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Catalytic cracking of soybean oil by ZSM-5 zeolite-containing silica-aluminas with three layered micro-meso-meso-structure
Catalysis Today ( IF 5.3 ) Pub Date : 2017-09-21 , DOI: 10.1016/j.cattod.2017.09.033
Atsushi Ishihara , Takashi Tsukamoto , Tadanori Hashimoto , Hiroyuki Nasu

In order to convert a large molecule of soybean oil, ZSM-5 zeolite-containing silica-aluminas with three layered micro-meso-meso-structure were developed. In this method, zeolite-containing two layered silica-aluminas initially prepared were combined with silicas having very large mesopores prepared by the gel skeletal reinforcement. The three-layered structure was confirmed by pore size distribution derived from N2 adsorption and desorption measurements. The catalytic cracking of soybean oil using the three-layered catalysts was evaluated by the Curie point pyrolyzer method. When the reaction was performed at 500 °C, activities of catalysts having hierarchical structures were improved. It is thought that the diffusion of soybean oil molecule was promoted in the presence of large mesopores of the catalysts having hierarchical structure. ZSM-5 zeolite-containing catalysts showed very high research octane number (RON), compared with β zeolite and Y zeolite containing catalysts, indicating that ZSM zeolite-containing catalysts provided gasoline fractions of good quality. Gasoline yields increased with increasing conversion and was plotted on the same straight line when the same type of zeolite was used, indicating that the product selectivity would depend on the type of zeolite and that the activity would strongly depend on the existence of the matrix.



中文翻译:

具有三层微介观介观结构的含ZSM-5沸石的二氧化硅-氧化铝催化裂解大豆油

为了转化大分子大豆油,开发了具有三层微介观介观结构的含ZSM-5沸石的二氧化硅-氧化铝。在该方法中,将最初制备的含沸石的两层二氧化硅-氧化铝与通过凝胶骨架增强制备的具有非常大的中孔的二氧化硅混合。通过源自N 2的孔径分布来确认三层结构吸附和解吸测量。使用居里点热解器法评价了使用三层催化剂的大豆油的催化裂化。当反应在500℃下进行时,具有分级结构的催化剂的活性得到提高。据认为,在具有分级结构的催化剂的大的中孔的存在下,促进了大豆油分子的扩散。与含β沸石和Y沸石的催化剂相比,含ZSM-5沸石的催化剂显示出很高的研究辛烷值(RON),这表明含ZSM沸石的催化剂可提供高质量的汽油馏分。汽油收率随转化率的提高而增加,并且在使用相同类型的沸石时,其绘制在同一直线上,

更新日期:2017-09-21
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