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改性β型分子筛的NMR研究
NMR Studies on Modified Zeoliteβ
【作者】 刘载维; 陈铁红; 郭振亚; 王敬中; 丁大同; 李赫咺; 邓风; 杜有如;
【Author】 Liu Zaiwei Chen Tiehong Gun Zhenya Wang Jingzhong DingDatong Li Hexuan( Nankai Univ.,Tianjin,300071) Deng Feng Du Youru(Wuhan Inst.of Phys.,Wahan,430071)
【摘要】 <正>1.引言:β型分子筛具有大孔径,高硅铝比,晶粒细的特点,在某些催化反应中,与其它分子筛相比较有优异的催化性能;它由三种不同晶系组成,每种晶系有多个不等价T位,由此引起诸多因素的复杂化.本文对不同改性处理的β分子筛进行了NMR考察.
【Abstract】 27Al MAS NMR was used to study modified zeoliteβ.The properties of calcined and steamed samples were compared.A shoulder peak near 53ppm was found,and it decreased with temperature of calcination or steam treatment.There was no 30ppm signal in calcined samples,and weak 30ppm signal appeared in steamed samples.The relationship between enchanc acid sites and 30ppm signal needed to study further.
- 【会议录名称】 第八届全国波谱学学术会议论文摘要集
- 【会议名称】第八届全国波谱学学术会议
- 【会议时间】1994-10
- 【会议地点】中国浙江杭州
- 【分类号】O643.36
- 【主办单位】中国物理学会波谱学专业委员会(Committee of the Magnetic Resonance Spectroscopy Chinese Physical Society)