As an advanced automobile exhaust treatment technology, cold catalyst filter plays an important role in reducing harmful gas emissions. Its working principle and design features enable it to effectively reduce harmful gas emissions in automobile exhaust, which is specifically reflected in the following aspects:

First, the cold catalyst filter degrades nitrogen oxides (NOx) through catalysis, converting them into environmentally friendly nitrogen (N2) and water vapor (H2O). NOx is one of the main harmful gases in automobile exhaust. It reacts with oxygen in the air to form pollutants such as ozone and fine particulate matter, which has adverse effects on air quality and human health. The catalyst in the cold catalyst filter can promote the reduction reaction of NOx at a relatively low temperature, effectively reducing the emissions of such harmful gases.

Secondly, the cold catalyst filter converts CO into carbon dioxide (CO2) by catalyzing the oxidation reaction of carbon monoxide (CO). Carbon monoxide is a colorless, odorless but extremely harmful gas that affects oxygen transport in the blood, leading to poisoning and other health problems. The catalyst in the cold catalyst filter can accelerate the oxidation process of CO and convert it into relatively harmless CO2, effectively reducing CO emission levels.

Third, cold catalyst filters can promote the catalyst oxidation of volatile organic compounds (VOCs). VOCs are a class of organic pollutants that are potentially harmful to air quality and human health, and often originate from vehicle exhaust and industrial waste gas. The catalyst in the cold catalyst filter reduces the emissions of such harmful gases by catalyzing the oxidation reaction of VOCs at relatively low temperatures, converting them into harmless water vapor and carbon dioxide.

In addition, the cold catalyst filter also captures particulate matter, including fine particulate matter (PM2.5), etc. through physical filtration. Particulate matter is harmful to both air quality and the human respiratory system, and the filter inside the cold catalyst filter can effectively intercept these particles and reduce the possibility of their release into the atmosphere, thereby reducing particulate matter emissions.

Cold catalyst filters can effectively reduce harmful gas emissions in automobile exhaust at lower temperatures through the dual mechanisms of catalyst reaction and physical filtration. This advanced exhaust gas treatment technology makes a positive contribution to improving air quality, protecting the environment and human health.