合成了AlPO-11, SAPO-11及其含杂原子Co或Mn的磷铝系列分子筛. XRD结果证实,合成产物 均具有AEL分子筛晶体结构. 用X射线荧光光谱测定了晶体的元素组成,并用NH3-TPD考察 了样品的酸性和酸分布. 在以合成的分子筛为基质所制备的催化剂上进行了丁烷异构化和一 步异构脱氢反应. 结果表明,载0.3%Pd的SAPO-11分子筛催化剂具有最高的丁烷异构化选择 性,而在丁烷一步异构脱氢反应中,含金属杂原子的催化剂具有更高的异丁烯选择性.
AlPO-11, SAPO-11 and Co(Mn)AlPO-11, Co(Mn)APSO-11 molecular sieves were synt hesized. XRD patterns indicated that the moleclar sieves have AEL crystal struct ure. The elementary analysis was finished with X-ray fluorescene spectrum. The acid property of the samples was tested by NH3-TPD. The catalytic performance of the synthesized molecular sieves, modified by Pd or Pt, for isomerization an d dehydroisomerization of n-butane was investigated. Pd/SAPO-11 catalyst s howed the highest selectivity in isomerization of n-butane. It was also fou nd that Pt/MeAPO-11 and Pt/MeAPSO-11 appeared higher selectivity in dehydroiso merization than the catalysts on base of AlPO-11 and SAPO-11 molecular sieves respectively.
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