Background

Transitioning the transportation industry from combustion engines to fuel cells is an important step towards reducing human impacts (e.g. fossil fuel consumption and greenhouse gas emissions) on the environment. However, the cost, performance and durability of fuel cell technology currently inhibits full market buy-in. New technologies that address or improve upon these parameters are in high demand by manufacturers who seek to meet future transportation needs in a clean and sustainable way.

Under realistic operating conditions, air contaminants present a clear challenge to fuel cells. Granular activated carbon (AC) is an excellent filtration material, but it requires multiple adsorption-regeneration cycles in order to remain effective. The conventional method of regenerating the AC, thermal regeneration, results in high energy costs, carbon loss and limited adsorption cycles.

Technology Overview

Researchers at the University of Hawai’i have developed a novel material and methods that enable regeneration of activated carbon through photocatalysis, which requires only water and sunlight. Because of its simplicity, this invention can be used over multiple cycles without sophisticated equipment and a steep learning curve. The techniques described in this invention can reduce the consumption of resources and energy associated with using fresh AC for air filtration in fuel cells.

Features

Effective air purification and regeneration of saturated AC in fuel cell filters
Photocatalytic regeneration of AC uses only water and sunlight
Method is simple and preserves more AC as compared to conventional methods

Benefits

Prolongs the life of the AC filter
Helps maintain optimal performance and durability of fuel cells
Reduces energy costs and carbon loss compared to conventional regeneration methods
Reduces the need for hazardous waste disposal

Novel Material and Methods for Photocatalytic Regeneration of Activated Carbon

Patents

IP Status

Seeking