| http://www.w3.org/ns/prov#value | - The thermal pretreatraent can remove species that are bound to the surface of the adsorbent particles, such as for example, carbon monoxide, carbon dioxide and water. [0042] In another embodiment, the adsorbent can be pretreated by heating to between about 400 0 C and about 600 0 C in a nitrogen atmos
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