一种催化新材料的孔结构与反应性能关联研究

Study on the relationship between pore structure and catalytic behaviors of a new catalytic material

在实验室研究了山西金洋土合成复合新型催化剂材料,并将其改性制成催化剂。在小型固定流化床装置上进行反应,采用XRD、静态N2物理吸附法和热解吸色谱法等对催化剂进行表征。结果表明,山西金洋土在原位晶化体系中具有适度活性硅和较快活性铝的碱溶速率,有良好的晶化性能和裂化性能。经过水热处理和化学改性,形成了一定活性的中孔结构,设计的新型重油裂化催化剂具有较好的重油转化能力和良好的裂化产物选择性。

Properties of Shanxi Jinyang kaolin and FCC catalyst prepared via its in-situ crystallization were studied. The catalytic cracking reaction was carried out in a small fixed fluidized bed reactor. The catalyst was characterized by XRD, N2 adsorption-desorption isotherms and thermal desorption gas chromatography. The results showed that Shanxi Jinyang kaolin, with appropriate active silica and rapid alkaline dissolution rate for active alumina, was an suitable material for preparation of FCC catalyst by in-situ crystallization. Mesoporous structure formed after hydrothermal treatment and chemical modification of kaolin. The FCC catalyst containing the catalytic material exhibited excellent heavy oil cracking capability and superior selectivity to desired products.