摘要
分别以异丙胺和二甲胺为模板剂,通过控制合成配比和反应条件,合成了硅铝比相近、酸分布一致,但晶体形貌不同的ZSM-23分子筛.表征结果表明,以异丙胺为模板剂合成的ZSM-23具有长径比<5、纳米尺寸均一及外比表面积更高的特点.正十二烷异构化性能测试结果表明,具有短轴形貌的ZSM-23分子筛具有更高的异构烷烃选择性和产品收率,并在实际原油评价测试中取得了更好的降凝效果.润滑油基础油的收率及其低温流动性能得到进一步改善,并为加氢异构催化剂的研发提供了指导方向.
Rod-like ZSM-23 zeolites with different length / diameter values（ L / D） were synthesized using dimethylamine（ DMA） and isopropylamine（ IPA） as templates,respectively. The samples were characterized by means of XRD,SEM,XRF,N2 sorption and NH3-TPD. The crystals（ ZSM-23-IPA） shows special nanoscaled and uniformed morphology with L / D〈5,and more external surface areas by controlling the initial gel composition and hydrothermal reaction parameters. On n-dodecane hydroisomerization reaction,it also shows high conversion,selectivity and i-C12 yield,which is associated with the more exposed active sites. Furthermore,Pt-ZSM-23-IPA catalyst also shows very good performance on real crude oil test. It indicates that ZSM-23 catalyst with low L / D value would be applied in the future for improving the low-temperature fluidity of lubricant oil in industry.
作者
张瑀健
翟绪丽
付凯妹
姜涛
ZHANG Yujian ZHAI Xuli FU Kaimei JIANG Tao(College of Chemical Engineering ＆ Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China Petrochemical Research Institute of PetroChina, Beijing 100195, China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2017年第2期231-237,共7页
Chemical Journal of Chinese Universities
基金
天津市自然科学基金(批准号:16JCZDJC31600)~~
