Deep eutectic solvent-functionalized biochar derived tobacco stalks: A novel heterogeneous catalyst for solketal synthesis
Year: 2025
Type: article
Abstract: This study investigates the synthesis of catalyst by the impregnation of acidic deep eutectic solvent into biochar obtained from tobacco stalk. And also, the catalytic activity of the synthesized catalyst was tested in the acetalization reaction of glycerol and acetone to synthesize solketal, a versatile bioadditive of fuel. Deep eutectic solvent containing choline chloride and para toluene sulfonic acid has been used to alter the surface functionality of biochar. The changes in textural features, surface chemistry and morphology of activated biochar (A-BC) and DES-impregnated biochar (B-DES@A-BC) were characterized. The characterization methods highlighted change in properties after DES impregnation; surface area and pore volume decreased significantly, more acidic functional groups added and developed on the surface and also pore size increased. Under the optimized conditions (T = 50 °C, molar ratio of acetone to glycerol = 15:1, catalyst loading = 8 wt%, reaction time = 60 min), B-DES@A-BC showed excellent reusability and catalytic activity; 93.9 % of glycerol conversion and 97.4 % of solketal selectivity. B-DES@A-BC catalyst was found to be efficient, economical, sustainable and efficient. So, preparing heterogeneous catalyst from biomass by carbonization and following DES impregnation could be proposed as a promising method. DES containing choline chloride and para toluene sulfonic acid was found to be effective agent to improve catalytic activity introducing functionalities.
Source: Biomass and Bioenergy
Authors: Hasan Örtün, Murat Sert, Emine Sert
Institutions: Ege University, Mersin Üniversitesi
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,270
Award: G8175865717
OpenAlex ID: W4413808019