纳米β分子筛的制备及其性质研究
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- 英文论文题名：Preparation of nano-β zeolites and studies on its properties
- 论文作者：王迎运 ; 周亚松 ; 魏强 ; 周文武 ; 张玲玲 ; 张亚男 ; 李彤 ; 米卡尼沙
- 英文论文作者：Yingyun Wang ; Yasong Zhou ; Qiang Wei ; Wenwu Zhou ; Lingling Zhang ; Yanan Zhang ; Tong Li ; Mikanisha ; Chemical engineering institute ; China university of petroleum(Beijing)
- 年：2016
- 作者机构：中国石油大学(北京)化学工程学院;
- 论文关键词：β分子筛 ; 纳米颗粒 ; 制备方法 ; 理化性质
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十二分会： 多孔功能材料
- 语种：中文
- 分类号：O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十二分会 ; 多孔功能材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：439k
- 原文格式：D
- 会议级别：全国
摘要
β分子筛具有独特的拓扑结构,较大的孔径和较高的硅铝比,在石油馏分催化剂中有着广泛的应用。其中,β分子筛的粒径是影响催化剂性能的重要因素。降低β分子筛粒径,可有效缩短反应物及产物分子的扩散路径,避免过度裂化,提高反应产物的选择性。获得定向制备不同粒径β分子筛的合成条件、了解粒径变化对分子筛性质及催化剂性能的影响十分必要。本文首先采用添加晶种法,通过加入有机质抑制晶核生长和分步晶化方法,成功制备了粒径由1000nm到80nm的不同粒径β分子筛。通过考察晶种加入量和加入时间、有机质的种类与加入量及加入方式、分步晶化条件对分子筛粒径及结晶度的影响,优化出了高结晶度、纳米β分子筛的合成条件:在分子筛母液形成初期加入8%(与硅源质量比)晶种,在分子筛母液晶化24h后加入有机质乙二醇,低温晶化时间与高温晶化时间比为3/2。所得纳米β分子筛产生了一定比例的介孔表面积与孔容,且中强酸强度显著提高。基于纳米β分子筛制备的加氢裂化催化剂的中间馏分油的收率及异构化选择性显著优于常规β分子筛催化剂。
Beta zeolites with different partical sizes from 1000 nm to 80 nm had been prepared successfully,by using the methods of adding seeds,organic materials and crystallization with low-high temperature.We had also researched on the effects of the amount and time of seeds,type,amount and time of the organic materials,and proportion of the low and high crystal temperature on the partical size and crystalline.The nano-β zeolites produced certain proportion of mesoporous surface area and pore volume,and its strength of medium-strong acid was improved significantly.The yield of middle distillate and isomerization selectivity with nano-β are much higher than that with regular beta zeolites.
Beta zeolites with different partical sizes from 1000 nm to 80 nm had been prepared successfully,by using the methods of adding seeds,organic materials and crystallization with low-high temperature.We had also researched on the effects of the amount and time of seeds,type,amount and time of the organic materials,and proportion of the low and high crystal temperature on the partical size and crystalline.The nano-β zeolites produced certain proportion of mesoporous surface area and pore volume,and its strength of medium-strong acid was improved significantly.The yield of middle distillate and isomerization selectivity with nano-β are much higher than that with regular beta zeolites.
引文
[1]Tarach,K.;Gora-Marek,K.;Tekla,J.;Brylewska,K.Journal of Catalysis.2014,312:46-57.
[2]Zheng,X.;Fu,W.;Xiong,J.;Xi,J.Catalysis Today.2016,264:152-157.
[3]Cynthia,V.;Mert,K.;Myrjam,M.;Sara,B.Microporous and Mesoporous Materials.2014,185:204-212.
[2]Zheng,X.;Fu,W.;Xiong,J.;Xi,J.Catalysis Today.2016,264:152-157.
[3]Cynthia,V.;Mert,K.;Myrjam,M.;Sara,B.Microporous and Mesoporous Materials.2014,185:204-212.