H. (author), Yarulina, Irina (author), Ganapathy, S. (author), Weckhuysen, Bert M. (author), Kapteijn, F. (author), Pidko, E.A. (author)
Source: Chinese Journal of Catalysis. 43:1879-1893
Publisher Information: Elsevier BV, 2022.
Publication Year: 2022
Subject Terms: Structure-performance relationship, Acidity, the Netherlands, 02 engineering and technology, 01 natural sciences, Intergrowth MFI, MEL, 0104 chemical sciences, Methanol-to-olefin conversion, Pentasil, Zeolite catalysis, Al-distribution, 0210 nano-technology, Intergrowth MFI/MEL
Description: Identification of the catalyst characteristics correlating with the key performance parameters including selectivity and stability is key to the rational catalyst design. Herein we focused on the identification of property-performance relationships in the methanol-to-olefin (MTO) process by studying in detail the catalytic behaviour of MFI, MEL and their respective intergrowth zeolites. The detailed material characterization reveals that both the high production of propylene and butylenes and the large MeOH conversion capacity correlate with the enrichment of lattice Al sites in the channels of the pentasil structure as identified by 27Al MAS NMR and 3-methylpentane cracking results. The lack of correlation between MTO performance and other catalyst characteristics, such as crystal size, presence of external Brønsted acid sites and Al pairing suggests their less pronounced role in defining the propylene selectivity. Our analysis reveals that catalyst deactivation is rather complex and is strongly affected by the enrichment of lattice Al in the intersections, the overall Al-content, and crystal size. The intergrowth of MFI and MEL phases accelerates the catalyst deactivation rate.
Document Type: Article
Language: English
ISSN: 1872-2067
DOI: 10.1016/s1872-2067(21)63990-6
Access URL: http://resolver.tudelft.nl/uuid:2c18f1f5-0fac-48f5-9e45-0d760e225ab5
Rights: Elsevier TDM
taverne
Accession Number: edsair.doi.dedup.....c0e70dbffd663cac6922fd5c1a4ed906
Database: OpenAIRE
Description
Abstract:Identification of the catalyst characteristics correlating with the key performance parameters including selectivity and stability is key to the rational catalyst design. Herein we focused on the identification of property-performance relationships in the methanol-to-olefin (MTO) process by studying in detail the catalytic behaviour of MFI, MEL and their respective intergrowth zeolites. The detailed material characterization reveals that both the high production of propylene and butylenes and the large MeOH conversion capacity correlate with the enrichment of lattice Al sites in the channels of the pentasil structure as identified by 27Al MAS NMR and 3-methylpentane cracking results. The lack of correlation between MTO performance and other catalyst characteristics, such as crystal size, presence of external Brønsted acid sites and Al pairing suggests their less pronounced role in defining the propylene selectivity. Our analysis reveals that catalyst deactivation is rather complex and is strongly affected by the enrichment of lattice Al in the intersections, the overall Al-content, and crystal size. The intergrowth of MFI and MEL phases accelerates the catalyst deactivation rate.
ISSN:18722067
DOI:10.1016/s1872-2067(21)63990-6