Gasification process combined with steam methane reforming to pr

Chemistry: fischer-tropsch processes; or purification or recover – With preliminary reaction to form hydrogen or a carbon oxide – Gaseous oxygen utilized in the preliminary reaction

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252373, 518702, 518700, C07C 2706, C07C 3104

Patent

active

054968593

ABSTRACT:
An improved method for the production of stoichiometric ratioed syngas comprises partially oxidizing a gaseous feedstock containing substantial amounts of methane in a gasifier to produce a hot synthesis gas stream that is passed in indirect heat exchange through a steam reforming catalytic reactor. A portion of the steam reforming reaction products are mixed with the cooled gasifier synthesis gas stream exiting the steam reforming catalytic reactor to form a combined synthesis gas stream, called a "stoichiometric ratioed synthesis gas." The stoichiometric ratioed synthesis gas stream can then be passed into a methanol synthesis unit at substantially the specifications for optimal methanol production with little or no external compression. In a second embodiment the gasifier unit is arranged and operated in parallel with a primary steam reformer unit. The respective synthesis gas streams exiting each unit are combined to form a combined synthesis gas stream that undergoes oxidation in a secondary catalytic reformer unit to form a stoichiometric ratioed synthesis gas that requires minimal external compression before being converted to methanol.

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patent: 4910228 (1990-03-01), Lywood
patent: 4927857 (1990-05-01), MaShea, II
patent: 5252609 (1993-10-01), Pinto
patent: 5312843 (1994-05-01), Yamauch et al.
patent: 5431855 (1995-07-01), Green et al.

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