Glycerol valorization using Colombian olivine as a catalyst

Area of Science:

• Catalysis
• Chemical Engineering
• Materials Science
• Environmental Science

Background:

• Biodiesel production generates substantial crude glycerol, posing environmental challenges due to accumulation and lack of market value.
• Valorization of crude glycerol is crucial for sustainable biodiesel industry practices and waste stream management.

Purpose of the Study:

• To evaluate the catalytic performance of Colombian olivine in glycerol steam reforming.
• To explore glycerol valorization into valuable gas-phase (syngas) and liquid-phase products using an olivine catalyst.

Main Methods:

• Colombian olivine was thermally treated at 1200°C and reduced at 900°C to form nanometer-sized Fe compounds.
• Catalyst characterization included X-ray diffraction (XRD), BET surface area analysis, SEM, TPR, and TEM.
• Glycerol steam reforming experiments were conducted at various temperatures (600°C, 700°C, 800°C) with and without the catalyst.

Main Results:

• Calcined olivine significantly enhanced glycerol conversion from 43% to 96% at 600°C, producing liquid-phase aldehydes and carboxylic acids.
• Syngas with H2/CO ratios of 1.1 and 1.5 was generated at 700°C and 800°C, respectively, with minimal methane content.
• The catalyst demonstrated high activity and selectivity for both liquid and gas product formation.

Conclusions:

• Thermally treated Colombian olivine is a viable and effective catalyst for glycerol steam reforming.
• This catalytic process presents an attractive alternative for valorizing crude glycerol into valuable chemical products.
• The findings support the use of local geological materials for sustainable industrial byproduct management.