Split stream methanation process
US4235044A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1978 |
| Grant date | Nov 25, 1980 |
| Priority date | — |
| Expiry date | Dec 21, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C1/0485
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A synthesis gas stream having a H.sub.2 /CO ratio of less than 3/1 is split, with one stream being subjected to water gas shift essentially to completion, adjusted with a portion of the other stream to a carbon monoxide content of about 3-6% by volume, and reacted in an adiabatic methanation zone. The high hydrogen composition and high H.sub.2 /CO ratio of the stream passed to the adiabatic zone is effectively regulated in this manner, preventing carbon formation and catalyst sintering. The effluent from said adiabatic zone is mixed with the remaining portion of the other stream and passed to an isothermal methanation zone. Carbon dioxide can be removed from the product methane-rich gas or from the methanation feed gas. In preferred embodiment, high pressure superheated steam is simultaneously produced by utilization of the heat of reaction of the methanation operations, enhancing the overall efficiency of the synthesis gas production-methanation operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.