Production of levulinic acid from macroalgae by hydrothermal conversion with ionic resin catalyst.
Youngshin Park1, Gwi-Taek Jeong1
1Department of Biotechnology, School of Marine, Fisheries and Life Science, Pukyong National University, Busan 48513, Republic of Korea.
Bioresource Technology
|May 3, 2024
Summary
This study optimized hydrothermal conversion of red algae Gracilaria verrucosa to produce levulinic acid (LA) using an ionic resin catalyst. A 30.3% yield of LA was achieved, highlighting algae
Area of Science:
- Biomass Conversion
- Renewable Energy
- Marine Biotechnology
Background:
- Gracilaria verrucosa, a red algae, is a promising marine bioresource for sustainable bioenergy.
- Levulinic acid (LA) is a key platform chemical with diverse industrial applications.
- Hydrothermal conversion offers an efficient method for biomass valorization.
Purpose of the Study:
- To optimize the hydrothermal conversion of Gracilaria verrucosa for levulinic acid production.
- To investigate the catalytic role of the ionic resin Purolite CT269DR in this process.
- To determine the optimal conditions for maximizing levulinic acid yield.
Main Methods:
- Hydrothermal conversion of Gracilaria verrucosa biomass.
- Utilized Purolite CT269DR as a heterogeneous ionic resin catalyst.
- Optimized reaction parameters including temperature, time, biomass loading, and catalyst loading.
- Analyzed levulinic acid and formic acid yields based on carbohydrate content.
Main Results:
- Achieved a maximum levulinic acid yield of 30.3% (22.58 g/L) under optimized conditions (200°C, 90 min, 12.5% biomass, 50% catalyst loading).
- Obtained a 14.0% (10.42 g/L) yield of formic acid concurrently.
- Levulinic acid yield demonstrated a positive correlation with increasing combined severity (CS) levels.
- A linear increase in LA yield was observed with a decrease in sugar yield.
Conclusions:
- The ionic resin Purolite CT269DR effectively catalyzes the hydrothermal conversion of Gracilaria verrucosa to levulinic acid.
- Optimized conditions provide a high yield of levulinic acid, demonstrating the potential of marine macroalgae as a feedstock.
- This process offers a sustainable route for producing valuable platform chemicals from renewable marine resources.
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