Provided herein is a process for generating steam comprising supplying a first stream to a steam reformer to produce a second stream comprising essentially 100% steam such that the molecular composition of the first stream is identical to the molecular composition of second stream, wherein the steam reformer comprises a reformer inlet in fluid communication with a reformer outlet, and at least one tube arranged between, and in fluid communication with the reformer inlet and the reformer outlet; and wherein the at least one tube is in thermal communication with a furnace of the steam reformer. A steam reformer for producing steam is also disclosed.