Well-dispersed sulfated mesoporous WO 3 /SiO 2 hybrid colloidal spheres: High-efficiency catalysts for the synthesis of fatty acid alkyl esters

Chen, Guochang; Qiao, Hui; Cao, Jikang; Wang, Zhicai; Ye, Mingfu; Guo, Cun‐Yue; Ding, Piaofei; Wen, Xiaoming

doi:10.1016/j.fuel.2015.09.029

Cited by 8 publications

(2 citation statements)

References 25 publications

(37 reference statements)

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“…The observations clearly indicate that there was retention of crystalline phases of monoclinic sodium zirconate and monoclinic zirconia even after the impregnation of Na/ZrO2 over mesoporous silica. Similar observation has been mentioned in literature while the native structure of phosphotungstic acid (HPW) and WO3 were retained even after impregnating them over mesoporous siliceous support [21].…”

Section: Catalyst Characterisation 311 Powder Xrd Studysupporting

confidence: 90%

Sodium doped zirconia drenched SBA-15 as a reusable solid catalyst for concurrent esterification and transesterification of low-quality oils

Malhotra¹,

Ali²,

Kumar³

2022

YMER

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Sodium doped zirconia impregnated SBA-15 has been prepared without using hydrothermal treatment trailing the wet impregnation route. The prepared catalyst has been characterized by employing various techniques viz., BET for surface area analysis, SEM for morphological study, XPS for element oxidation state determination. It was found that catalyst seized both acidic and basic sites therefore, successfully employed for one-pot or concurrent esterification and transesterification of virgin cottonseed oil and high FFA containing vegetable oils. Under optimum reaction conditions of catalyst concentration of 10 wt% with respect to weight of oil, MeOH/oil molar ratio of 30:1 and at 65 °C reaction temperature, the catalyst could confer > 98 % fatty acid methyl ester yield within 3 h of reaction duration. Regeneration study advocated that the catalyst may well be recycled for 5 successive cycles without any significant trouncing of activity and even yielded 86% fatty acid methyl esters during 6th cycle. Keywords: Heterogeneous catalysts, mesoporous, basicity, acidity, transesterification, thermodynamic parameters

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Section: Catalyst Characterisation 311 Powder Xrd Studysupporting

confidence: 90%

Sodium doped zirconia drenched SBA-15 as a reusable solid catalyst for concurrent esterification and transesterification of low-quality oils

Malhotra¹,

Ali²,

Kumar³

2022

YMER

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“…Development of heterogeneous solid acid catalysts subject to different reasons has attracted much attention in the synthesis of esters . Organic esters are consumed as solvents, perfumes, essential oils, food flavourings, cosmetics, and pharmaceuticals.…”

Section: Introductionmentioning

confidence: 99%

Enhanced recovery and recycling of catalyst by post‐impregnation of γ‐Al₂O₃ with 12‐tungstophosphoric acid for esterification reaction

Nazari

Setayesh

2017

Can J Chem Eng

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12‐tungstophosphoric acid, polyoxometalate with Keggin structure, and γ‐Al2O3 were synthesized. Loading of 12‐tungstophosphoric acid (HPW) on γ‐Al2O3 was performed by the post‐impregnation method. The catalysts were characterized by XRD, SEM, FTIR, BET, and DRS techniques. According to the pertinent observation, using the post‐impregnation method promises the stability of polyoxometalate Keggin structure after loading on γ‐Al2O3 support. The stability of 20 %HPW/Al2O3 was also confirmed by a leaching test. Textural characterization demonstrates that HPW on the γ‐Al2O3 had a much larger surface area as compared with the pure HPW. The 20 %HPW/Al2O3 exhibited roughly high activity toward an esterification reaction. The influence of various reaction parameters (% loading HPW on support, reaction temperature, reaction time, catalyst weight, and acid/alcohol molar ratio) on the catalytic performance was studied. The efficiency of catalytic activity for six cycles remains approximately constant, which confirms the enhanced recovery and recycling of the catalyst. The kinetics of the esterification reaction and the kinetic parameters such as rate constants and activation energy were determined (25.37 kJ/mol).

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Ultrasonic-Assisted Preparation of WO3/SiO2 from Rigid Silicon Spheres for the Thiolation of Dimethyl Sulfide to Methanethiol

et al. 2022

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Well-dispersed sulfated mesoporous WO 3 /SiO 2 hybrid colloidal spheres: High-efficiency catalysts for the synthesis of fatty acid alkyl esters

Cited by 8 publications

References 25 publications

Sodium doped zirconia drenched SBA-15 as a reusable solid catalyst for concurrent esterification and transesterification of low-quality oils

Sodium doped zirconia drenched SBA-15 as a reusable solid catalyst for concurrent esterification and transesterification of low-quality oils

Enhanced recovery and recycling of catalyst by post‐impregnation of γ‐Al₂O₃ with 12‐tungstophosphoric acid for esterification reaction

Ultrasonic-Assisted Preparation of WO3/SiO2 from Rigid Silicon Spheres for the Thiolation of Dimethyl Sulfide to Methanethiol

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Well-dispersed sulfated mesoporous WO 3 /SiO 2 hybrid colloidal spheres: High-efficiency catalysts for the synthesis of fatty acid alkyl esters

Cited by 8 publications

References 25 publications

Sodium doped zirconia drenched SBA-15 as a reusable solid catalyst for concurrent esterification and transesterification of low-quality oils

Sodium doped zirconia drenched SBA-15 as a reusable solid catalyst for concurrent esterification and transesterification of low-quality oils

Enhanced recovery and recycling of catalyst by post‐impregnation of γ‐Al2O3 with 12‐tungstophosphoric acid for esterification reaction

Ultrasonic-Assisted Preparation of WO3/SiO2 from Rigid Silicon Spheres for the Thiolation of Dimethyl Sulfide to Methanethiol

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Enhanced recovery and recycling of catalyst by post‐impregnation of γ‐Al₂O₃ with 12‐tungstophosphoric acid for esterification reaction