Cycloaddition of limonene epoxide and CO2 over Zn/SBA-15 catalysts for limonene carbonate synthesis

The cycloaddition reaction of CO2 with epoxides such as limonene epoxide (LE) to form cyclic carbonates is considered a promising alternative for reducing CO2 emissions. In this work, CO2 fixation on LE to produce cyclic carbonates was carried out over Zn/SBA-15 with tetrabutylammonium bromide (TBAB) as co-catalyst and over NH3X-Zn/SBA-15 (X= Cl, Br, or I) catalysts. The catalysts were characterized by FT-IR, XRD, N2 adsorption–desorption isotherms, TEM, NH3-TPD, XPS, TGA and Py-FTIR. The Zn/SBA-15 support mainly presents Lewis’s acid sites of medium acidity; the surface area was 512 m2 /g and 378 m2 /g and the pore size were 9 nm and 7.2 nm, for Zn/SBA-15 and NH3Cl-Zn/SBA-15, respectively. The functionalization of Zn/SBA-15 was verified by FTIR, UV-vis, and XPS analysis. It was found that when Zn/SBA-15 was used as catalyst that reaction time had a significative effect on LE conversion and in the case of limonene carbonate selectivity, co-catalyst concentration variation had the main effect. Zn/SBA-15 catalyst can be reused up to 5 times without significant changes neither in conversion nor in limonene carbonate selectivity. The best LE conversion and limonene carbonate selectivity was 33% and 93%, respectively (1 M LE, 200 mg Zn/SBA-15, 7% TBAB; 30 bar, 18 h, 700 rpm and 20 mL diethyl carbonate). The reported catalytic system is a promising system for obtaining limonene carbonate using a heterogeneous catalyst.

• Autores: Villa Holgín, Aída Luz; Mosquera Bonilla, Yiceth Carina
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2024
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/46673
• Acceso en línea: https://hdl.handle.net/10495/46673
• Palabra clave: Carbonatos; Carbonates; Dióxido Carbono; Carbon dioxide; Catalizadores; Catalysts; Limoneno; Limonene; http://aims.fao.org/aos/agrovoc/c_28446; ODS 9: Industria, innovación e infraestructura. Construir infraestructuras resilientes, promover la industrialización inclusiva y sostenible y fomentar la innovación; ODS 12: Producción y consumo responsables. Garantizar modalidades de consumo y producción sostenibles; ODS 13: Acción por el Clima. Adoptar medidas urgentes para combatir el cambio climático y sus efectos
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/