Coke-tolerant SiW20-Al/Zr10 catalyst for glycerol dehydration to acrolein

Talebian‐Kiakalaieh, Amin; Amin, Nor Aishah Saidina

doi:10.1016/s1872-2067(17)62891-2

Cited by 22 publications

(12 citation statements)

References 61 publications

(71 reference statements)

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“…POMs supported on oxides (e.g. titania, 73 niobia, 74,75 alumina, 76,77 silica, alumosilicate, 78 and zirconium dioxide 77,79 ) and molecular sieves (MCM-41, 80 amino siloxane-functionalised MCM-41, 80,81 Zr-MCM-41, 82,83 SBA-15, 84 41 for the dehydration of glycerol to acrolein. The selectivity to acrolein increased with the increasing ratio of Brønsted to Lewis acids, while the lower ratio of Brønsted/Lewis acids favoured the production of hydroxyacetone as undesired side products.…”

Section: 69-72mentioning

confidence: 99%

Biomass valorisation over polyoxometalate-based catalysts

2021

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Section: 69-72mentioning

confidence: 99%

Biomass valorisation over polyoxometalate-based catalysts

2021

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“…Glycerol undergoes a dehydration step followed by tautomeric rearrangement producing acetol. Brønsted acid sites [145,152,[184][185][186][187][188][189]…”

Section: Conflict Of Interestmentioning

confidence: 99%

Catalytic Conversion of Glycerol to Acetol and Acrolein Using Metal Oxides: Surface Reactions, Prospects and Challenges

Barbosa

Braga

2022

ChemCatChem

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Glycerol dehydration to acetol and acrolein is an interesting reaction pathway for conversion of biomass‐derived products. However, they undergo extensive deactivation due to coke deposition and sintering, requiring the design of stable catalysts. The oxides stand out due to their natural abundance, simple synthesis, low cost and tunable acidic, basic and redox properties. The different studies apply these oxides as pure phase, supported, mixed or doped. However, it is observed that despite the large number of applied oxides in glycerol conversion, few works describe in detail about more complex oxides such as ferrites, hexaferrites, perovskites, among others. This review reports different acid oxides in the glycerol dehydration to acetol and acrolein as well as basic and redox oxides, describing a historical perspective, showing the most important theoretical foundations of heterogeneous catalysis to comprehend surface reactions and mentioning the different possibilities to understanding the different reactional pathway, highlighting the proposal mechanisms that explain the participation of the different active sites on the surface reactions. Furthermore, the sequence of reactions which show the origin of the coke deposited on catalyst surface was presented, emphasizing the main challenges. The role of the Lewis and Brønsted acid‐base sites present in the metal oxides and their interactions on glycerol dehydration were described, providing a direction to design catalysts for selective dehydration reactions resistant against coke deposition and sintering.

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“…However, further research have showed that a high value of total acidity (especially, Brønsted acid sites) causes a high initial activity and selectivity of a catalyst, but the lifetime of such catalysts is very short due to the increasing of the generation of coke on the catalyst surface. [24][25][26][27][28][29] As a result, the selectivity to acrolein can reduce (Table 1). Interestingly, in all represented examples in Table 1, there is a correlation between total acidity and long-life selectivity as well as changes in selectivity which increases significantly for the catalysts with a higher amount of acid sites.…”

Section: Amount and Strength Of Acid Sitesmentioning

confidence: 99%

Tuning of Selectivity for Sustainable Production of Acrolein from Glycerol

Belousov

2021

ChemistrySelect

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The catalytic dehydration of glycerol into acrolein is a rapidly growing area of both scientific interest and technological importance. The main problem faced by researchers is enhancement of selectivity while maintaining the stability and activity of a catalyst. This minireview is centered on key approaches for tuning of selectivity: changing of physicochemical properties (type of acid sites, its amount, pore and channel size, and doping with noble metals) and selection of optimal reaction conditions (temperature, contact time, feedstock composition, co-feeding O 2 or air). This overview also proposes and discusses the use of metal-organic frameworks as novel catalysts to overcome the main challenges in the dehydration of glycerol.

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Coke-tolerant SiW20-Al/Zr10 catalyst for glycerol dehydration to acrolein

Cited by 22 publications

References 61 publications

Biomass valorisation over polyoxometalate-based catalysts

Biomass valorisation over polyoxometalate-based catalysts

Catalytic Conversion of Glycerol to Acetol and Acrolein Using Metal Oxides: Surface Reactions, Prospects and Challenges

Tuning of Selectivity for Sustainable Production of Acrolein from Glycerol

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