Impact of CO2 atmosphere on coal pyrolysis in indirectly heated fixed bed with internals

To clarify how CO2 affects pyrolysis characteristics in reactor with internals, pyrolysis of Yulin coal under N2 (inert) and CO2 (active) atmospheres is performed in fixed-bed reactors for two kinds of pyrolysis, i.e., with and without internals.CO2 exhibits different impact on tar yield for two types of pyrolysis, i.e., raising tar yield for pyrolysis in reactor without internals but lowering tar yield for that with internals. Tar yield pyrolysis under CO2 atmosphere is 6.31 wt% with internals, which is still higher 15.97% than that without internals at 1000 degrees C. In addition, CO2 atmosphere can produce more CO, high BET surface area char and high-quality of tar with more light tar (

Automated summary

The impact of CO2 on the pyrolysis characteristics in reactor with internals was studied by conducting pyrolysis experiments of Yulin coal under N2 (inert) and CO2 (active) atmospheres in fixed-bed reactors for two types of pyrolysis, with and without internals. It was found that CO2 exhibited different effects on tar yield for the two types of pyrolysis, raising tar yield for pyrolysis in reactor without internals but lowering tar yield for that with internals. The tar yield under CO2 atmosphere with internals was 6.31 wt%, which was still 15.97% higher than that without internals at 1000 degrees C.