Ilmenite As Bed Material In CFB Boilers (VIDEO) Chalmers University of Technology This video is under embargo. Please login to access this video. Caption The animation show how ilmenite works as bed material with double functionality. Ilmenite may transport heat exactly as silica sand, but ilmenite also has an oxygen-carrying ability allowing the oxygen to be distributed evenly in the chamber. Credit Boid/Chalmers Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.