Co-pyrolysis characteristics of biomass and polypropylene
To further understand the interaction in co-pyrolysis of biomass and waste plastics,the pyrolysis characteristics of poplar wood(PW)and the effect of polypropylene(PP)addition on the product distribution and composition of PW and PP co-pyrolysis were studied by thermogravimetric analysis and fixed bed reactor.The results showed that 500℃is the optimal temperature for PW pyrolysis to obtain tar product,and the maximum tar yield is 31.2%.The experimental value of the maximum weight loss rate of co-pyrolysis is slightly greater than the theoretical value in the low temperature range,and the peak temperature of the DTG curve in the high temperature range shifts to higher temperature zone.Co-pyrolysis of PW and PP has a positive synergistic effect on the generation of gas products,increasing the low heating value of gas products.Co-pyrolysis has a negative synergistic effect on the generation of tar.However,the oxygen-containing compounds(phenols,acids,ketones and furans)in tar decrease,and olefin compounds increase significantly.In addition,the degree of graphitization of co-pyrolytic char becomes higher.
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维普
