Gasoline Engine Oil Specifications, Past, Present and Global

Preparation of zeolite type faujasite from glass waste and aluminum scraps for the selective catalytic reduction of NO with NH3

“…Around 2005, NH 3 -SCR technology using V-catalysts was introduced for heavy duty (HD) diesel vehicles in Europe [13] Nevertheless, some disadvantages like the rapid decrease in activity and selectivity at temperatures above 550 °C [14][15][16] as well as the toxicity of vanadium species, which volatilize at temperatures above 650°C [ 17,18], prompted the development of new types of catalysts. Among them, zeolites exchanged with copper and iron [14][15][16] are active over a wider temperature range than catalysts based on vanadium oxide and are less selective for N 2 O.…”