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ZSM-35 沸石的合成及其催化裂解庚烷制烯烃
Synthesis of ZSM-35 zeolites and catalytic cracking of n-heptane to olefin
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- DOI:
- 作者:
- 张晓丹1，张永军2，韩洪晶1，张亚男1，王海英1，张加羽1，刘心雨1，陈彦广1?
Zhang Xiaodan 1, Zhang Yongjun 2, Han Hongjing 1, Zhang Yanan 1, Wang Haiying 1, Zhang Jiayu 1, Liu
- 作者单位:
- 1. 东北石油大学化学化工学院，黑龙江大庆163318；2. 中国石油石油化工研究院大庆化工研究中心，黑龙江大庆163714
1. College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, China; 2. Daqing Petrochemical Research Center, PetroChina Petrochemical Research Institute, Daqing 163000, China
- 关键词:
- ZSM-35 沸石；双模板剂；正庚烷；催化裂解；C2 =~C4 =
ZSM-35 zeolite; double template agent;n-heptane; catalytic cracking; C2=~C4=
- 摘要:
- 摘要：利用烷烃催化裂解制备轻烯烃的研究已取得显著进展，而提高轻烯烃产率和选择性仍
然存在挑战。文中采用水热合成方法以吡咯烷（PYR）和十六烷基三甲基溴化铵（CTAB）为双
模板剂制备了具有层状薄片堆叠构成的球形ZSM-35-0.01CTAB 分子筛。通过PYR 和CTAB
的相互作用，相对于母体ZSM - 35 催化剂，ZSM - 35 - 0.01CTAB 比表面积和孔体积分别由
309 m2/g 和0.19 m3/g 升至340 m2/g 和0.24 m3/g。在正庚烷催化裂解过程中，相比于ZSM-35 的
27.68% 和ZSM - 35 - 0.005CTAB 的32.19%，有促进中间体的传质，将C2= ~C4= 产率提升至37.05%。
新的合成策略为调节ZSM-35 沸石的形貌和尺寸提供了有效途径，并在烷烃裂解过程中提供了新的理论指导。
olefinremains a challenge.The spherical ZSM-35-0.01CTAB zeolites were prepared by hydrothermal synthesis using pyrrolidine
(PYR) and cetyltrimethyl ammonium bromide (CTAB) as double templates in this paper.The specific surface area and pore volume
of ZSM-35-0.01CTAB zeolite increased from 309 m2/g and 0.19 m3/g to 340 m2/g and 0.24 m3/g, respectively.Due to the interaction
between PYR and CTAB, which was conducive to the mass transfer of intermediates.Due to the interaction between PYR and CTAB,
it was beneficial to the mass transfer of intermediates. The yield of C2= ~C4= increased to 37.05% during the catalytic cracking of
n-heptane compared to ZSM-35 (27.68%) and ZSM-35-0.005CTAB (32.19%). This new synthesis strategy provided an effective
way to adjust the morphology and size of ZSM-35 zeolite and a new theoretical guidance in the process of alkane cracking.