PREPARATION AND CHARACTERIZATION OF NANOSTRUCTURED AND MESOPOROUS MIXED METAL OXIDES FOR PROPANE AMMOXIDATION TO ACRYLONITRILE

 
 
 
 

PREPARATION AND CHARACTERIZATION OF NANOSTRUCTURED AND MESOPOROUS MIXED METAL OXIDES FOR PROPANE AMMOXIDATION TO ACRYLONITRILE

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Title: PREPARATION AND CHARACTERIZATION OF NANOSTRUCTURED AND MESOPOROUS MIXED METAL OXIDES FOR PROPANE AMMOXIDATION TO ACRYLONITRILE
Author: SONG, LINGYAN
Description: Recently discovered multi-component Mo-V-Te-Nb-O catalysts are very promising catalysts for propane ammoxidation to acrylonitrile. This mixed metal oxide system contains so-called “M1”, “M2” and rutile phases with orthorhombic, hexagonal and monoclinic structures, respectively, which were proposed to be active and selective in propane ammoxidation to acrylonitrile. In this study, the bulk mixed metal Mo-V-Te-Nb-O oxide catalysts with pure M1 and rutile structures were prepared separately in hydrothermal synthesis, followed by their calcination under nitrogen atmospheres. Novel approaches for the synthesis of mesoporous niobium oxide and niobium-based 4-component mesoporous Mo-V-Te-Nb-O phases were developed in the present work.. The novel thermally stable mesoporous Mo-V-Te-Nb-O phases were synthesized by evaporation-induced self-assembly EISA employing the mesoporous niobium oxide possessing a high Tammann temperature as a major framework component, followed by HT or dry gel conversion (DGC) treatment. In this work, the synthesis of bulk mesoporous and nanocrystalline orthorhombic (M1) catalysts inside the pore channels of ordered mesoporous hosts of SBA-15 silica was explored. The catalytic activity for propane ammoxidation to acrylonitrile was investigated for these three types of Mo-V-Te-Nb-O catalysts: dense, mesoporous bulk and SBA-15 supported mixed metal oxide catalysts.
Permanent Link: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1155664256
http://hdl.handle.net/2374.OX/10475
Date: 2006

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