Application of MIL-101(Cr) for biofuel dehydration and process optimization using the central composite design method

Area of Science:

• Materials Science
• Chemical Engineering
• Green Chemistry

Background:

• Petro-based fuels face replacement by renewable alternatives like biofuels.
• Biofuel production using alcohol-water mixtures presents challenges such as side reactions and catalyst deactivation.
• Highly pure reactants are crucial for efficient biofuel synthesis.

Purpose of the Study:

• To synthesize and characterize MIL-101(Cr) for biofuel dehydration.
• To optimize operational parameters (water concentration, catalyst dosage, temperature) for biofuel dehydration using Central Composite Design (CCD).
• To develop a predictive quadratic model for the dehydration process.

Main Methods:

• Hydrothermal synthesis of MIL-101(Cr).
• Characterization of MIL-101(Cr) using XRD, SEM, DSC/TGA, and N2 physisorption.
• Optimization of process parameters using Central Composite Design (CCD) and variance analysis.

Main Results:

• A refined quadratic equation with R² = 95.26% was developed to predict process behavior.
• Temperature was identified as the most influential parameter.
• Optimal conditions determined: 1.41 initial water concentration, 0.14 catalyst dosage, and 302.5 K temperature, yielding a capacity of 1349.72 and desirability of 0.95.
• MIL-101(Cr) exhibited uniform octahedral shape (200-500 nm) with microporous windows and mesoporous cages.

Conclusions:

• MIL-101(Cr) is an effective catalyst for biofuel dehydration.
• The CCD method successfully optimized the process parameters.
• The developed model accurately predicts process behavior, paving the way for efficient biofuel production.