| 离子交换法合成L/MCM-41复合分子筛 |
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| 引用本文： | 卫冬燕,王春芳,陈宜俍,徐军,郭士岭,詹予忠,阎立军,潘晖华.离子交换法合成L/MCM-41复合分子筛[J].郑州大学学报(工学版),2012,33(1):51-54. |
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| 作者姓名： | 卫冬燕 王春芳 陈宜俍 徐军 郭士岭 詹予忠 阎立军 潘晖华 |
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| 作者单位： | 1. 郑州大学化工与能源学院,河南郑州,450001
2. 中国石油天然气股份有限公司石油化工研究院催化材料研究室,北京,100195 |
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| 基金项目： | 河南省基础与前沿技术研究计划资助项目(82300420090) |
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| 摘 要： | 以十六烷基三甲基溴化铵(CTAB)为模板剂,分别采用包埋法和离子交换法,两步晶化都合成了L/MCM-41复合分子筛,并通过XRD、SEM、TEM和BET等测试手段对合成样品进行表征,检测结果表明用离子交换法合成的复合分子筛孔径为3.04 nm.与水热晶化法合成的MCM-41相比:(1)壁厚由0.55 nm增大到1.81 nm;(2)水热稳定性也明显提高,在100℃沸腾状态下结构保持时间由原来的低于2 h增大到8 h.与L沸石相比,K+含量降低为0.26%.
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| 关 键 词： | 离子交换 介微孔复合分子筛 L/MCM-41 |
Synthesis of Micro/meso-porous Composite Molecular Sieve L/MCM-41 with Ion Exchange |
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| WEI Dong-yan
,
WANG Chun-fang
,
CHEN Yi-liang
,
XU Jun
,
GUO Shi-ling
,
ZHAN Yu-zhong
,
YAN Li-jun
,
PAN Hui-hua.Synthesis of Micro/meso-porous Composite Molecular Sieve L/MCM-41 with Ion Exchange[J].Journal of Zhengzhou University: Eng Sci,2012,33(1):51-54. |
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| Authors: | WEI Dong-yan WANG Chun-fang CHEN Yi-liang XU Jun GUO Shi-ling ZHAN Yu-zhong YAN Li-jun PAN Hui-hua |
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| Affiliation: | 1.School of Chemical Engineering of Zhengzhou University,Zhengzhou 450001,China; 2.Petrochemical Research Institute Petrochina,Beijing 100195,China) |
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| Abstract: | Micro/meso-porous composite molecular sieve L/MCM-41 was synthesized with embedding method and ion exchange using cetyl trimethyl ammonium bromide(CTAB) as template and it was confirmed by being characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electronic microscopy(TEM) and N2 absorption/ desorption.The results indicated that the pore diameter of L/MCM-41 composite molecular sieve was 3.04 nm which was bigger than that of microporous molecular sieves.Compared with MCM-41 molecular sieve synthesized by ordinary hydrothermal method: 1)the pore wall thickness increased from 0.55 nm to 1.81 nm;2) The hydrothermal stability improved significantly,the structure could keep unchanged for 8h,rising by 6 h,at 100 ℃.Compared with zeolite L,the content of K+ decreased from 18.42% to 0.98%. |
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| Keywords: | ion exchange Meso/micro-porous composite molecular sieve L/MCM-41 |
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