КАТАЛИТИЧЕСКАЯ ТЕХНОЛОГИЯ ОЧИСТКИ ОЛЕФИНОВ ОТ АЦЕТИЛЕНОВ, NOx И КИСЛОРОДА

Efficient extraction of valuable hydrocarbons from waste gas flows FCC largely depends on the concept, used under selective hydrogenation. The company «Clariant» offers for this purpose two types of catalysts. Sulfided nickel catalyst used on an industrial scale, it is recommended under normal CO levels. For streams containing high concentrations (a few percent) of CO, with small amounts of sulfur or lack developed catalyst precious metal. The off-gases («off»-gases) from catalytic cracking (Fluid Catalytic Cracking – FCC) and deep catalytic cracking units are typically used as fuel, despite the fact that some compounds they contain, such as hydrogen, ethylene, and propylene, have greater value. Until relatively recently, the cost of removal from flue gas using conventional treatment technologies from admixtures of acetylene, methylacetylene and diolefins exceeded commercialized because of the problem of poisoning catalyst impurities present sulfur and heavy metals. This paper discusses the latest developments in technology selective hydrogenation on both new and existing catalysts, which in recent years have allowed to solve these problems and greatly improve the extraction of valuable components.