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脱铝超稳Y沸石的SiO₂/Al₂O₃比与催化性能的研究

Studies on SiO₂/Al₂O₃ and catalytic performance of dealuminated usy catalyst

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【Author】 GUO Jian ping 1,ZHANG Shang 2,YIN Du lin 2 (1.Department of Chemistry,Loudi Teacher’s College,Loudi 417000,China; 2.Institute of Fine Catalysis and Synthesis,Hunan Normal University,Changsha 410081,China)

【机构】娄底师范专科学校化学系；湖南师范大学精细催化合成研究所；湖南师范大学精细催化合成研究所湖南娄底417000；湖南长沙410081；湖南长沙410081；

【Abstract】 The effective B acid amount of dealuminated USY(DUSY) zeolites with different silica/alumina ratios were measured by UV spectrometry with 2,6 dimethyl pyridine as adsorbentes in the presence of cyclohexane or anhydrous ethanol or tetrahydrofuran.The isomerization of α pinene was used to check the acidic catalytic properties of these zeolites.The results indicate that effective B acid amount of DUSY measured in polar anhydrous ethanol or tetrahydrofuran is lower than that of non polar cyclohexane.The effect of solution concentration of effective B acid amount of DUSY zeolites is small.As the silica/alumina ratio of catalyst increases,effective B acid amount and conversion of isomerization of α pinene all raise.更多还原