Customizable activated carbon for chemical removal of flavor compounds in beverages

Overview

This solution offers a customizable activated carbon (AC) adsorbent engineered for the selective removal of unwanted flavor compounds in beverages, with an initial focus on coconut water. The technology addresses the challenge of off-flavors caused by aldehydes, lactones, benzothiazoles, and alcohols by leveraging chemisorption rather than simple physical adsorption. By tuning the concentration of oxygenated and amine functional groups, along with pore size and surface area, the activated carbon can be tailored to target specific compound classes. This approach gives beverage manufacturers a flexible tool for improving sensory quality and product consistency.

Technical specifications

Key features:

• Activated carbon derived from agricultural residues, with properties controlled by pretreatment temperature, pressure, chemical activation agent, and feedstock quality
• Tunable oxygenated functional groups (O/C ratio) that promote chemisorption of lactones and benzothiazoles
• Amine-impregnated variants designed to capture aldehydes and alcohols
• Adjustable pore size, surface area, and porosity to optimize adsorption kinetics and capacity
• Demonstrated vanillin removal of up to 98% within 1–2 hours using AC with the highest oxygenated functional group concentration
• Regenerability and adsorption kinetics to be characterized for cost-effective reuse

Technology readiness level

The activated carbon platform has been validated at the laboratory scale for the removal of phenolic contaminants from wastewater, with tunable oxygen functional groups confirmed through materials characterization and adsorption studies. Vanillin removal experiments have demonstrated high efficiency in short contact times. The next phase of validation will extend the technology to coconut water–relevant flavor compounds, first as individual analytes, then in mixtures, and finally in real coconut water samples over an estimated six-month study period. The technology is at an early-to-mid stage of development, with ongoing optimization of AC properties for beverage applications.