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Research Papers: Alternative Energy Sources

Magnesium Hydride Slurry: A Better Answer to Hydrogen Storage

[+] Author and Article Information
Andrew W. McClaine

Mem. ASME
Safe Hydrogen, LLC,
30 York Street,
Lexington, MA 02420
e-mail: AWMcClaine@SafeHydrogen.com

Kenneth Brown

Safe Hydrogen, LLC,
30 York Street,
Lexington, MA 02420
e-mail: KBrown@SafeHydrogen.com

Safe Hydrogen, LLC,
30 York Street,
Lexington, MA 02420
e-mail: DBowen@SafeHydrogen.com

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received April 23, 2014; final manuscript received April 10, 2015; published online May 19, 2015. Assoc. Editor: Abel Hernandez-Guerrero.

J. Energy Resour. Technol 137(6), 061201 (Nov 01, 2015) (9 pages) Paper No: JERT-14-1135; doi: 10.1115/1.4030398 History: Received April 23, 2014; Revised April 10, 2015; Online May 19, 2015

By storing hydrogen in an oil-based slurry with powdered magnesium hydride, inexpensive and safe hydrogen storage can be realized. This paper describes the characteristics and benefits of cycling hydrogen in and out of magnesium hydride slurry. An application of magnesium hydride slurry in a baseload wind power system is discussed. It concludes that a 150 MW baseload wind power system can produce an internal rate of return (IRR) of 10% with an electric price of $0.088/kWh. The costs and performance characteristics of this power plant are described.

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Figures

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Fig. 1

Two dehydride/hydride cycles of MgH2 slurry (4.074 gmmol MgH2)

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Fig. 2

Typical annual wind energy and its use

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Fig. 3

Wind power showing power decline as 3.8 days

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Fig. 4

Spot price of electricity

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Fig. 5

Wind power sold showing additional sold when spot price is high

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Fig. 6

Power to electrolyzers showing decline when wind power drops

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Fig. 7

Total power sold showing additional sold when spot price is high

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Fig. 8

Gas turbine generator power produced when wind power is low

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Fig. 9

Wind power spilled when wind power is higher than electrolyzer capacity

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Fig. 10

Hydrogen storage rises when wind power is high and falls when generator is operating

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Fig. 11

Sensitivity of IRR on electricity contract price

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