Bifunctional active sites for adsorption of NOx

US8703083B2 · kind B2 · utility

Assignees

• The Regents of the University of California · US
• TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC. · US

Inventors

• Andrew Solovyov · Berkeley, US
• Alexander Katz · Richmond, US
• Enrique Iglesia · Clinton, US
• Paul T. Fanson · Howell, US

Key dates

• Filing date: Jul 28, 2009
• Grant date: Apr 22, 2014
• Expiry date: Oct 27, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2253/202
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Immobilized nitronyl nitroxide active sites on the surface of a porous inorganic oxide support act as efficient and rapid oxidants for NO, reacting with >99% of the NO under flow conditions through a packed bed; and, in a parallel configuration with nitroxyl radical active sites, act to remove >99 % of both NO and NO2 from a gas mixture, with >95% of the active sites participating in NOx trapping.