This newalkali metal-based catalyst developed by Panasonic Ecology Systems Co., Ltd., a subsidiary of Panasonic Corporation, accelerates the oxidation of particulate matter and directly decomposes them without using platinum. It provides the same level of combustion performance as a conventional platinum-based catalyst but at a lower temperature (approximately 20% lower, in-house experiment). This means less energy is required to maintain the optimum temperature for catalytic reactions, thereby reducingCO2 emissions and contributing to energy conservation. When used at the same temperature required for the conventional platinum-based catalyst, this new catalyst even increases the combustion speed.
In comparison, the current mainstream diesel exhaust treatment equipment uses platinum as the purification catalyst, making its costs more expensive and susceptible to price fluctuations. In addition, conventional equipment consumes fuel in order to maintain the temperature for catalytic reactionat an optimum level during particulate treatment, reducing the overall effect of the equipment.
Standard diesel exhaust gas treatment equipment consists of a diesel oxidation converter (DOC), which removes hydrocarbons (HC) and carbon monoxide(CO), and a catalyst-coated diesel particulate filter (DPF), which removes particulate matter. With a conventional catalyst, the DOC itself also requires platinum to produce nitrogen dioxide (NO2), as the conventional catalyst cannot decompose particulate matter without the oxidation action of NO2. However, since the newly developed catalyst can directly decompose particulate matter without using NO2, the amount of platinum used in the DOC can also be significantly reduced, thereby reducingthe total cost of the equipment.
In addition to using a new metal compound in the catalyst, Panasonic has devised a new catalyst coating technology to maximize the performance of the catalyst on a variety of DPF types (cordierite, SiC, metal, etc.). A new additive was also developed to solve the durability issue associated with a catalyst using alkali metal, making this new technology possible. Panasonic currently has 84 patents in Japan and 7 patents overseas, including pending applications.
Particulate matter in diesel engine exhaust gas
Fine substances based on carbon (C) contained in the exhaust gas from diesel engines. They are a major component of the black exhaust gas produced by diesel engines and pollutethe air. Therefore, removal of particulate matter is required by regulations.
DOC (Diesel Oxidation Converter)
One of the components of diesel exhaust gas treatment equipment. Its function is to decompose the hydrocarbons (HC) and carbon monoxide (CO) contained in diesel engine exhaust gas. When used in combination with a conventional platinum-based catalyst-coated DPF, platinum needs to be added to the DOC to produce NO2.
Catalyst-coated DPF (Diesel Particulate Filter)
One of thecomponents of diesel exhaust gas treatment equipment. Its function is to remove the particulate matter contained in diesel engine exhaust gas. DPF is made by coating a base material with a catalyst.
One type of ceramic material used in catalyst to process engine exhaust gas. Its relative density is light and it excels in heat capacity.
One type of ceramic material used in catalyst to process engine exhaust gas. It excels in heat resistance.
Panasonic Corporation is a worldwide leader in the development and manufacture of electronic products for a wide range of consumer, business, and industrial needs. Based in Osaka, Japan, the company recorded consolidated net sales of 7.42 trillion yen for the year ended March 31, 2010. The company's shares are listed on the Tokyo, Osaka, Nagoya (TSE: 6752) and New York (NYSE: PC) stock exchanges. For more information on the company and the Panasonic brand, visit the company's website at http://panasonic.net.
Panasonic Corporation Overseas Public Relations Office Tel: +81-3-6403-3040 Fax: +81-3-3436-6766 Panasonic News Bureau Tel: +81-3-3542-6205 Fax: +81-3-3542-9018
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