IWR分子筛脱锗补铝后处理  

Post-synthetic degermanation and alumination treatment of IWR zeolites

作　　者：付文华 袁志庆 FU Wenhua;YUAN Zhiqing(State Key Laboratory of Green Chemical Engineering and Industrial Catalysis,Sinopec Shanghai Research Institute of Petrochemical Technology Co.,Ltd.,Shanghai 201208,China)

机构地区：[1]中石化(上海)石油化工研究院有限公司绿色化工与工业催化全国重点实验室,上海201208

出　　处：《石油化工》2024年第9期1267-1273,共7页Petrochemical Technology

基　　金：国家自然科学基金项目(22272201,21802168);上海市启明星计划资助项目(23QB1406300)。

摘　　要：采用Al(NO_(3))_(3)和稀HNO_(3)溶液对硅锗铝IWR分子筛进行后处理,考察了处理液浓度、处理温度、处理时间对分子筛结构和性能的影响,采用XRD、SEM、NH_(3)-TPD、N_(2)吸附-脱附等方法对处理前后IWR分子筛进行表征。实验结果表明,在80℃下使用1 mol/L Al(NO_(3))_(3)和0.01 mol/L HNO_(3)处理可以较好地保留IWR分子筛的结晶度,同时大幅降低骨架锗含量、有效提升骨架铝含量。表征结果显示,经脱锗补铝后处理IWR分子筛具有更强的水热稳定性和酸性。A post-synthesis treatment of alumino-germano-silicate IWR zeolites by Al(NO_(3))_(3) and diluted HNO_(3) solution was presented.The effects of solution concentration,temperature,and duration of the treatment on the structure and performance of IWR zeolites were investigated.XRD,SEM,NH_(3)-TPD,and N2 adsorption-desorption were utilized to characterize IWR zeolites before and after treatment.The experimental results indicate that the treatment with 1 mol/L Al(NO_(3))_(3) and 0.01 mol/L HNO_(3) at 80℃ enables the preservation of crystallinity of IWR zeolites,dramatically reduces skeletal germanium content,and effectively promotes skeletal aluminum content.The characterization results demonstrate that the IWR zeolites after post-synthetic degermanation and alumination treatment have higher hydrothermal stability and stronger acidity.

关 键 词：脱锗 补铝 后处理 硅锗分子筛 IWR分子筛 水热稳定性 

分 类 号：TQ426.61[化学工程]