塑料和木屑的共液化以及催化液化实验研究

CO-LIQUEFACTION AND CATALYTIC LIQUEFACTION OF PLASTIC AND SAWDUST

在温度为613～693K、压力为20～30MPa的条件下,以去离子水为溶剂在1L间歇式高压反应釜中对塑料和木屑进行共液化研究,实验考察了反应时间、溶剂填充率、温度、催化剂对液化行为的影响。结果表明:木屑的加入能降低塑料液化对高温的要求,共液化能获得较高的液化油收率。在未添加催化剂的情况下,共液化反应在653K的温度下油收率达最大值24.0%,转化率达83.5%,油的热值为44.6MJ/kg。催化剂的使用能降低反应所需要的温度并获得较高的液化油收率以及转化率。研究发现,HZSM-5分子筛的催化作用最为明显。

Co-liquefaction of plastic (HDPE) and sawdust in de-ioned water was studied in a 1 L stainless steel autoclave under the temperature of 613-693 K and the pressure of 20 to 30 MPa. The effect of reaction time, solvent fill rate, temperature and catalysts on oil yield and conversion were investigated. The results indicate that co-liquefaction of HDPE and sawdust can lead to higher yield of oil, sawdust can reduce the temperature of HDPE liquefaction. Without catalyst, the most oil yield is obtained at supercritical state that the temperature is 653 K, the most oil yield is 24.0% and the conversion comes to 83.5% with 44.6 MJ/kg oil heat value. Catalysts can degrade the rigorous condition like temperature as well as improve the oil yield and conversion, the research shows that HZSM-5 catalyst is better than other catalysts in this study.