通过沉淀、回流和掺杂等方法制备了ZrO2呈四方相及单斜相的SO2-4/ZrO2(SZ),并用XRD,TEM,低温N2-BET和吡啶吸附IR等技术定量地测定和探讨了SZ的结构特征和表面超强酸性及其对丁烷异构化反应的催化活性. 结果表明,ZrO2呈单斜相结构的SZ表面Brnsted(B)酸与Lewis(L)酸的浓度比[B]/[L]较ZrO2以四方相为主的SZ高约40%,但其对丁烷异构化反应的比催化活性则较后者低约31%;由掺Mg2+所制备的ZrO2呈四方相的SMZ具有与ZrO2呈纯单斜相的SZ非常接近的[B]/[L]比,且表现出比未掺Mg2+的ZrO2以四方相为主的SZ更高的比催化活性. 从催化剂晶相结构对表面B酸浓度及强度影响的角度进行了讨论.
参考文献
| [1] | Song X;Sayari A .[J].Catalysis Review-Science and Engineering,1996,38(03):329. |
| [2] | Yadav G D;Nair J J .[J].Microporous and Mesoporous Materials,1999,33(1-3):1. |
| [3] | 高滋.ZrO2/SO42-超强酸体系形成过程的研究[J].高等学校化学学报,1992(12):1498-1502. |
| [4] | Morterra C.;Pinna F.;Signoretto M.;Cerrato G. .CRYSTAL PHASE, SPECTRAL FEATURES, AND CATALYTIC ACTIVITY OF SULFATE-DOPED ZIRCONIA SYSTEMS[J].Journal of Catalysis,1995(1):109-123. |
| [5] | Ward D A;Ko E I .[J].Journal of Catalysis,1995,157(02):321. |
| [6] | Stichert W.;Schuth F. .Synthesis of catalytically active high surface area monoclinic sulfated zirconia[J].Journal of Catalysis,1998(2):242-245. |
| [7] | 赵玉宝 .[D].南京:南京化工大学,1999. |
| [8] | Corma A;Fornés V;Juan-Rajadell M I .[J].Applied Catalysis A:General,1994(116):151. |
| [9] | Hughes T R;White H M .[J].Journal of Physical Chemistry,1967,71(07):2192. |
| [10] | Datka J .J Chem Soc[J].Faraday Transactions,1980,76(12):2437. |
| [11] | 吴恩源.FTIR研究不同硅铝比HZSM-5沸石的酸性质[J].高等学校化学学报,1991(04):436-440. |
| [12] | Datka J;Turek A M;Jehng J M;Wachs I E .[J].Journal of Catalysis,1992,135(01):186. |
| [13] | Emeis C A .[J].Journal of Catalysis,1993,141(02):347. |
| [14] | Anderson J A;Fergusson C;Rodriguez-Ramos I;Guerrero-Ruiz A .[J].Journal of Catalysis,2000,192(02):344. |
| [15] | Davis B H;Keogh R A;Alerasool S;Zalewski D J Day D E Doolin P K .[J].Journal of Catalysis,1999,183(01):45. |
| [16] | Stichert W.;Kuba S.;Knozinger H.;Schuth F. .Monoclinic and tetragonal high surface area sulfated zirconias in butane isomerization: CO adsorption and catalytic results[J].Journal of Catalysis,2001(2):277-285. |
| [17] | Jacob K-H;Knzinger E;Benier S .[J].Journal of Materials Chemistry,1993,3(06):651. |
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