Ambient temperature gas phase sulfonation: A mild route towards acid functionalized ordered mesoporous organosilica

Sandbrink, Lennart; Lazaridis, Timon; Rose, Marcus; Palkovits, Regina

doi:10.1016/j.micromeso.2018.03.030

Cited by 6 publications

(8 citation statements)

References 21 publications

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“…Moreover, in the same study, mesoporous sulfonic silica presented a better performance in term of stability, with no leaching of sulfonic groups with respect to amorphous silica. In following research [49,100], propyl sulfonic amorphous silica was applied in the synthesis of glycerol derivatives by using a microwaves-assisted procedure. With the use of microwaves as source of energy, the material showed very high stability during several cycle reactions.…”

Section: Considerations On the Stability Of Sulfonic Solid Acid Catalystsmentioning

confidence: 99%

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Sulfonic Acid-Functionalized Inorganic Materials as Efficient Catalysts in Various Applications: A Minireview

Testa

Parola

2021

Catalysts

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Acid catalysis is widely used in the chemical industry, and nowadays many efforts are being focused on replacing the more common homogeneous catalysts with heterogeneous ones in order to make greener the industrial processes. In this perspective, sulfonic solid acid materials represent a valid alternative to the homogenous mineral acid in several acid catalyzed reactions. In this minireview, an overview of the recent advances on the preparation, stability and application of these materials is reported. Special attention is addressed to the sustainability of the considered processes, starting from the catalyst’s preparation, the use of green solvents and reducing the possible reaction steps. Ways to tackle the main drawback represented by easy leaching of acid groups are described. For an easy catalyst recovery, the use of a magnetic core in a catalyst particle, with the related synthetic approaches, is also illustrated. Finally, a section is dedicated to the principal characterization techniques to identify the structural properties of the catalysts.

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Section: Considerations On the Stability Of Sulfonic Solid Acid Catalystsmentioning

confidence: 99%

“…[97]. Copyright 2010 Elsevier.XPS allows for comparison of the efficiency of different synthetic procedures by the measurements of the the S/Si ratio[10,[98][99][100]. Moradi et al confirmed by XPS the presence of two types of sulfur containing groups, sulfide (-S-S-) as a covalent bridge bond and sulfate (-SO 3 ) as active catalytic site (see Figure20)[38].…”

mentioning

confidence: 99%

Sulfonic Acid-Functionalized Inorganic Materials as Efficient Catalysts in Various Applications: A Minireview

Testa

Parola

2021

Catalysts

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“…The sulfonation of aromatic hydrocarbons is well established with various methods of processing. [41][42][43][44][45][46][47] The insertion of sulfonic acid groups in the materials of choice enables acid reactions in protic solvents. [44] There are several possible approaches to the sulfonation of polystyrene.…”

Section: Introductionmentioning

confidence: 99%

“…One is the use of concentrated sulfuric acid, [41,45] another is the use of sublimated sulfur trioxide in the gas phase, which can be generated most conveniently by sublimation of oleum. [46][47] These methods were applied in this work to functionalize the obtained monoliths. Further options include the sulfonation of polystyrene (PS) with acetyl sulfate [42] or the direct synthesis of polystyrene sulfonate.…”

Section: Introductionmentioning

confidence: 99%

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3D‐Printed Acidic Monolithic Catalysts for Liquid‐Phase Catalysis with Enhanced Mass Transfer Properties

2022

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The thriving research and development in additive manufacturing and especially 3D printing in chemical engineering and heterogeneous catalysis enables novel and innovative approaches for the shaping of catalysts. In this work, tailor-made monoliths with complex transport pore channels are designed and printed by fused deposition modelling (FDM) from polystyrene filament. Subsequently, sulfonic acid groups are introduced by sulfonation for a catalytic functionalization of the structured monoliths' accessible inner surface. As a catalytic test reaction, the aqueous phase hydrolysis of sucrose was chosen. For this reaction the functionalized monoliths exhibited a superior catalytic performance in both batch and continuous reaction mode in comparison to a macroporous sulfonic acidfunctionalized ion exchange resin as commercial benchmark catalyst. This is due to the higher accessibility of the sulfonic acid groups on the surface of the monoliths' pore channels and hence, enhanced effective reaction kinetics by decreased mass transfer limitations.

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Millimeter-sized micellar-templated silica beads and phenylene-bridged mesoporous organosilica beads

Bilo

Lee

Fröba

2019

Microporous and Mesoporous Materials

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Ambient temperature gas phase sulfonation: A mild route towards acid functionalized ordered mesoporous organosilica

Cited by 6 publications

References 21 publications

Sulfonic Acid-Functionalized Inorganic Materials as Efficient Catalysts in Various Applications: A Minireview

Sulfonic Acid-Functionalized Inorganic Materials as Efficient Catalysts in Various Applications: A Minireview

3D‐Printed Acidic Monolithic Catalysts for Liquid‐Phase Catalysis with Enhanced Mass Transfer Properties

Millimeter-sized micellar-templated silica beads and phenylene-bridged mesoporous organosilica beads

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