Hydrogen Production Via Two - Step High Temperature Thermochemical Process Using Porous MnFe2O4 Material

Wednesday, November 10, 2010: 4:05 PM
Alta Room (Marriott Downtown)
Michael K. Opoku, Rajesh Shende and Jan A. Puszynski, Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD

Porous MnFe2O4 material was synthesized and investigated as a potential candidate for thermochemical water splitting. The basic idea is that manganese-ferrite can split water molecules by extracting oxygen atoms and reversibly incorporating them into its lattices. MnFe2O4 was produced from manganese acetate, iron citrate, and sucrose precursors via a novel microwave assisted synthesis method which resulted in a pure crystalline material. DSC/TGA redox experiments indicated that synthesized MnFe2O4 can gain up to 3.34wt% in oxygen atmosphere at 850 oC and 1 atm. The results have also showed that these materials can be fully regenerated in nitrogen atmosphere at 950 oC and 1 atm. Based on the TGA analyses of oxidation and reduction in air and nitrogen respectively, it was estimated that 47.7 STPml/g-solid of H2 might be generated in each cycle. Hydrogen production in multiple cycles via a two-step thermochemical process using packed-bed reactor filled with porous MnFe2O4 material will be presented.  In addition, details of synthesis and characterization of this promising material will be presented.

Figure 1. Production rate of hydrogen at 800 oC and atmospheric pressure using porous MnFe2O4 material.

Figure 2. SEM image of synthesized MnFe2O4 materials.


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See more of this Session: Advances in Thermochemical Hydrogen Production
See more of this Group/Topical: Topical 8: Hydrogen Production and Storage