Structure–Activity Relationships of WOx-Promoted TiO2–ZrO2 Solid Acid Catalyst for Acetalization and Ketalization of Glycerol towards Biofuel Additives

Baithy, Mallesham and Mukherjee, Deboshree and Rangaswamy, Agolu and et al, . (2022) Structure–Activity Relationships of WOx-Promoted TiO2–ZrO2 Solid Acid Catalyst for Acetalization and Ketalization of Glycerol towards Biofuel Additives. Catalysis Letters, 152 (5). pp. 1428-1440. ISSN 1011-372X

Text
Catalysis-Letters_2022_152_1428-1440.pdf - Published Version
Restricted to Registered users only
Download (3MB) | Request a copy

Abstract

Abstract: WOx-promoted TiO2–ZrO2 solid acid catalyst was prepared and applied in the catalytic acetalization and ketalization of glycerol with carbonyl compounds to produce biofuel additives. The presence of WOx promoter and TiO2 remarkably improved the catalytic activity of ZrO2. Approximately, 100% glycerol conversion was evidenced with non-bulky aliphatic aldehydes and ketones like, propanol and cyclohexanone. The physical characterization of WOx-promoted TiO2–ZrO2, revealed a higher formation of tetragonal crystalline phase of ZrO2, over monoclinic. The total surface acidity and the ratio of Brønsted to Lewis acidic site concentrations were determined by NH3-TPD and pyridine-chemisorbed FTIR spectroscopy, respectively. A considerably higher concentration of Lewis acidic sites, ~ 213.29 μmol/gm, was evidenced on the WOx-promoted TiO2–ZrO2 catalyst surface. Catalytic activity study revealed a direct correlation between the surface Lewis acidic site concentration and the activity of catalyst. This significant observation indicated the key role of Lewis acidic sites in this catalytic process. The WOx-promoted TiO2–ZrO2 catalyst was also considerably stable and showed good performance in the acetalization/ketalization of glycerol with other substituted carbonyl compounds. Graphic Abstract: The WOx-promoted TiO2–ZrO2 solid acid catalyst exhibits superior catalytic performance for acetalization and ketalization of glycerol with carbonyl compounds to produce biofuel additives. [Figure not available: see fulltext.]. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

[error in script]

IITH Creators:

IITH Creators	ORCiD

Item Type:

Article

Additional Information:

MB thanks Department of Science and Technology (DST)-SERB, New Delhi for the award of National Post-Doctoral Fellowship (PDF/2018/002244). RA thanks the Council of Scientific and Industrial Research (CSIR), New Delhi for senior research fellowship. DM thanks the University Grants Commission (UGC), New Delhi, for senior research fellowship. BMR thanks the Department of Atomic Energy (DAE), Mumbai for the award of the Raja Ramanna Fellowship.

Uncontrolled Keywords:

Aldehydes; Biofuel additives; Bioglycerol; Ketones; Lewis acidic sites; Solid acid catalyst; WOx/TiO2−ZrO2

Subjects:

Chemical Engineering

Divisions:

Department of Chemical Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

30 Jun 2022 07:20

Last Modified:

01 Jul 2022 10:09