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Nanoporous Sio2/Vycor Membranes For Air Separation, Mihir Tungare
Nanoporous Sio2/Vycor Membranes For Air Separation, Mihir Tungare
Theses
Porous Vycor tubes with 40Å initial pore diameter were modified using low pressure chemical vapor deposition (LPCVD) of silicon dioxide N02). Diethylsilane (DES) in conjunction with nitrous oxide (N2O) was used as a precursor to synthesize these SiO2 films. The aim of this study was to obtain a considerable selectivity between species of comparable size and hence N2O was used. The use of N2O was believed to make the process self-limiting. DES was allowed to flow through the tube and N2O on the outside in the chamber at 550°C …