摘要
合成了晶粒大小不同的高硅ZSM-5沸石催化剂,采用X射线衍射仪(XRD)、电感耦合等离子体发射光谱仪(ICP)、吡啶红外光谱(Py-IR)、^(27)Al核磁共振仪(^(27)Al-NMR)和扫描电子显微镜(SEM)对催化剂进行了表征,并考察了甲醇分压和催化剂晶粒大小对甲醇制丙烯的影响。结果表明,甲醇分压越低,催化剂晶粒越小,丙烯收率和丙烯与乙烯质量收率比越高。在甲醇分压为0.01 MPa和470℃条件下,采用粒径为0.6μm的催化剂Z-0.6进行反应,丙烯的质量收率和丙烯与乙烯质量比分别为44.1%和8.8。
The ZSM-5 zeolites with different particle sizes were synthesized and characterized by X-ray diffraction （XRD）, pyridine adsorption infred （Py-IR） spectrometer, ^27Al-nuclei magnetic resonance （^27-Al NMR） and scanning electron microscopy （SEM）. The effects of the methanol partial pressure and the ZSM-5 zeolite particle size on the reaction of methal to propylene were investigated. The results showed that the propylene selectivity and mass fraction of propylene to ethylene （P/E） were higher with lower methanol partial pressure and smaller ZSM-5 particle size. The propylene yield and P/E were 44.1% and 8.8 respectively, over catalyst Z-0.6 with particle size 0. 6 μm at 470 ℃ under the methanol partial pressure 0.01 MPa.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2007年第6期481-486,共6页
Chemical Reaction Engineering and Technology
基金
国家重点基础研究规划(973计划
2003CB615801)
关键词
甲酵
丙烯
乙烯
沸石催化剂
反应选择性
methanol
propylene
ethylene
zeolite catalyst
reaction selectivity
