Synthesis and Characterisation of Nanoporous VCuAPO-5 for Propene Oxidation
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- Institutt for kjemi 
In this work a synthesis route for the incorporation of vanadium and copper into the framework of AlPO-5 by isomorphous substitution been investigated. The resulting product, VCuAPO-5 have was characterised by x-ray diffraction to determine the phase of the product. After a synthesis procedure that gave the pure AFI phase was discovered the material was characterised by ICP-MS, XAS, UV-Vis spectroscopy and catalytic measurements were done to test VCuAPO-5 as a catalyst for the oxidation of propene to acrolein. VCuAPO-5 have been synthesised using the hydrothermal synthesis method. The theoretical composition used in the synthesis was Al : P : 0.02 V : 0.02 Cu : 0.6 TPAOH : 18 H2O. VCuAPO-5 have been characterised with the primary purpose of proving isomorphous substitution. XRD and XAS showed that copper was successfully incorporated into the AlPO-5 framework as tetrahedrally coordinated Cu(II), and upon reduction to Cu(I) as coordinated as copper dimers. The reduction of Cu(II) to Cu(I) was largely irreversible.No conclusive evidence for the isomorphous substitution of vanadium was found. VCuAPO-5 was shown to be an active catalyst for the production of acrolein from propene, showing peak selectivity of 2.8% at 450 oC.