Hydrolysis of ionic cellulose to glucose

Area of Science:

• Biomass Conversion and Bioenergy
• Green Chemistry and Catalysis
• Carbohydrate Chemistry

Background:

• Cellulose, a abundant biopolymer, is a potential source for glucose production.
• Ionic cellulose (IC) offers a pathway for cellulose dissolution and modification.
• Efficient hydrolysis of IC to glucose is crucial for sustainable chemical synthesis.

Purpose of the Study:

• To investigate the catalytic hydrolysis of ionic cellulose (IC) for glucose synthesis.
• To identify effective catalysts for enhancing glucose yield from IC.
• To evaluate the reusability and stability of the optimal catalyst.

Main Methods:

• Synthesis of ionic cellulose (1,3-dimethylimidazolium cellulose phosphite) from cellulose.
• Hydrolysis of IC without catalyst at 150°C for 12h.
• Screening of various acid catalysts, focusing on sulfonated active carbon (AC-SO3H).
• Optimization of reaction conditions (temperature, time) with AC-SO3H.
• Assessment of catalyst reusability through consecutive reaction cycles.

Main Results:

• Uncatalyzed hydrolysis yielded 14.6% glucose.
• AC-SO3H significantly improved glucose yield, reaching 42.4% at 150°C (12h) and 53.9% at 180°C (1.5h).
• Higher temperatures and prolonged reaction times led to glucose degradation.
• The AC-SO3H catalyst maintained its efficacy over four successive reuse cycles.

Conclusions:

• Sulfonated active carbon (AC-SO3H) is a highly effective and reusable catalyst for ionic cellulose hydrolysis.
• Optimized conditions enable significant glucose yields, demonstrating potential for industrial application.
• Catalyst stability and efficiency support its use in sustainable biomass conversion processes.