prov:value
| - It is to be understood, however, that feedstocks typically useful in the practice of the invention will include lower alkanes such as methane, ethane or propane (i.e., C1 -C3 alkanes) either alone, separately or in mixtures with each other, with or without the presence of other materials, such as inert gases, e.g., N2 or minor amounts of other hydrocarbon materials, for example.
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