CAJ | 학술논문

以正己烷为原料，在连续流动常压反应装置上考察了稀土改性HZSM-5沸石催化剂的芳构化和裂解性能。用红外光谱， X射线衍射， X光电子能谱等研究了这些离子改性的沸石催化剂的表面性质，比较了机械混合法和浸渍法引入稀土对催化剂性能的影响。稀土可提高混合法制备的改性催化剂的芳构化性能， B酸中心是正己烷芳构化的活性中心， L酸中心则对正己烷的裂解起重要作用。
이정기완위원료，재련속류동상압반응장치상고찰료희토개성HZSM-5비석최화제적방구화화렬해성능。용홍외광보， X사선연사， X광전자능보등연구료저사리자개성적비석최화제적표면성질，비교료궤계혼합법화침지법인입희토대최화제성능적영향。희토가제고혼합법제비적개성최화제적방구화성능， B산중심시정기완방구화적활성중심， L산중심칙대정기완적렬해기중요작용。
The cracking and aromatization performances of HZSM-5 zeolite modified by rare earths were investigated by means of n-hexane continuous-flow microreactor and the surface property of these catalysts was also studied by IR (infrared spectra), XRD (X-ray diffraction), XPS (X-ray photoelectron spectrometry). The effects of catalyst preparation methods on the property and reaction performance were discussed. The experimental results show that the rare earths improve the aromatization performance of the catalysts prepared by mechanical mixing method. Brnsted acid site is the active centre of n-hexane aromatization, while Lewis acid site plays a role in n-hexane cracking.