Abstract
It is well known that metal hydrides can be used to compress hydrogen. In the present study, AB 5 type and AB 2 type multicomponent hydrogen storage alloys have been studied for the purpose of high-pressure hydrogen compression. A single stage metal hydride hydrogen compressor with hydrogen compression rate of 40 L/min and a double stage compressor with hydrogen compression rate of 20 L/min were designed and built to produce high-pressure hydrogen. The single-stage compressor produces high-pressure hydrogen around 45 MPa from 4 MPa feed gas, when hot oil at 170 ∘ C is used as the heat source. The double-stage compressor rather needs only hot water to produce 45 MPa hydrogen.
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