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| IIn the coal chemical field, CO2 emission reduction research is an important aspect. CH4-CO2 reforming is one of the important choices for CO2 cycling, while the CH4-H2O reforming is able to reduce the CO2 emission from the H2 production or adjustment units. And the feeding material methane can be obtained from many units of the lignite-pyrolysis-gasification-oil system. Therefore, by reforming, high H2/CO value syngas can be got and by adding the syngas to oil production system, more carbon is fixed into the product and less is emitted. Two reforming reactions, two methane sources and two types of gasifers namely typical dry powder entrained-flow gasifier and coal-water slurry entrained-flow gasifier are combined and compared. And the results show that methane from pyrolysis and FT synthesis is deficient in all cases to adjust the syngas proportion, which means the water gas shift unit is necessary for lignite to oil system. Results also show that in the view of carbon conversion to oil, the dry powder-CH4-H2O reforming strategy is the best. |
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| Keywords:methane reforming; lignite; pyrolysis; gasification; CO2 emission |
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