%0 Journal Article
%T Outstanding HC-SCR of Lean NOx Over Pt/Mesoporous-Silica Catalysts
%A Tamikuni Komatsu
%A Keizou Tomokuni
%A Mitsuo KonishiTakashi Shirai
%J The Open Catalysis Journal
%D 2008
%I Bentham Open
%R 10.2174/1876214X01003010024]
%X Perfect de-NOx over a wide temperature range above 170 ˇăC was achieved using a new Pt-catalyst supported on mesoporous silica (Pt/MPS) and a stoichiometric amounts of long-chain hydrocarbons as reducing agents for NOxpurification. Kinetic investigation of the HC-SCR of lean NOx over Pt/MPS, Pt/alumina and Pt/zirconia showed that such a remarkable activity of Pt/MPS is due to a large frequency factor but not to activation energy. Acid-treatment of the supports increased the activities of the catalysts and generated new IR-peaks in the range 1000-1200 cm-1, which suggests the support-effects on the catalyst-activities to be related to the special surface functional groups of the supports. The present HC-SCR must be very useful to remove diesel-NOx by means of pulse-injection of diesel fuel into the exhaust.
%U http://www.benthamscience.com/open/tocatj/articles/V003/24TOCATJ.htm