具有管状镶嵌结构L/EU-1复合分子筛的合成及表征  

Synthesis and Characterization of L/EU-1 Composite Zeolites with the Tubular Mosaic Morphology

作　　者：马存存 胡丽[1] 杨冬花[1] 王杰[1] 吕爱凝 李建华[1] 李晓峰[1] 窦涛[2] MA Cun-cun Hu Li YANG Dong-hua WANG Jie LV Ai-ning LI Jian-hua LI Xiao-feng DOU Tao(College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China CNPC Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum （Beijing）, Beijing 102249, China)

机构地区：[1]太原理工大学化学化工学院,山西太原030024 [2]中国石油大学(北京)化工学院CNPC催化重点实验室,北京102249

出　　处：《分子催化》2017年第1期82-91,共10页Journal of Molecular Catalysis(China)

基　　金：国家重点基础研究发展规划(973项目;2012CB215002);国家自然科学基金(20973123);山西省自然科学基金(2013011041-1);山西省高等学校大学生创新创业训练项目~~

摘　　要：采用晶种法在极浓体系中,快速合成了L/EU-1复合分子筛,通过XRD、SEM、NH_3-TPD、TG-DTG等多种手段对其进行了表征.结果表明:随原始溶胶中添加硼和铁的质量分数的增加,复合分子筛中L分子筛的特征衍射峰分别向高角度和低角度方向发生偏移,L分子筛的晶胞参数和晶胞体积分别有所减小和增加;含硼和铁的L/EU-1复合分子筛尺寸大小长约为0.5~3μm,宽0.2~1μm,形貌为小颗粒聚集L分子筛附着生长管状镶嵌结构复合分子筛;镶嵌结构改变了复合分子筛的酸性、稳定性和孔道性质.影响因素分析表明,碱硅比低时,K^+对促进钙霞石笼的形成起主导作用,碱硅比高时,K^+对溶胶的聚沉起主导作用.L/EU-1 composite zeolites were synthesized rapidly by the method of crystal seed in extremely dense system,the synthetic samples were characterized by XRD,SEM,NH3-TPD,TG-DTG and so on. The results showed that with increasing the mass fraction of boron and iron in the original sol,the characteristic diffraction peaks of L in the composite zeolites migrated to higher angle and lower angle direction,respectively. The cell parameters and cell volume of L zeolite were decreased and increased,respectively. L / EU-1 composite zeolites contains boron and iron 0.5 - 3 μm long,width of 0.2 - 1 μm and they have the characteristics of small particle aggregation L zeolite attachment growth with the tubular mosaic structure. The mosaic structure changed the acidity,stability and pore properties of the composite zeolites. When n（ K2O）/n（ SiO2） is low,K^＋ plays a leading role in promoting the formation of cancrinite cages. When n（ K2O） / n（ SiO2） is high,K^＋ plays a dominating role in coaglulation of sol.

关 键 词：极浓体系 L/EU-1 复合分子筛 表征 

分 类 号：O643.3[理学—物理化学]