生物质与废轮胎共热解及催化对热解油的影响

生物质稻壳与废轮胎以不同比例组成的均匀混合物在管式固定床内共热解，MCM-41和SBA-15作为催化剂，对产生的热解油性质进行了研究。结果表明，随着废轮胎在混合物中比例增加，热解油产率和热值在增加，而黏度和密度在降低。当稻壳占到60%（质量）时，热解液体产率为44.5%（质量），热解油热值为40 MJ·kg-1，热值与柴油接近;温度对热解油的产率和组分柠檬精油的生成影响较大。对组成一定的混合物，在热解温度500℃时二者均达到最大。通过对热解油主要组分柠檬精油和氧含量的分析说明，共热解过程中组分间可以产生一定的相互作用，并具有协同效果，体现在柠檬精油组分的含量低于加权后的浓度，氧含量大于加权后的数值;与没有催化剂存在情况相比，MCM-41和SBA-15的存在能显著降低热解液体的黏度和密度，其中，SBA-15的降低效果更为明显。

Influence of co-pyrolysis and catalysis of biomass with waste tire on pyrolytic oil properties

The properties of the oil obtained by co-pyrolyzing a mixture of rice husk biomass and waste tire in a tubular fixed-bed with MCM-41 and SBA-15 as catalysts were investigated with gas chromatography, elemental analyzer, viscometer and calorimeter.The results showed that the yield and heating value of the pyrolytic oil increased and its viscosity and density decreased as the percent of waste tire in the mixture was increased.Through pyrolyzing the mixture with rice husk accounting for 60%(mass), the liquid yield and heating value of the pyrolytic oil reached 44.5%(mass) and 40 MJ·kg-1 (approaching that of diesel)respectively.The temperature could obviously affect the yield of the pyrolytic oil and limonene content in the oil,both of which reached a maximum at 500℃.The limonene content was lower than that of the weighted value obtained through individual pyrolysis and the oxygen content was higher than that of the weighted value through individual pyrolysis.Through co-pyrolyzing the mixture of rice husk and waste tire, it was found that synergetic effect and interaction might take place for some components.Catalysts such as MCM-41 and SBA-15 greatly reduce the viscosity and density of the oil.Comparing with MCM-41, SBA-15 showed better catalytic effect than MCM-41. Comparing with the diesel(0#), the viscosity and density of the pyrolytic oil were slightly higher than those of diesel.