采用浸溃-沉淀法在具有较大比表面积的Al2O3上直接合成纳米ZrO2制备负载型纳米ZrO2/Al2O3复合载体,并将氧化钪、氧化钕、氧化错等稀土氧化物(RExOy)分别掺杂到负载型纳米ZrO2/Al2O3复合载体中以改善ZrO2的表面性能.同时以此复合载体负载SO42-制备SO42-/RExOy-ZrO2/Al2O3催化剂.运用XRD,BET,NH3-TPD,原位红外等技术与方法对催化剂的晶相结构、比表面积、孔径分布、酸中心种类等进行表征,并以α-蒎烯异构化反应为探针考察了催化剂的催化性能.结果表明,掺杂的稀土氧化物没有改变ZrO2的晶相结构,但ZrO2粒度有所减小,催化剂的比表面积增加,同时稀土氧化物的存在还会改变催化剂表面SO42-的配位方式,提高表面酸中心数和酸强度,增强催化剂的活性.催化剂的孔结构对选择性有较大的影响.
参考文献
| [1] | Comelli N A;Ponzi E N;Ponzi M I .α-pinene isometization to camphene-Effect of thermal treatment on sulfated zirconia[J].CHEMICAL ENGINEERING JOURNAL,2006,117(02):93. |
| [2] | Yadav M K;Chudasama C D;Jasra R V .Isomerisation of α-pinone using modified montmorillonite clays[J].Journal of Molecular Catalysis A:Chemical,2004,216(01):51. |
| [3] | L6pez C M;Machado F J;Rodriguez K;Mendez B Haaegawa M Pekerar S .Selective liquid-phase transformation of α-pincne over dealuminated mordenites and Y-zeolites[J].Applied Catalysis A:General,1998,173(01):75. |
| [4] | 罗金岳,倪传根,王志国,安鑫南.固体超强酸SO2-4/ZrO2催化α-蒎烯异构反应[J].南京林业大学学报(自然科学版),2004(03):51-54. |
| [5] | 王亚明,谢惠定,黄伟莉.固体超强酸SO2-4/ZrO2催化α-蒎烯异构化反应研究[J].林产化学与工业,2002(04):10-14. |
| [6] | Srinivasan R.;Ghenciu A.;Farcasiu D.;Davis BH.;Keogh RA. .REACTION OF BENZENE AND PYRIDINE ON METAL-PROMOTED SULFATED ZIRCONIA CATALYSTS[J].Journal of Catalysis,1996(2):502-510. |
| [7] | Srinivasan R.;Davis BH.;Keogh RA. .ACTIVATION AND CHARACTERIZATION OF FE-MN-SO(4)(2-)/ZRO2 CATALYSTS[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,1995(2):135-155. |
| [8] | Olindo R;Goeppert A;Habermacher D;Sommer J Pinna F .New methods for quantitative determination of brФnsted acid sites on solid acids:applicability and limits for Al2O3-promotod SO42-/ZrO2 catalysts[J].Journal of Catalysis,2001,197(02):344. |
| [9] | Hua W;Goeppert A;Sommer J .H/D exchange and isomefization of small alkanes over unpromoted and Al2O3-promotod SO24-/ZrO2 catalysts[J].Journal of Catalysis,2001,197(02):406. |
| [10] | SunY;Yuan L;MaS;HanY Zhao L Wang W Chen C Xiao F .Improved catalytic activity and stability of mesostructurod sulfated zirconia by AI promoter[J].Applied Catalysis A:General,2004,268(1-2):17. |
| [11] | 崔秀兰,郭福海,郭俊文,吴燕妮.新型稀土固体超强酸催化剂的制备及表征[J].中国稀土学报,2006(z1):53-57. |
| [12] | 吴燕妮,崔秀兰,郭海福.S2O82-/ZrO2-SiO2-Sm2O3固体超强酸催化剂的XPS研究[J].中国稀土学报,2003(z2):79-83. |
| [13] | 陈同云,古绪鹏,万玉保.制备条件及添加稀土对SO42- /ZrO2 -Al2O3固体超强酸酸性影响的研究[J].化学物理学报,2002(01):75-78. |
| [14] | 庞松,侯书恩,张涛,刘贺年.Y2O3和CeO2复合掺杂ZrO2纳米晶的制备与表征[J].中国稀土学报,2007(06):755-759. |
| [15] | Das D.;Mishra HK.;Parida KM.;Dalai AK. .Preparation, physico-chemical characterization and catalytic activity of sulphated ZrO2-TiO2 mixed oxides[J].Journal of molecular catalysis, A. Chemical,2002(2):271-282. |
| [16] | 辛勤.固体催化剂研究方法[M].北京:科学出版社,2004:361. |
| [17] | 邓国才.在La-TiO2催化剂上由苯酚直接氧化制取邻苯二酚的研究[J].中国稀土学报,1999(02):116. |
| [18] | 崔秀兰,郭海福,林明丽,郭俊文,吴燕妮.镧改性固体超强酸SO42-/ZrO2-TiO2/La3+催化剂的制备及性能研究[J].中国稀土学报,2003(04):460-464. |
| [19] | Clearfield A;Serrette G P D;Khazi-Syed A H .Nature ofhy drous zirconia and sulfated hydrous zirconia[J].Catalysis To day,1994,20(02):295. |
| [20] | 王亚明,杨显万.α-蒎烯择形催化异构研究[J].林产化学与工业,1999(03):1-6. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%