abstract |
The present invention relates to a method and apparatus for use in separating a gas mixture in a separation apparatus. Feed gas 18 is fed to compression systems 6 and 16 and then to the separation unit. The first auxiliary stream 91, 92 comprising approximately the composition of the first product stream or the composition of the feed gas when the compression system 6, 16 of the first feed gas compressor 6 fails completely or partially. This is compressed to at least the first pressure (78, 79) and returned to the separation device. |