Pyrolysis temperature

heating rate

alkali metal and alkaline earth metal (AAEM) species have significant effects on biomass pyrolysis. In this paper

by using the pyrolysis gas chromatography mass spectrometry (Py-GC/MS)

the effect of temperature and AAEM species on fast pyrolysis of the biomass tar was investigated. The influence of pyrolysis temperature and AAEM species on the pyrolysis characteristics of biomass (rice husk and sawdust

H-form rice husk and H-form sawdust) was analyzed by means of mass loss of samples. The online semi quantitative analysis of pyrolysis tar was carried out by gas chromatography mass spectrometry (GC/MS). The distribution of molecular weight of pyrolysis tar was discussed. The results showed that during fast pyrolysis of biomass

the removal of AAEM species reduced the mass loss rate. With increasing pyrolysis temperature in the range of 500-900℃

the tar composition of high molecular weight decreased gradually. The polymerization of the tar precursor was limited by the AAEM species and the formation of the heterocyclic carbon ring was further inhibited. The molecular weight of tar of rice husk pyrolysis was mainly distributed in the range of 110-129. The tar yield of sawdust fast pyrolysis was higher than that of rice husk. The molecular weight distribution of sawdust tar was wide

containing more substances with high molecular weight (150-209).