CO2 emission reduction is an important aspect of advanced coal chemical engineering. The 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 the adjustment of the H/C ratio of syngas. The feedstock methane can be obtained from several units of the lignite-pyrolysis-gasification-oil system. Through CH4 reforming

high ratio of H2/CO syngas can be obtained and applied into the oil production system

more carbon would be fixed into the product and less CO2 is thus emitted. Two reforming reactions

two methane sources and two types of gasifier

namely typical dry powder entrained-flow gasifier and coal-water slurry entrained-flow gasifier

were investigated in this work. Results showed that methane from pyrolysis and Fischer-Tropsch synthesis is deficient in adjusting H2/CO ratio in the syngas

and the water gas shift reaction is necessary for lignite to oil system. In terms of carbon conversion to oil

the dry powder gasification-CH4-H2O reforming is the better choice.