Continuous-Flow Process for Glycerol Conversion to Solketal Using a Brönsted Acid Functionalized Carbon-Based Catalyst

Catalysts

MaríaÁngeles Larrubia¹  Vanesa Domínguez-Barroso¹  Rafael González-Gil¹  Concepción Herrera¹  Marina Cortés-Reyes¹  LuisJ. Alemany¹ 

[1] Departamento de Ingeniería Química, Facultad de Ciencias, Universidad de Málaga, Campus Teatinos s/n, E29071 Málaga, Spain;

关键词: biofuel additive;    monolithic catalyst;    brönsted acidity;    glycerol valorization;    continuous-flow reactor;   

DOI  :  10.3390/catal9070609

来源: DOAJ

【 摘 要 】

The acetalization of glycerol with acetone represents a strategy for its valorization into solketal as a fuel additive component. Thus, acid carbon-based structured catalyst (SO₃H-C) has been prepared, characterized and tested in this reaction. The structured catalyst (L = 5 cm, d = 1 cm) showed a high surface density of acidic sites (2.9 mmol H⁺ g⁻¹) and a high surface area. This catalyst is highly active and stable in the solketal reaction production in a batch reactor system and in a continuous downflow reactor, where several parameters were studied such as the variation of time of reaction, temperature, acetone/glycerol molar ratio (A/G) and weight hourly space velocity (WHSV). A complete glycerol conversion and 100% of solketal selectivity were achieved working in the continuous flow reactor equipped with distillation equipment when WHSV is 2.9 h⁻¹, A/G = 8 at 57 °C in a co-solvent free operation. The catalyst maintained its activity under continuous flow even after 300 min of reaction.

【 授权许可】

Unknown