Patent
Gasification of solid carbonaceous fuels - slurried in liquid carbon dioxide, by continuous partial oxidation
Peter L Paull,Warren G Schlinger +1 more
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TLDR
In this paper, a mixture of liquid CO2 and a solid particulate carbonaceous fuel at between -69 and + 80 degrees F and at a pressure between above the triple point pressure of the CO 2 and 1000 psig to produce an H2O-free slurry, was introduced, which served both as slurrying agent and temp. moderator.Abstract:
Synthesis or fuel gas mixts. (constituents CO, CO2, H2, H2O, CH4, H2S, COS, N2, A) are produced by (a) mixing liquid CO2 and a solid particulate carbonaceous fuel at between -69 and +80 degrees F and at a pressure between above the triple point pressure of the CO2 and 1000 psig to produce an H2O-free slurry, (b) introducing the slurry at between-69 and + 1200 degrees F and at 76-4500 psia simultaneously with an O2-contg. (>21 mole % O2) gas at 80-500 degrees F and 76-4500 psia into a free-flow noncatalytic gas generator and (c) carrying out partial oxidation of the mixt. at an autogenous temp. of 1200-3000 degrees F and 30-4400 psia. The liquid CO2 serves both as slurrying agent and temp. moderator. The process utilises low cost high-sulphur solid fuel feeds, reduces heat load and consequently oxygen requirements of the gas generator, eliminates heat exchanger fouling, avoids excessive duty and temp. degradation of recoverable heat when using a waste heat boiler, and reduces single-pass carbon waste.read more
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