Solar Thermal Production of Hydrogen Using Alumina Supported Ferrites: Thermodynamic Evaluation and On-Sun Validation

International Congress on Energy 2011
2011 AIChE Annual Meeting
AIChE Annual Meeting
October 17, 2011 - 8:00pm

Alumina supports were coated with CoFe2O4 using an alternating atomic layer deposition process. Nano-powder and hollow skeletal shells were used as supports. Large, high surface area polymer particles (~600µm, 43.5 m2/g) have been coated via ALD with several layers of alumina. The alumina layers were applied using TMA/water ALD chemistry. The particles were then heated to 800°C in air to burn out the polymer substrate. Thermodynamic modeling of the particles shows the creation of a hercynite/spinel phase that is capable of being cycled with water to produce hydrogen. The process requires reduction temperatures several hundred degrees below those of conventional ferrites supported on inert materials. Cycling has been completed on-sun at the National Renewable Energy Laboratory in Golden, CO. Powders were housed in a prototype concentrated solar reactor and subjected to cycling. Hydrogen production was quantified using a mass spectrometer. Results were used to estimate solar to hydrogen efficiency of the prototype reactor.
Professional Development Hours
0.5 PDHs
You will be able to download and print a certificate for these PDH credits once the content has been viewed. If you have already viewed this content, please click here to login.

Would you like to access this content?

No problem. You just have to complete the following steps.

You have completed 0 of 2 steps.

  1. Log in

    You must be logged in to view this content. Log in now.

  2. Purchase Technical Presentation

    You must purchase this technical presentation using one of the options below.
    If you already purchased this content recently, please click here to refresh the system's record of ownerships.


Credits 0.5 Use credits
List Price $25.00 Buy now
AIChE Members $15.00 Buy now
AIChE Undergraduate Student Members Free Free access
AIChE Graduate Student Members Free Free access
Related Topics: