2. Facts about: NOX = NO + NO2
An air pollutant – a brown reddish gas seen in smog
A by-product of combustion engines and high-temperature boilers
NO2 contributes to the creation of acid rain
Has detrimental influence on health:
Damage to lungs
Reduces body resistance to bacterial and viral diseases
Irritates lungs and eyes
Causes Pneumonia
Causes increased sensitivity in asthma patients

3. The January 2011 NOx environmental protection standard
Boilers up to 6 ton steam – 700 mg/cm NOx
Boilers over 6 tons steam – 350 mg/cm NOx
Gas standars – 200 mg/cm NOx

4. Particles emission standard
50 mg/cm for any size installation

5. Main methods of treating NOx
Selective Catalytic Reduction (SCR)
Selective Non – Catalitic Reduction (SNCR)
Low Nox Burner (LNB)

6. LNB – Low NOx Burner
This method treats NOx created as a product of combustion while using atmospheric nitrogen and oxygen
A method for combustion fuel in low temperature.
This method recycle the emission gases back into the combustion chamber in order to reduce the combustion temperature
The oxygen influencing the combustion is diluted thereby achieving:
A lower combustion temperature
Less oxygen is available for the creation of NOx
Disadvantages: More fuel consumption, a more expensive system

7. “Chemical warfare” against NOx SNCR SCR
System principles:
Injection of ammonia (NH3) or urea )NH2CONH2), into the combustion chamber at a temperature window of ºC
The chemical reaction products: Water )H2O),
Nitrogen (N(2 and carbon dioxide (CO2)
The chemical reaction with urea:
H2O+ NH2CONH CO2 + 2NH3
4NO + 4NH3 + O N2 + 6H2O

8. Selective Catalytic Reduction
A method of NOx reduction by 70-90%
For use in industry, diesel engines, large ships, gas turbine and automobiles
Method of operation:
Ammonia or urea is injected into the gas
Gas + Gas combustion product pass though a ceramic catalyst made of precious metals such as: Titanium oxide, Vanadium, Tungsten and others.
The catalyst is porous and has a bee-hive or plat form. The pours increase the surface area of the catalyst which facilitates effective reduction of NOx level.

9. System structure SCR

10. Selective Non – Catalitic Reduction NoxAway
A method in which diluted ammonia or urea is injected into the combustion chamber, at a point where the gas is at a temperature range between: ºC
In the SNCR method a 50% reduction in NOx emission is achieved. While still complying with applicable standards

11. System structure SNCR NoxAway

12. Advantages and disadvantages of both methods:
SNCR- NoxAway / Markit
SCR
Disadvantages:
Requires a lot of room in the plant.
A very expensive device
The catalyst is sensitive to contamination an blockages that cause ammonia leaks and increased production of NOX
Advantages:
70-90% effective in NOx reduction
Disadvantages:
Up to 50-60% effective in NOx reduction
Advantages:
A cheap device
Simple installation
Compact
Made in Israel and with local service
Reduces also particles emission

13. System photos
Nozzle installed in the steam boiler

14. The system installed on two boilers at Yafora Rehovot

15. Locations where Markit’s NSCR NoxAway system is installed
Yafora-Tavori juice industries, Rehovot (two devices)
Taro Pharmaceutical industries – Haifa
T.G.L - Yokneam
Teva-Tech – Ramat Hovav (two devices)
Agan Chemicals – Ashdod (5 devices)
And more…..