Conceptual Design of a Floating Methanol Production Unit
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Several configurations for synthesis gas production and methanol synthesis have been considered and simulated using the simulation tool Honeywell UniSim Design R400 and MATLAB. It was decided to use a process without recycle with a gas heated reformer for synthesis gas production and a low pressure methanol synthesis technology. The set up maximizing methanol production was to use flue gas as heating medium in the gas heated reformer followed by a secondary ATR. A daily production of 1479 MTPD methanol was obtained from a feed of 50 MMSCFD. The carbon efficiency of the plant was 64% using a series of four reactors, with a conversion of CO of 80%. An economical evaluation was performed. This showed that it was economical to perform distillation at the site.