Production of substitute natural gas
US4133825A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1977 |
| Grant date | Jan 9, 1979 |
| Priority date | — |
| Expiry date | May 11, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10K3/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Synthesis gases containing carbon monoxide, eg above 40% volume, and hydrogen are methanated to produce substitute natural gas, after CO.sub.2 removal, wherein the synthesis gas is simultaneously saturated with water, further heated and divided into first and second feed gas streams. The first feed gas stream is catalytically methanated at a temperature of from 250 to 550.degree. C, and the reaction product mixed with said second feed gas stream. The mixture is methanated over a second catalyst at a temperature of from 250 to 550.degree. C and the product is divided into a second product gas stream and a recycle gas stream and the recycle gas stream is admixed with the first feed gas stream, prior to the first catalytic methanation. The second product gas stream is subjected to a carbon dioxide removal process to produce SNG.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.