引用本文:徐国皓,余金鹏,徐华胜,尤雅芳,袁璋晶,潘淑倩,等. 混合碱处理HZSM-5分子筛及其催化丙烷脱氢反应性能[J]. 石油与天然气化工, 2019, 48(2): 57-62.
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混合碱处理HZSM-5分子筛及其催化丙烷脱氢反应性能
徐国皓1,余金鹏1,2,3,4,徐华胜1,2,3,4,尤雅芳1,袁璋晶1,潘淑倩1,王鹏飞1,2,3,4
1.上海化工研究院有限公司;2.上海绿强新材料有限公司 ;3.聚烯烃催化技术与高性能材料国家重点实验室;4.上海市聚烯烃催化技术重点实验室
摘要:
采用不同浓度比的四丙基氢氧化铵和乙酸钠混合碱(TPAOH/CH3COONa)溶液处理HZSM-5分子筛,对处理前后的HZSM-5分子筛负载Pt,制备Pt/HZSM-5催化剂用于丙烷脱氢反应。利用XRD、XRF、SEM、BET、NH3-TPD、H2化学吸附和TG等手段对处理前后的HZSM-5分子筛进行表征,考察了不同浓度比的混合碱溶液对HZSM-5分子筛的晶体结构、表面形貌、孔结构、表面酸性及丙烷脱氢性能的影响。结果 表明:混合碱溶液处理HZSM-5分子筛,能够形成微孔-介孔多级孔结构,并能调变分子筛的表面酸性；当TPAOH/CH3COONa浓度比为0.075时,丙烷初始转化率和丙烯选择性均达到最高值,分别为34.0%和99.1%。 
关键词:  混合碱  丙烷脱氢  HZSM-5  多级孔  Pt/HZSM-5
DOI：10.3969/j.issn.1007-3426.2019.02.010
分类号:
基金项目:上海市科技人才计划项目“选择性脱除中药重金属吸附剂的研究开发”(15XD1522300)
Treatment of HZSM-5 zeolite by mixed alkali and its catalytic performance for propane dehydrogenation
Xu Guohao1, Yu Jinpeng1,2,34, Xu Huasheng1,2,34, You Yafang1, Yuan Zhangjing1, Pan Shuqian1, Wang Pengfei1,2,3,4
1.Shanghai Research Institute of Chemical Industry Co., Ltd., Shanghai, China ;2. Shanghai Lüqiang New Materials Co., Ltd., Shanghai, China ;3. State Key Laboratory of Polyolefins and Catalysis, Shanghai, China ;4. Shanghai Key Laboratory of Catalysis Technology for Polyolefins, Shanghai, China
Abstract:
HZSM-5 zeolites were treated with different concentration ratios of tetrapropylammonium hydroxide and sodium acetate mixed alkaline (TPAOH/CH3COONa) solution, and Pt was loaded on HZSM-5 zeolites before and after treatment to prepare Pt/HZSM-5 catalyst for propane dehydrogenation. The HZSM-5 zeolites before and after treatment were characterized by XRD, XRF, SEM, BET, NH3-TPD, H2 chemisorption and TG. The effects of different concentration ratios of mixed alkaline solution on the crystal structure, surface morphology, pore structure, surface acidity and propane dehydrogenation of HZSM-5 zeolites were investigated. The results showed that the mixed alkaline solution treatment of HZSM-5 zeolites could form the micro-mesoporous hierarchical pore structure and modulate the surface acidity of the zeolite. When the concentration ratio of TPAOH/CH3COONa was 0.075, the initial propane conversion and the propene selectivity presented the best catalytic performance, which were 34.0% and 99.1%, respectively.
Key words:  mixed alkaline  propane dehydrogenation  HZSM-5  hierarchical pore  Pt/HZSM-5