以水合Al2O3为基体合成MCM-41/γ-Al2O3复合材料

被引:3
作者
黄伟莉
刘百军
孙发民
张志华
鲍晓军
机构
[1] 中国石油大学中国石油天然气集团公司催化重点实验室
[2] 中国石油天然气股份有限公司大庆石化分公司研究院
[3] 中国石油大学中国石油天然气集团公司催化重点实验室 北京
[4] 北京
[5] 黑龙江大庆
关键词
MCM-41/γ-Al2O3复合材料; 原位合成; 热稳定性;
D O I
暂无
中图分类号
TB332 [非金属复合材料];
学科分类号
0805 ; 080502 ;
摘要
以γ-Al2O3的水合产物薄水铝石为基体,以十六烷基三甲基溴化铵(CTMABr)为模板剂,以水玻璃为硅源,采用原位合成方法水热制备了高热稳定性的MCM-41/γ-Al2O3复合材料。考察了γ-Al2O3的水合时间、水合温度和MCM-41合成母液的pH值、晶化温度等对复合材料中MCM-41性质的影响。对γ-Al2O3的水合产物和复合材料进行了X射线衍射(XRD)、扫描电子显微镜(SEM)和低温N2吸附表征。结果表明,提高水合温度或延长水合时间,γ-Al2O3逐渐水合为尺寸均一的条状薄水铝石,且其孔径增大;以薄水铝石为基体合成的MCM-41/γ-Al2O3复合材料中MCM-41的相对结晶度增加,热稳定性显著改善;MCM-41/γ-Al2O3复合材料较佳的合成条件为:γ-Al2O3的水合时间24h,水合温度150℃,合成母液的pH值11.0,晶化温度150℃。薄水铝石在合成母液中的溶解性是影响复合材料中MCM-41性能的主要因素。
引用
收藏
页码:54 / 60
页数:7
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