Synthesis and characterization of Ni-incorporated mesoporous silica material for its potential applications in oligomerization of glycerol

Jeyamalar, J. Ilavarasi; Krishnaveni, M.; Kannan, Chellapandian

doi:10.1080/10426507.2022.2046571

Cited by 4 publications

(1 citation statement)

References 36 publications

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“…Their proton form shows a strong acid character, comparable even to strong mineral acids, thanks to the Brønsted acid centers formed by OH groups, which are bridging elements between the tetrahedral coordinated aluminum and silicon atoms in the crystalline aluminosilicates. For example, when converting glycerin using 20 g of Beta zeolite (Si/Al 50/50 molar ratio, 0.1% by weight of Na 2 O, grain size 0.1–0.7 µm, surface area 750 m 2 /g) in at 200 °C for 2 h, a product is obtained with 60% efficiency, which contains 30% linear diglycerol, 30% cyclic di-glycerol, 30% cyclic triglycerol, and 10% higher oligomers [ 6 , 7 , 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquids as Homogeneous Catalysts for Glycerol Oligomerization

et al. 2022

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Ionic liquids (ILs) were used for the first time as catalysts for the glycerin condensation reaction. A series of imidazolium and ammonium ionic liquids differing in the length of the alkyl substituent (C2, C12, and C14) and the type of anion (Br−, CH3COO−, and NaHPO4−) were synthesized using a typical two-step method. The structure of the obtained ILs was confirmed by nuclear magnetic resonance 13C NMR, and their base power was determined on the basis of the Hammett function. The oligomerization of glycerin with the participation of the obtained ionic liquids and, for comparison, in the presence of a homogeneous basic catalyst Na2CO3, was carried out for 3 h at 180 °C, under a pressure of 0.4 bar, where the highest conversion, i.e., 92%, was obtained against 1-dodecyl-N, N, N-triethylammonium acetate. The course of the reaction was monitored using a reaction system coupled with a FTIR spectrometer, which allowed for the tracking of changes in product concentration over time and the assessment of glycerin oligomerization kinetics. The reaction products were analyzed by positive electrospray ionization mass spectrometry (ESI-MS), 13C NMR, and infrared absorption spectroscopy (FTIR).

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Section: Introductionmentioning

confidence: 99%

Ionic Liquids as Homogeneous Catalysts for Glycerol Oligomerization

et al. 2022

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Unveiling the catalytic potential of K₂ZnF₆ fluoroperovskite for glycerol oligomerization

Barros,

Moreno‐Tost,

Cecilia

et al. 2024

Biofuels Bioprod Bioref

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This study systematically evaluates fluorine‐containing materials with varying compositions of K, Al, Co, Cu, Mg, and Zn as catalysts for glycerol oligomerization. Comprehensive analyses were conducted for all of the catalysts, considering their structural, compositional, morphological characteristics, and basicity, to understand them in greater depth. Among these analyses, gas chromatography was employed to examine the composition of the reaction products. The investigation extended to a recycling study under optimized conditions. Thermogravimetric analysis and X‐ray photoelectron spectroscopy were used to characterize the spent catalysts. Catalytic activity was found to be influenced strongly by the fluorine content, demonstrating remarkable performance for the materials containing fluoroperovskites such as KMgF3 in the catalyst KMgAFC, and K2ZnF6 in KZAFC. Remarkably, KZAFC with 20% fluorine exhibited superior glycerol conversion (68%) and selectivity for diglycerol (27%). Comparative analysis with ZnAl‐layered double hydroxide highlighted the positive impact of fluorine on catalytic activity. Introducing a calcination step in the catalyst recovery process also demonstrated improved activity during recycling. Interestingly, KZAFC exhibited stability over four reaction cycles, presenting an economic advantage over homogeneous catalysts. The study also shed light on the potential fluorine loss at the surface and potassium leaching into reaction products, correlating these phenomena with the observed decline in activity. These comprehensive findings contribute significantly to advancing sustainable glycerol valorization through heterogeneous catalysis.

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Synthesis of an Innovative Framework of Mesoporous Catalyst (Kangolite) by Simple Approach to Promote the Catalytic Activity for CO2 Decomposition

Chellapandian

2024

Silicon

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Synthesis and characterization of Ni-incorporated mesoporous silica material for its potential applications in oligomerization of glycerol

Cited by 4 publications

References 36 publications

Ionic Liquids as Homogeneous Catalysts for Glycerol Oligomerization

Ionic Liquids as Homogeneous Catalysts for Glycerol Oligomerization

Unveiling the catalytic potential of K₂ZnF₆ fluoroperovskite for glycerol oligomerization

Synthesis of an Innovative Framework of Mesoporous Catalyst (Kangolite) by Simple Approach to Promote the Catalytic Activity for CO2 Decomposition

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Synthesis and characterization of Ni-incorporated mesoporous silica material for its potential applications in oligomerization of glycerol

Cited by 4 publications

References 36 publications

Ionic Liquids as Homogeneous Catalysts for Glycerol Oligomerization

Ionic Liquids as Homogeneous Catalysts for Glycerol Oligomerization

Unveiling the catalytic potential of K2ZnF6 fluoroperovskite for glycerol oligomerization

Synthesis of an Innovative Framework of Mesoporous Catalyst (Kangolite) by Simple Approach to Promote the Catalytic Activity for CO2 Decomposition

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Unveiling the catalytic potential of K₂ZnF₆ fluoroperovskite for glycerol oligomerization