METHOD FOR REMOVING AROMATIC HYDROCARBONS FROM COKE OVEN GAS HAVING BIODIESEL AS WASHING LIQUID AND DEVICE FOR CARRYING OUT SAID METHOD
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United States of America Patent
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Issued Date -
Jul 30, 2015
app pub date -
Jul 16, 2013
filing date -
Aug 9, 2012
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Abstract
The invention relates to a process for removing aromatic hydrocarbons from coke oven gas (COG), in which biodiesel is conveyed in a circuit as scrubbing liquid. The coke oven gas (COG) is brought into contact with the biodiesel in a first gas scrubbing stage to separate off aromatic hydrocarbons. The biodiesel enriched in aromatic hydrocarbons is then taken off from the first gas scrubbing stage, heated and regenerated by stripping with steam. The biodiesel which has been regenerated by stripping is then, after cooling, fed back into the first gas scrubbing stage. According to the invention, the coke oven gas (COG) purified in the first gas scrubbing stage is fed to a further, second gas scrubbing stage to which a more highly stripped substream of the biodiesel is fed as scrubbing liquid.
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