Work

Catalytic evaluation of eggshell‐based calcium methoxide over Al 2 O 3 for biodiesel generation from waste cooking oil

Year: 2024

Type: article

Abstract: Shell‐derived materials are promising heterogeneous catalysts for biodiesel production due to their nontoxic and renewable nature, but they have the disadvantage of being highly leachable. To overcome this issue, Ca(OCH 3 ) 2 formed through the reaction of CaO with methanol, and supported in turn on Al 2 O 3 is proposed as a catalytic system for the transesterification of fresh soybean oil and waste cooking oil (WCO). First, catalysts with several Al/Ca molar ratios (0.2, 0.5, and 0.8‐AC), as well as their precursors (CaO and Al 2 O 3 ) alone, were tested at 60 °C, catalyst loading 6% wt, methanol‐to‐oil molar ratio (MOR) 10, for 1 h for fresh oil, and 3 h for WCO. The 0.2‐AC catalyst generated the highest biodiesel yield for both oils. The optimum operating conditions for WCO transesterification, determined by using a univariable approach, were 60 °C, 9 wt% catalyst loading, MOR of 12.5, and a reaction time of 3 h. These improved conditions led to yields higher than 90% for pure CaO and the 0.2, 0.5, and 0.8‐AC catalysts. The density, kinematic viscosity, and refractive index of the biodiesel obtained were measured.

Source: Biofuels Bioproducts and Biorefining

DOI: 10.1002/bbb.2684

Authors: Fernando Camacho‐Valencia, Gabriela Vázquez‐Rodríguez, J. Andrés Tavizón‐Pozos

Institutions: Universidad Autónoma del Estado de Hidalgo, Universidad Autónoma Metropolitana

Language: English

Topic: Biodiesel Production and Applications

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Responsible consumption and production

Open Access status: bronze

Funder: Consejo Nacional de Ciencia y Tecnología