Isomorphous substitution of Mn(II), Ni(II) and Zn(II) in AlPO-31 molecular sieves and study of their catalytic Performance

摘要

Isomorphously substituted molecular sieves, MAPO-31, NAPO31 and ZAPO-31, were prepared under mild hydrothermal conditions from gels containing Sources of aluminium, phosphorus, appropriate metal and dipropylamine (DPA), Presumably acting as a structure-directing template. They were characterized by XRD, FTIR, TGA, inductively coupled plasma (ICP), ESR, Brunauer, Emmett, Teller (BET) And diffusion reflectance spectroscopy (DRS) techniques. In the XRD, the peak at 2θ=16.7 of the metal substituted AlPO-31 is more intense than that of pure AlPO- 31 suggesting preferential occupation of the plane corresponding to it as compared to other planes.