CAJ | 학술논문

用固相离子交换和液相离子交换法制备了 CeY分子筛,利用 X射线衍射(XRD)、N2物理吸附脱附、电感耦合等离子原子发射光谱仪(ICP)等方法表征了吸附剂的物理性质,借助 NH3-TPD及吡啶-原位傅里叶变换红外(Py-FTIR)技术考察了吸附剂表面的酸度分布及酸类型。采用固定床动态吸附实验和色谱-硫化学发光检测(GC-SCD)偶联技术系统考查了改性 Y分子筛对加氢脱硫燃料油的吸附脱硫性能。结果表明,4种 Y分子筛对加氢脱硫油脱硫能力大小顺序为 S-CeY>L-CeY>NaY>HY。表面酸性的差异显著地影响分子筛的吸附脱硫性能,两种方法制备的CeY分子筛表面酸性与 NaY原粉差异较大,分子筛表面B酸中心是噻吩发生催化反应的活性中心。
용고상리자교환화액상리자교환법제비료 CeY분자사,이용 X사선연사(XRD)、N2물리흡부탈부、전감우합등리자원자발사광보의(ICP)등방법표정료흡부제적물이성질,차조 NH3-TPD급필정-원위부리협변환홍외(Py-FTIR)기술고찰료흡부제표면적산도분포급산류형。채용고정상동태흡부실험화색보-류화학발광검측(GC-SCD)우련기술계통고사료개성 Y분자사대가경탈류연료유적흡부탈류성능。결과표명,4충 Y분자사대가경탈류유탈류능력대소순서위 S-CeY>L-CeY>NaY>HY。표면산성적차이현저지영향분자사적흡부탈류성능,량충방법제비적CeY분자사표면산성여 NaY원분차이교대,분자사표면B산중심시새분발생최화반응적활성중심。
CeY zeolites were prepared by liquid phase ion exchange (LPIE)and solid state ion exchange (SSIE).The adsorbents were characterized by means of XRD,N2 physisorption,ICP and the total surface acidity of the adsorbents was monitored by NH3-TPD and in situ FTIR spectroscopy using pyridine as a probe.Properties of selective adsorptive desulfurization of HDS gasolines on the adsorbents have been investigated in this paper by using a fixed-bed adsorber and a GC-SCD technique.The adsorption capacity was found to follow the order of S-CeY>L-CeY>NaY>HY.After LPIE and SSIE, and CeY zeolites had different surface acidity from NaY and HY,which greatly affected the adsorption desulfurization process. Additionally,Br?nsted (B)acid sites was thought toresult in catalytic reaction of thiophene.