| Power abd Energy Engineering |
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| Experimental study on catalytic co pyrolysis of corn stalk and polypropylene |
| SONG Zu wei, ZHONG Zhao ping, ZHANG Bo, Lv Zi ting, DING Kuan |
| Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China |
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Abstract A horizontal tubular reactor was used to study the effects of temperature on polypropylene catalytic pyrolysis, of the mass ratio of corn stalk to polypropylene on product distribution and of coke deposited on catalyst. Results show that when the temperature of polypropylene catalytic pyrolysis is 550 ℃, the yield of pyrolysis oil reaches a maximum with no residue, and the products mainly consist of olefins and aromatic hydrocarbons. The addition of HZSM 5 increases the gasoline fractions (C6 C12) with the mass fraction of 93.39% at 600 ℃. Besides, the coke yield is less than 1% under all the temperature conditions. There is synergistic effect in the co pyrolysis process between corn stalk and polypropylene. Mass ratio of 1∶1 is the demarcating point in terms of different product distributions. Specifically, hydrocarbons domain the pyrolytic products when mass ratio is more that 1∶1, while oxygenated compounds are most abundant in pyrolytic products when mass ratio is tess than 1:1. Coke yield is negatively associated with H/C of the raw materials. The mass ratio of 1∶1 achieves a better result with the negative components content of 6.49%, the yield of hydrocarbons of 71.7% and the coke yield of 1.92%.
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Published: 01 February 2016
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玉米秸秆和聚丙烯共催化热解试验
采用管式炉试验装置研究温度对聚丙烯催化热解、不同聚丙烯与玉米秸秆质量比对热解产物和催化剂结焦的影响.结果表明：在聚丙烯单独催化热解温度为550 ℃时,热解油产率最大、残渣率为0,产物主要为烯烃和芳香烃.HZSM 5使得汽油馏分增加,产物轻质化,当温度为600 ℃时,汽油馏分（C6~C12）质量分数达到93%~39 %,不同温度下催化剂结焦率均小于1 %.聚丙烯和玉米秸秆共催化时存在协同作用,热解产物以质量比1∶1为分界点,质量比大于1∶1,具有烃类产物分布,当质量比小于1∶1时,热解产物为含氧有机物,催化剂结焦量与原料的有效氢碳比具有负相关关系.当共催化质量比为1∶1时,热解油有害组分仅6.49 %,烃类产率达71.7 %,催化剂结焦率为1.92 %.
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