中文摘要：

采用静态水热法，在活性胶液中各组分摩尔比为n（R）／n（ZnO）／n（Al2O3）／n（P2O5）／n（H2O）=1：32：Y：1．1：80（0．5x＋y=-1）的条件下合成了具有不同锌含量的锌铝磷酸盐分子筛（ZnAPO-11），利用XRD，SEM，N2吸附，MAS—NMR及ICP-AES等方法对合成的ZnAPO-11分子筛进行了表征。结果表明，当0≤n（ZnO）／n（Al2O3）≤0．04时，可以合成出具有AEL结构类型的ZnAPO-11分子筛，样品具有较高的结晶度和纯度；晶体形貌均匀，呈长条形；锌同晶取代了AIPO4-11分子筛上的骨架铝。以正己烷为模型底物，评价了合成的znAPO-11分子筛的催化裂解反应活性，研究结果显示ZnAPO-11在475～550℃具有反应活性，其中正己烷的转化率随接触时间的增加而增加，反应的表观速率常数随反应温度的升高而增加；正己烷在ZnAPO-11分子筛上的催化裂解反应的速率方程中的正己烷浓度项反应级数为1，表现速率常数与反应温度间的关系可用Arrhenius公式表示。

英文摘要：

Zinc- substituted aluminophosphate molecular sieves （ZnAPO- 11） containing different zinc contents were synthesized using the gel composition n（R）/n（ZnO）/n（Al2O3）/n（P2O5）/n（H2O）=1： x ： y ： 1.1 ： 80 （0.5x＋y=l） by static hydrothermal method. As- synthesized ZnAPO- 11 molecular sieves were characterized by XRD, SEM, N2- adsorption, MAS NMR and ICP--AES techniques. The results show that ZnAPO--11 molecular sieves with AEL topology are prepared in the range of 0≤n（ZnO）/n（Al2O3 ）≤0.04. And resultant ZnAPO-11 molecular sieves are of high crystallinity and purity. A regular platelet morphology is observed for the as--synthesized ZnAPO--11 molecular sieves. Experimental data show that Zn as heteroatom is successfully incorporated into the framework of AlPO4 -- 11 and substituted for Al. The n- hexane cracking over ZnAPO--11 was examined under different reaction conditions. It is found that ZnAPO--11 molecular sieves exhibited a significant activity for the n--hexane cracking at 475-550 ℃. Conversion level of n--hexane increased with increasing contact time, and the apparent rates increased with increasing reaction temperature. The first order was determined of the n--hexane concentration. In addition, the dependence of the rates on reaction temperature can be expressed in terms of Arrhenius formula in the whole cracking temperature range.