Electrochemical process for fatty acid removal from glycerol
An innovative electrochemical process to remove fatty acids from glycerol by local pH reduction using ion exchange membranes, enhancing purity without adding undesirable anionic species. Suitable for glycerol purification in industrial applications.
Overview
This innovative electrochemical process is designed to remove fatty acids from glycerol, a byproduct of biodiesel production. By locally reducing the pH through an ion exchange membrane, this method precipitates fatty acids without introducing undesirable anionic species into the glycerol solution. This approach offers a cleaner alternative to traditional acidification methods, making the glycerol purification process more efficient and environmentally friendly.
Technical specifications
The process involves oxidizing hydrogen at an anode, allowing protons to pass through an ion exchange membrane to the cathodic side, where they are captured by a porous electrode. This lowers the local pH, causing fatty acids to precipitate and phase separate for easy removal. Control over current density and electrode porosity allows precise management of the internal pH. Hydrogen evolution at the cathode is used for continuous recirculation, enhancing process efficiency.
Technology readiness level
Currently, the technology is at TRL 2, with a proof of concept planned at Drexel University. The next steps involve optimizing flow rates and electrode design for pilot scale operation once purity requirements are met.
About Drexel University
Drexel University is a comprehensive private research university in Philadelphia, recognized for an urban, industry‑embedded model anchored by a longstanding cooperative education program. Year‑round co‑ops create a ready talent pipeline and align sponsored research with real‑world needs. The campus sits within an innovation district with co‑located labs and incubators, enabling companies to collaborate on prototyping with faculty. Through the university’s medical college and clinical partners, industry teams can access clinical expertise and translational pathways. Research is supported by competitive federal funding from agencies such as NIH, NSF, DOE, and DoD. A dedicated technology transfer office manages IP, licensing, corporate research agreements, and startup formation.
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