| 摘要 |
A method is provided for separating methane from carbon dioxide contained in a high pressure gas which comprises expanding the high pressure gas through a flow channel having a convergent section followed by a divergent section with an intervening throat which functions as an aerodynamic expander to obtain a gaseous stream enriched in methane and a heavy stream comprised enriched in carbon dioxide, hydrogen sulfide, ethane and heavier components. Generally, the flow channel is operated at temperatures low enough to result in the formation of solid carbon dioxide and solid hydrogen sulfide particles, which increases the efficiency of carbon dioxide and hydrogen sulfide removal. |
