Technology

Problem

• NOx is one of the principal components of smog. Ground level ozone is also a secondary pollutant byproduct of nitrogen oxides (NOx) and hydrocarbons. The combustion of diesel from on-road, off-road and stationary sources contributes to the formation of both NOx and HC emissions.
• In addition to the primary health effects listed above, PM (also known as black carbon or soot) is a secondary greenhouse gas (GHG) responsible for accelerating climate change.  Per unit of weight, PM has a much higher effect than CO₂ in contributing to global warming effects, especially impacting the polar ice caps.  PM absorbs sunlight and its infrared radiation, causing a warming effect in the atmosphere. Unlike carbon dioxide, which remains in the atmosphere for more than a century, black carbon particles generally remain airborne for weeks and have more localized heating effects. As such, reducing soot provides a quick and effective way to make an immediate impact on climate change.
• While both nitric oxide (NO) and nitrogen dioxide (NO₂) are considered toxic gases by the EPA and contribute to smog, NO₂ is of particular concern as it is corrosive and a highly reactive oxidant. In addition to regulating NOx levels for air quality, some regions and applications are very NO₂-sensitive. For example, the Scottish Low Emissions Register requires verified products to be NO₂-neutral, as well as meet the overall NOx targets. Likewise, applications such as underground mining are very sensitive to NO₂ emissions.

Solution

Clean Diesel has a number of solutions to directly combat NOx:

• Exhaust gas after-treatment technologies, such as airless return flow SCR and EGR-SCR, to achieve the highest level of NOx reduction while improving fuel efficiency.
• While conventional particulate filter solutions can increase NOx and in many cases create high levels of NO₂, CDT’s Purifier filter systems provide a high degree of particulate reduction while reducing NOx – and most importantly without NO₂ increase.
• Advanced biofuel formulations and additives to remove the NOx increase normally associated with biodiesel use. This facilitates the availability of low emissions renewable fuels.

Problem

• According to the EPA, particulate matter (PM) formed by the combustion of fuels contributes to asthma and allergies and can cause other serious health problems including lung cancer, heart disease, neurological disease and premature death. The California Air Resources Board (CARB) has listed PM as toxic to humans. Those most at risk from PM are the elderly, people with heart and/or lung disease, children and infants.
• In addition to the primary health effects listed above, PM (also known as black carbon or soot) is a secondary greenhouse gas (GHG) responsible for climate change second only to CO₂. PM absorbs sunlight and converts it to infrared radiation, causing a warming effect in the atmosphere. Unlike carbon dioxide, which remains in the atmosphere for more than a century, black carbon particles only remain airborne for weeks. As such, reducing soot provides a quick and effective way to make an immediate impact on climate change.

Solution

Clean Diesel has a number of solutions to directly combat PM:

• Complete range of Purifier particulate filter systems providing PM reduction of up to 99%
• Durable, low-cost wire mesh partial filters with reductions of up to 60% for regions with variable fuel quality
• By increasing the rate of chemical reaction, Platinum Plus Fuel-Borne Catalysts allow combustion to begin at lower temperatures and proceed more uniformly and completely within the combustion chamber. This results in a reduction in engine-out soot as well as reducing the soot build-up and associated backpressure when used with wall flow diesel particulate filters.