Gas Characteristics of Pine Sawdust Catalyzed Pyrolysis by Additives

In order to effectively investigate the variation of gas production characteristics of biomass under normal-speed pyrolysis conditions, the gas production rate, gas production component yield and gas production calorific value of pine sawdust with adding Na2CO3, CaO and Fe2O3 were systematically analyzed. In the experiment, an improved tube furnace was used to research the pyrolysis process with the temperature from 350 degrees C to 750 degrees C. The results indicate that the gas yield rises with the increase of temperature without additives, reaching 19.59% at 750 degrees C. The liquid yield reaches 59.38% at 450 degrees C and then the yield change is small. CaO increases the calorific value of the pyrolysis product gas due to the adsorption of CO2. Na(2)CO(3)is fused with inorganic substances in the biomass to form a char skeleton structure. The effect of Fe(2)O(3)on H(2)is more obvious at higher temperature. Na(2)CO(3)has the most obvious effect on the pyrolysis of pine sawdust among the discussed additives, which effectively promotes the production of H-2.

Automated summary

The addition of different additives has various effects on the gas production characteristics of pine sawdust. Gas yield increases with temperature, while liquid yield is higher at lower temperatures and remains relatively stable. Among the additives, Na2CO3 has the most significant impact on hydrogen gas production.