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Automobile exhaust purification knowledge

      Vehicle exhaust emissions is an important factor in causing air pollution. 43% of all the pollutants in the atmosphere from vehicle exhaust. Automobile exhaust contains carbon monoxide, nitrogen oxides, hydrocarbons, and the adverse influence of solid particles on the human body.

      Carbon monoxide is the largest concentration of substances in the vehicle exhaust emissions account for 75% of the carbon monoxide in the atmosphere, inhalation of CO and hemoglobin, resulting in decreased oxygen carrying capacity of blood contained, so that the body of oxygen, causing the nerve center of the damage caused by the functional obstacles, even death.
      Nitrogen oxide is a general term for a variety of nitrogen compounds, the majority of nitric oxide in vehicle exhaust, and a small amount of nitrogen dioxide. The toxicity of nitrogen oxides 10 times higher than carbon monoxide. Nitrogen oxides into the alveoli through the respiratory tract to the formation of nitrite and nitrate, respectively, resulting in a strong stimulus to cause chest tightness, cough, asthma, pneumonia, and even pulmonary edema. High concentrations of nitric oxide can cause paralysis and spasm of the nerve center of the body; nitrogen dioxide is a foul-smelling toxic gas, the concentration of one ten thousandth person in which they live half an hour will get pulmonary edema and death.
      Hydrocarbons is a general term for various types of organic matter. Automobile exhaust contains a variety of hydrocarbons of about 200. Some composition of the hydrocarbons are carcinogenic. Hydrocarbons and nitrogen oxides in automobile exhaust in strong sunlight under a series of chemical reactions, the formation of photochemical smog.
      In order to improve urban air quality, the countries and regions in the world has enacted restrictions on vehicle exhaust emissions limit value, the EU, the European standard is the reference standard implementation of a majority of countries and regions. Since the EU in 1992, the European Ⅰ standard has been modified six times, Europe Ⅴ standards was September 1, 2009 implementation of the, Ⅵ EU standards will be held in September 2014.
      April 27, 2005, the State Environmental Protection Administration announced the auto emissions standards equivalent to the standard of Euro Ⅲ and Euro Ⅳ. Stage Ⅱ Ⅲ, standard exhaust emissions limits than our previous implementation of the standard exhaust emission limits reduced by 30%, and was implemented in the country from July 1, 2007. Beijing took the lead in the domestic first implementation of the country IV vehicle emissions standards.
      To achieve the above emission standards, the car engine emissions, exhaust gas purification, that is installed on the exhaust pipe of the vehicle exhaust purifier (or catalytic converters) to purify the car exhaust. Purifier core material for the catalyst, the exhaust of carbon monoxide, nitrogen oxides, hydrocarbons and other harmful ingredients in the role of a catalyst converted into harmless gas carbon dioxide, water, nitrogen discharged outside the vehicle to achieve the purpose of purification of exhaust gas. The Ganzhou Bo Crystal Technology Co., Ltd. production of exhaust gas purification catalyst has reached Europe Ⅴ standard and is ideal automobile exhaust purification catalyst products.

关键词:"Cerium Zirconlum Catalysts""Cerium Zirconlum Mixed Oxide"


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