A Hydrophobic Pt/Fluorinated Carbon Catalyst for Reaction of NO with NH₃

Abstract

A novel hydrophobic fluorinated carbon (FC) supported Pt catalyst has been developed that shows high activity for reaction of NO x with NH3 in the temperature range 170−275 °C. No water inhibition effect on the catalytic activity was observed with a vapor content of 4% (v/v) in the feed. A slight increase in N2O formation at 275 °C and an increase in N2 formation at 175 °C were observed when water vapor was present in the feed. No deactivation of the Pt/FC catalyst occurred during 80 h on stream under either wet feed or dry feed conditions. Substantially complete NO and NH3 conversion can be achieved at temperatures above 170 °C and gas hourly space velocities below 14 400 h-1, and N2 and N2O are the main products.

Design of Pd-based pseudo-binary alloy catalysts for highly active and selective NO reduction

“…Specifically, NO removal has long been studied as an indispensable process for exhaust gas purification 5. Platinum group metals (PGMs) such as Pt, Rh, and Pd are known as efficient catalysts for NO reduction with CO,6,7 H 2 ,8 NH 3 ,9 and hydrocarbons10 as reductants. Attention has been increasingly focused on the use of Pd because of its prominent oxidation activity for hydrocarbons and CO,11 and its excellent thermal stability 12.…”

Influence of preparation methods on the physicochemical properties and catalytic performance of MnO -CeO2 catalysts for NH3-SCR at low temperature

“…In recent years, considerable efforts have been devoted to developing novel NH3-SCR catalysts that show good low-temperature catalytic performance. Some examples include supported noble-metal catalysts [11], metal-ion exchanged molecular sieves [12][13][14], and manganese-based catalysts [5,8,9,[15][16][17][18]. Among these, manganese-based catalysts have attracted considerable attention owing to their good redox properties and excellent oxygen migration ability, which are beneficial for oxidation of NO to NO2, and lead to relatively high conversion of NOx at low temperatures through a "fast NH3-SCR" route [3,19].…”