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As cities expand and industrial development reaches into every corner of our world, air pollution threatens both our health and our enjoyment of the natural environment.

The main pollutants of vehicles emission are Carbon Monoxide(CO), Hydrocarbon(HC), Nitrogen Oxide(NOx), Carbon Dioxide(CO2 )etc. Carbon Monoxide rapidly reduces the percentage of oxygen for the blood. Beside, that will make your feeling, reaction, apprehension, and memory much poor than before. In serious, it will make a great damage for your circulatory system and take a high risk for your life. The NOx main component is NOĦBNO2 , this is also have a critical damage for human, especially for the respiratory system. Fatally, all scientists also unclearly explain and understand the HC this component have any damage for the human body. But, when the HC and NOx meet the ultraviolet light in the sunshine while produce a complicate chemical reaction. At the same time, that will make a new contaminant affect the human body. Otherwise, when the human breath a CO2 for long times ago, it will easy have a nervous problem occurs.

The above equation illustrates what is meant to happen during combustion : oxygen is consumed and Fuel is oxidized thermally. Ideally, combustion ought to be clean process - one where all fuel is consumed, leaving behind only carbon dioxide and water and producing energy. But in the real world, complete combustion is seldom achieved. The need to eliminate these noxious by-products of the combustion process led to the invention of the Catalytic Converter.

A Catalytic Converter consists of three major elements:

1) Metal housing, which holds the converter and the exhaust systems together.
2) Substrate, usually made of ceramic or metal material, coated with a thin layer of washcoat chemicals.
3) Washcoat Chemicals, that are the active components for "CATALYSIS", defined as the acceleration of a chemical reaction to reduce unwanted pollutants.

Attached to the engine of a vehicle or machine powered by interal combustion, a Catalytic Converter forces the emission gases to make contact with its substrate. The gases react with the substrate's washcoat chemicals, causing unconsumed hydrocarbons (HC), carbon monoxide (CO), nitrogen oxide (NOx) and particulate matter (PM) to be burned up. The result is cleaner emissions.

In traditional Catalytic Converter, the substrate is a "HONEYCOMB" made of ceramic, coated with activated alumina-based wash-coat (Figure 1). Gasline is suitable use the honeycomb than disesl. Many particulate matter product when use the honeycomb in disesl. While effective, the design of the honeycomb nevertheless allows many particles to flow through without coming into contact with the substrate.

To achieve a higher rate of catalysis, Catalyst employs a substrate made of a special metallic alloy. The emission gases follow a convoluted path through this material, turbulence is created, forcing the gases into much closer contact with the substrate than the standard honeycomb design can achieve (Figure 2).

At Catalyst (Hong Kong) Environmental Technology Limited - Catalyst- we supply emission control solutions that are efficient and cost-effective for automakers, engine designers, fleet operators and factory owners. Our Catalytic Converters greatly reduce noxious emissions from internal combution engines. They are light, easy to install and available in sizes for all applications, whether for customized use or retrofitting. And thanks to Catalyst Research & Development, product performance exceeds industry norms.

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At Catalyst, our engineers, designers and technicians put their experience and know how to work for you-evaluating your organizations current applications and future needs, helping you to maximize the potential of our products and services.


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