Process for producing a gas which can be substituted for natural gas
US4061475A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1977 |
| Grant date | Dec 6, 1977 |
| Priority date | — |
| Expiry date | Feb 28, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L3/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A high methane gas which can be substituted for natural gas is produced from a primary gas made by the gasification of coal, tar, or heavy residual oil under superatmospheric pressures. The primary gas is purified to remove catalyst poisons and is scrubbed to remove carbon dioxide to a residual content below 2% by volume. The water vapor to carbon monoxide volume ratio of the scrubbed gas is adjusted to 0.55 : 1 to 1 : 1 and is then passed through a reaction zone containing a shift conversion catalyst and a methanation catalyst in a volume ratio of approximately 1 : 4 to 1 : 10. The scrubbed gas entering the reaction zone enters the reaction zone at a temperature of 300.degree.-500.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.