ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
The replacement of toxic hydrazine used for catalytic propulsion by less toxicpropellants such as ionic liquids is of hot interest. The challenge for this replacement is theformulation, development and shape forming of new catalysts. Efficient catalysts for thedecomposition of aqueous 79 wt.-% HAN solutions (hydroxylammonium nitrate NH3OH+NO3-)contain 10 wt.-% Pt active phase deposited on a support. Laboratory-made powder catalystscontain platinum supported on Si-doped alumina and display a good activity at low temperature.But, for industrial applications in propulsion thrusters, the pressure drop due to a powder is toohigh and consequently shape formed supports and catalysts must be prepared and investigated.Two catalyst types have been prepared (i) from shaped supports obtained at the laboratory levelusing the “oil-drop” method and (ii) from supports formed through an industrial procedure. Bothshape formed samples display comparable properties as the powder support, such as high thermalstability linked to the presence q and d aluminas and similar BET surface area. Catalysts basedon these supports show efficient catalytic activities
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.427.pdf
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