Carbonate‐Promoted Catalytic Activity of Potassium Cations for Soot Combustion by Gaseous Oxygen

The possible mechanism of soot combustion catalyzed by potassium carbonate loaded on aluminosilicate was elucidated to understand the surface reaction in solid–solid–gas triphasic catalysis. Potassium species on aluminosilicate showed high catalytic performance for the oxidation of carbon black by gaseous oxygen. Aluminosilicate helped in stabilizing the alkali cation on the surface. The carbonate ion played a critical role in enhancing the catalytic performance by acting as a supplier of active electrons to gaseous oxygen. To the best of our knowledge, this is the first report on the essential role of carbonate on the catalytic activity of an alkali cation for an oxidation reaction, although carbonate (carbon dioxide) is widely recognized to hinder the catalytic performance of the alkali compound for base‐catalyzed reactions.

[1]  A. Kotarba,et al.  Soot oxidation over K-doped manganese and iron spinels — How potassium precursor nature and doping level change the catalyst activity , 2014 .

[2]  Changsheng Su,et al.  Application of glass soot catalysts on metal supports to achieve low soot oxidation temperature , 2014 .

[3]  Changsheng Su,et al.  The effect of Ca2+ and Al3+ additions on the stability of potassium disilicate glass as a soot oxidation catalyst , 2013 .

[4]  A. Kotarba,et al.  Role of Electronic Factor in Soot Oxidation Process Over Tunnelled and Layered Potassium Iron Oxide Catalysts , 2013, Topics in Catalysis.

[5]  M. Ogura,et al.  Nepheline Synthesized from Sodalite as Diesel-Soot Combustion Catalyst : Structure–Property Relationship Study for an Enhanced Water Tolerance , 2012 .

[6]  H. Ushiyama,et al.  Alkali Carbonate Stabilized on Aluminosilicate via Solid Ion Exchange as a Catalyst for Diesel Soot Combustion , 2011 .

[7]  Martyn V. Twigg,et al.  Catalytic control of emissions from cars , 2011 .

[8]  K. Shimizu,et al.  Study of active sites and mechanism for soot oxidation by silver-loaded ceria catalyst , 2010 .

[9]  Wenjie Shen,et al.  Low-temperature oxidation of CO catalysed by Co3O4 nanorods , 2009, Nature.

[10]  A. Kotarba,et al.  Strong electronic promotion of Co3O4 towards N2O decomposition by surface alkali dopants , 2009 .

[11]  M. Ogura,et al.  Nepheline from K2CO3/nanosized sodalite as a prospective candidate for diesel soot combustion. , 2008, Journal of the American Chemical Society.

[12]  Debora Fino,et al.  Open issues in oxidative catalysis for diesel particulate abatement , 2008 .

[13]  H. Ando,et al.  Potassium-doped sodalite: A tectoaluminosilicate for the catalytic material towards continuous combustion of carbonaceous matters , 2008 .

[14]  C. Goersmann.  Catalytic Coatings for Active and Passive Diesel Particulate Filter Regeneration , 2005 .

[15]  A. P. Walker.  Controlling Particulate Emissions from Diesel Vehicles , 2004 .

[16]  R. T. Yang,et al.  Electronic structure methods applied to gas–carbon reactions , 2003 .

[17]  R. Farrauto,et al.  Automobile exhaust catalysts , 2001 .

[18]  Dirk Lamoen,et al.  Adsorption of potassium and oxygen on graphite: A theoretical study , 1998 .

[19]  J. Moulijn,et al.  Catalysts for the oxidation of soot from diesel exhaust gases. I. An exploratory study , 1996 .

[20]  H. Hattori.  Heterogeneous Basic Catalysis , 1995 .

[21]  R. Hoffmann,et al.  The potassium promoter function in the oxidation of graphite: an experimental and theoretical study , 1993 .

[22]  T. Ozawa.  Estimation of activation energy by isoconversion methods , 1992 .

[23]  J. W. Ward,et al.  The Infrared Spectra of Carbon Dioxide Adsorbed on Zeolite X , 1966 .