Exxonmobil Chemical Patents Inc.

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David B Spicer

Thomas T Hirst

James L Kendall

Steven M Slack

An H-rich fuel gas production plant comprising a syngas production unit can be advantageously integrated with an olefins production plant comprising a steam cracker in at least one of the following: (i) fuel gas supply and consumption; (ii) feed supply and consumption; and (iii) steam supply and consumption, to achieve considerable savings in capital and operational costs, enhanced energy efficiency, and reduced COemissions, compared to operating the plants separately.

Integration of hydrogen-rich fuel-gas production with olefins production plant

An H-rich fuel gas stream can be advantageously produced by reforming a hydrocarbon/steam mixture in to produce a reformed stream, followed by cooling the reformed stream in a waste-heat recovery unit to produce a high-pressure steam stream, shifting the cooled reformed stream a first shifted stream, cooling the first shifted stream, shifting the cooled first shifted stream to produce a second shifted stream, cooling the second shifted stream, abating water from the cooled second shifted stream to obtain a crude gas mixture stream comprising Hand CO, and recovering a COstream from the crude gas mixture stream. The H-rich stream can be advantageously combusted to provide thermal energy needed for residential, office, and/or industrial applications including in the H-rich fuel gas production process. The H-rich fuel gas production process can be advantageously integrated with an olefins production plant comprising a steam cracker.

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