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OALib Journal期刊
ISSN: 2333-9721
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zn-p复合改性hzsm-5在线催化热解获取生物油的研究
, PP. 567-574
Keywords: hzsm-5分子筛,改性,生物油,催化提质
Abstract:
？为进一步提高精制生物油的制取效率和燃料品质,采用zn和p对hzsm-5分子筛进行复合改性,使用xrd、semeds、icp-aes、bet等方法表征改性hzsm-5分子筛,考察了zn、p改性对精制生物油理化特性和液相产物的化学组成以及对hzsm-5抗结焦性能的影响。结果表明,zn、p在hzsm-5表面负载均匀,zn、p改性未影响hzsm-5的晶体骨架结构,改性hzsm-5的比表面积随着zn负载量的上升而减少;zn负载量为3%时,催化热解得到的精制生物油含氧量为10.67%,热值为36.76mj/kg,ph值为5.85,精制生物油品质得到显著提升;液相产物中酸类、醛类和酮类等不期望物质相对含量显著下降,芳香族化合物相对含量显著增加,芳香族化合物相对含量为91.93%,其中,芳香烃为74.63%;hzsm-5因负载p使得其相对结焦量明显降低,显著增强了hzsm-5的稳定性;zn改性促进了氢原子转移和碳正离子的形成,有利于提高hzsm-5分子筛的芳构化性能。
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