Understanding the release behavior of biomass model components and coal in the co-pyrolysis process

The release behavior of biomass model compounds, coal and their mixtures in the co-pyrolysis process were investigated. The microcrystalline cellulose (MC) and lignin were chosen as model compounds of biomass. Thermal-mass spectrometer (TG-MS) was used to inspect the release characteristics of small molecules in the heating process. The release curves of biomass model compounds and coal mixtures in co-pyrolysis process are similar to that in the separate pyrolysis process. More H2O are produced in the pyrolysis process of microcrystalline cellulose. In addition, more H-2, CH4, CO and CO2 are produced during the pyrolysis process of lignin. Compared with microcrystalline cellulose and lignin, the contents of aromatic compounds in Shenfu coal are higher. For the CH4 and CO2 produced in co-pyrolysis process, the experimental values are slightly higher than the calculated values.