NOx abatement part II- Why use NOXGUARD?

 

NOx Abatement

Continuing from our last blog post, which you can read here , we talked about what NOx is, why we need to control it and how each of us can help control it. As we all now know, industrial plants, and more specifically electrical power plants, generate a great deal of NOx , which contaminates our environment. There are several ways for these industrial plants to control their emissions, two of the ways are through the use of Selective Catalytic and Non Catalytic Reduction systems with a Urea Liquor mix (Diesel Exhaust Fluid at different concentrations). Different fuels need different NOx abatement techniques, for those that use Urea, we are here to shed some light.

 

What we know about SCR

 

  1. It is one of the most effective NOx abatement systems
  2. Has a higher initial cost
  3. Can achieve up to 94% DRE

 

What we know about SNCR

  1. Based on ionizing the Ammonia or Urea instead of using a catalyst
  2. Either urea or ammonia must be injected within a boiler or ducts where temperature is between 900 and 1100 degrees Celsius.
  3. Temperature has to be right, or ammonia will “slip through” or more NOx will be created than is reduced
  4. Can achieve up to 70% DRE

 

What is the difference between agricultural grade urea and NOXGUARD Industrial grade urea ( urea used for NOx control)?

Urea used for fertilizer is handled and stored differently than urea made into NOx control solution. High Quality dry or solution urea used in NOx control is kept in dedicated clean storage to ensure purity for both SCR and SNCR systems.

 

Why would a straight injection SNCR system need highly pure water or urea?

We know that the SCR system needs high purity water and urea, given the sensitivity of the catalyst bed. For the SNCR system if there happens to be any impurities in the solution they could be caked onto the nozzles and equipment in the exhaust zone. This can lead to clogging and could ultimately lead to costly damages in SNCR systems.

 

Why choose NOXGUARD for NOx Abatement?

NOXGUARD has spent many years on the technical process of making urea solution for NOx control in the automotive industry. Impure water and Ag-grade urea will not suffice in making urea NOx control solution. The water source must be removed of all impurities and de-ionized; if this is not done pollutants can damage the NOx control system. Fertilizer/feed grade urea can have contaminants, which will damage SNCR or SCR systems.

References:

1.Nitrogen Oxides (NOx) Why and How they are Controlled

http://www.epa.gov/ttncatc1/dir1/fnoxdoc.pdf

NOx Abatement part I- Did you know?

What are Nitrogen Oxides?

Nitrogen Oxides , the pesky family of NOx compounds, can come from natural sources or from human activity. They come mostly from automobiles and other mobile origins, but cars are not the only ones to blame,  electric plant boilers are also big players in the production of NOx compounds, as well as other stationary industrial sources. (1)

  • Mobile sources produce 50% of all NOx
  • Electric power plants produce 20% of all NOx
  • 30% comes from all other natural and human produced sources    

 

NOX-Abatement

Why should we control Nitrogen Oxides?

The NOx family of air pollutants, includes NO2 (nitrogen dioxide) which is the most abundant in the atmosphere that is generated by human activities, as mentioned above. NO2 creates air pollution, ozone and acid rain; all which negatively affect us and certain ecosystems. There is scientific evidence that indicates that just 6-7 hours of exposure to ground-level ozone, even at low concentrations, can reduce lung function and cause respiratory inflammation. When exposed to high levels of ozone for several months, it can cause permanent structural damage in the lungs. Ozone doesn’t just harm humans, but it is the culprit for billion dollar losses of agricultural crop yield loss and damage to the forest ecosystem.(2)

How can we control Nitrogen Oxides (NOx)?

Be mindful of the car you buy, do some research to how clean and environmentally friendly your new care really is. When the words environmentally friendly and cars come together, most people think of slow boring cars which might not be too appealing. But there are other options, such as the Volkswagen Passat, and the Porsche Cayenne; they are both diesel models that use Diesel Exhaust Fluid to greatly reduce emissions. Industrial plants are now being regulated in the U.S and must have NOX control systems, in order to be in compliance. In fact, today August 3rd 2015, President Obama is announcing the Clean Power Plan, to cut carbon emissions from the power sector by 32% by 2030, compared with 2005 levels.  There are still many countries that have not adopted  NOX control standards for electric power plants or the mobile industry. It is important for these strict standards to be in place all over the world and not just in some countries, quoting President Obama ,” If we don’t do it nobody will. America leads the way forward…that’s what this plan is about. This is our moment to get something right and get something right for our kids.”

 

final-draft-noxguard Has spent many years on the technical process of making urea solution for NOx control in the automotive industry, and has the quality needed to provide industrial plants with the NOx control solution they need. Stay tuned for part II of this blog ,  Where Product Quality Matters.

 

 

 

 

References:

1.Nitrogen Oxides (NOx) Why and How they are Controlled

http://www.epa.gov/ttncatc1/dir1/fnoxdoc.pdf

 

2. “Health Effects of Air Pollution”. United States Environmental Protection Agency. June 30th, 2015.