Monolithic Catalyst Vs Ceramic Honeycomb

Other channel cross sections are possible including triangular hexagonal trapezoidal and round.

Monolithic catalyst vs ceramic honeycomb.

The flow pattern in the monolithic catalyst reactor was segmented gas liquid flow slug flow. Monoliths are sometimes called flow through substrates. Ceramic substrates have been the choice for catalyst coating companies for decades. In the case of honeycombs cordierite is the.

Monolithic ceramics and heterogeneous catalysts. Ceramic substrates honeycombs usually have square cells while most metallic substrates have sinusoidal channels. A catalyst support provided with an activated alumina layer which is formed on the surface of the ceramic honeycomb structure is disclosed. In this paper the current status of the monolith technology for applications in the chemical industry is reviewed.

In the processes of the chemical industry however their current use is very limited. Many coating companies will suggest ceramic to avoid production. The hydrogen pressure and the temperature were varied between 30 40 bar and 509 523 k respectively. Applied catalysts manufactures a wide variety of abate voc ceramic monolith supported catalysts.

Honeycombs and foams william m carty and peter w lednor recent advances have been made in research on ceramic monolithic catalyst supports particularly on honeycombs and ceramic foams. The catalyst support of the present invention is formed of ceramic such as cordierite of which coefficient of thermal expansion is lower than alumina and is provided with microcracks which occur when the honeycomb structure is formed. The pelleted design is obsolete and increasingly difficult to find on the market. Application areas in which monolithic catalysts have superior performance.

Each monolith contains thousands of parallel channels or holes which are defined by many thin walls in a honeycomb structure the channels can be square hexagonal round or other shapes. Metallic vs ceramic catalyst substrates. Honeycomb shaped monolithic catalysts are the standard catalyst shape in most environmental applications. Engineers prefer metallic coating companies prefer ceramic.

Monolithic catalyst substrates figure 1 are made of ceramics or metal. In the off road emission control applications monolithic metallic or ceramic catalyst supports became the standard. Monoliths for automotive catalytic converters are made of a ceramic that contains a large proportion of synthetic cordierite 2mgo 2al 2 o 3 5sio 2 which has a low coefficient of thermal expansion.