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添加氯化钠合成多级孔纳米ZSM5分子筛及其MTP催化性能

作者:时间:2019-03-01点击数:

PDF全文下载:  201901006.pdf

 

文章编号: 16726987201901003806 DOI 10.16351/j.16726987.2019.01.006

 

张洪菡, 张善鹤, 李春义*

(中国石油大学(华东) 重质油国家重点实验室,山东 青岛 266580

 

摘要: 极浓体系下,通过添加NaCl水热合成了一系列多级孔纳米ZSM5分子筛。所得分子筛通过X射线衍射仪(XRD)、低温氮气吸附仪、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和傅里叶红外光谱仪(FTIR)表征。结果表明:NaX能使纳米晶相互聚集,形成多级孔结构,其中NaCl实用性最强;n(NaCl)/n(SiO2)=0.1/1时,分子筛具有最大的比表面积和介孔量;晶化时间为8 h,可得到纯相高结晶度的ZSM5分子筛。将一定条件下制备的多级孔纳米NaClZSM5催化剂用于MTP(甲醇制丙烯)反应中,和常规多级孔纳米ZSM5催化剂相比,NaClZSM5具有更好的稳定性(1 250 min)和更高的丙烯碳基收率(质量分数36.5%)。

 

关键词: NaCl ZSM5 纳米; 多级孔; MTP中图分类号: O 611.4   文献标志码: A引用格式: 张洪菡, 张善鹤, 李春义. 添加氯化钠合成多级孔纳米ZSM5分子筛及其MTP催化性能\[J\]. 青岛科技大学学报(自然科学版), 2019 401): 3843.

 

ZHANG Honghan, ZHANG Shanhe, LI Chunyi. Synthesis of nanosized hierarchical ZSM5 zeolites with NaCl addition and their MTP catalysis properties\[J\]. Journal of Qingdao University of Science and TechnologyNatural Science Edition), 2019, 40(1) 3843.

 

Synthesis of Nanosized Hierarchical ZSM5 Zeolites with NaCl Addition and Their MTP Catalysis Properties

 

ZHANG Honghan, ZHANG Shanhe, LI Chunyi

(State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China)

 

Abstract: In extremely concentrated system, a series of hierarchical nanosized ZSM5 zeolites were synthesized with the addition of NaCl. The obtained samples were characterized by XRD, N2 adsorptiondesorption, SEM, TEM andPyFTIR. The results showed that the addition of NaXwas crucial to the formation of nanosized aggregates, and NaCl had the optimal practicability; the assynthesized zeolites hadthelarger surface area and mesopore volume when n(NaCl)/n(SiO2)=0.1/1. The high crystallinity ZSM5 zeolites were obtained when the time was 8 h. Compared with normal ZSM5 catalysts, the assynthesized ZSM5 catalysts had enhanced stability (1 250 min) and propylene yield (36.5%) in MTP reaction.

 

Key words: NaCl; ZSM5; nanosized; hierchical; MTP

 

收稿日期:  20171212

基金项目: 国家重点基础研究发展规划项目(2012CB215006).

作者简介: 张洪菡(1992—),女,硕士研究生.*通信联系人.

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