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Porous Adsorbents and Catalysts
Microporous zeolites with large internal surfaces of up to 2000 m2/g and pore or cage diameters in the range of 0.5 to 1.2 nm, e.g. for zeolites SAPO-34, SSZ-13, ZSM-5, MCM-22, EU-1, Beta, and Y, are reaction vessels in a molecular scale and play an important role as shape-selective catalysts in research and chemical industry (see "Publications" and [1]). Substitution of framework silicon by aluminum atoms makes these materials to solid acids, which are suitable to replace polluting liquid acids as catalysts in numerous industrial processes. Due to their well-defined pore systems, these materials are also utilized as molecular sieves in separation processes. During the past decades, routes for the synthesis of mesoporous materials with pore diameters of more than 10 nm were developed. These mesoporous materials, such as MCM-41 ([2], [3], [4], [5]) and SBA-15 ([6], [7], [8], [9]), have frameworks consisting of amorphous walls and ordered mesopores in hexagonal arrangement. Since these materials have no intrinsic catalytic properties, modification of their internal surface is required for developing novel mesoporous solids, which are interesting for applications as adsorbents and catalysts. Dry-gel synthesis routes, the use of zeolite seeds in the synthesis of ordered mesoporous materials, and the introduction of metal species lead to hybrid catalysts with Broensted acidic ([4], [10], [11], [12]), Lewis acidic [5], and redox properties [13]. In further approaches, ordered mesoporous materials were utilized as supports of catalytically active compounds, such as aluminum species
Microporous zeolites with large internal surfaces of up to 2000 m2/g and pore or cage diameters in the range of 0.5 to 1.2 nm, e.g. for zeolites SAPO-34, SSZ-13, ZSM-5, MCM-22, EU-1, Beta, and Y, are reaction vessels in a molecular scale and play an important role as shape-selective catalysts in research and chemical industry (see "Publications" and [1]). Substitution of framework silicon by aluminum atoms makes these materials to solid acids, which are suitable to replace polluting liquid acids as catalysts in numerous industrial processes. Due to their well-defined pore systems, these materials are also utilized as molecular sieves in separation processes. During the past decades, routes for the synthesis of mesoporous materials with pore diameters of more than 10 nm were developed. These mesoporous materials, such as MCM-41 ([2], [3], [4], [5]) and SBA-15 ([6], [7], [8], [9]), have frameworks consisting of amorphous walls and ordered mesopores in hexagonal arrangement. Since these materials have no intrinsic catalytic properties, modification of their internal surface is required for developing novel mesoporous solids, which are interesting for applications as adsorbents and catalysts. Dry-gel synthesis routes, the use of zeolite seeds in the synthesis of ordered mesoporous materials, and the introduction of metal species lead to hybrid catalysts with Broensted acidic ([4], [10], [11], [12]), Lewis acidic [5], and redox properties [13]. In further approaches, ordered mesoporous materials were utilized as supports of catalytically active compounds, such as aluminum species
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Mariusz Gackowski,Anne Selent, Ilari Ainasoja,Michal Mazur,Michael Hunger,Jerzy Datka,Ville-Veikko Telkki
Microporous and Mesoporous Materials (2023): 112626-112626
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