Enter your e-mail address to receive a report about latest news .

NoX

EXISTING  ABATEMENT  TECHNOLOGIES

More than a hundred processes attempting to provide a cost-effective alternative to the combination SCR wet FGD are currently under development that combine SO2 and NOx removal to reduce the design and operating complexity of these systems. Most of these processes are in the early development   stage and are not expected to be commercially available before the end of  2000. The main advantages and disadvantages of six selected categories are provided in the following table.  

In  general  the  existing  abatement  technologies  have  a  number  of drawbacks: 1.Complex, large volume and costly installations (made of inox), expensive catalyzers, high temperatures and/or high pressure environments, expensive materials (ammonia, hydrogen),  2. Typically, low emissions burners are being installed before the actual abatement technology which increases the total costs.  (The Lion Energy technology thrives on  high emissions content, so the installation of cleaner burners is not just redundant, but economically undesirable)  3.they do not eliminate entirely the Nox (SNCR: 30 - 50%)   4. the NOx  abatement from exhaust gases with concentrations below 0.5% is economically prohibitive.


     PROCESS
      ADVANTAGES
    DISADVANTAGES


ADSORPTION
REGENERATION
High temperature gas not required
Complex re-circulation complex
High removal efficiency
High sorbent cost
Low volume of waste loss
High flue gas pressure
Potentially marketable byproduct
 

FLUE GAS
ADDITION
High temperature gas not  required
High auxiliary power
SO2, Nox and particulate removal in one device
Potential for secondary emission (N2O)
Potentially marketable byproduct
Byproduct difficult to dispose of
WET
SCRUBBING ADDITIVE
Easily retrofitable to scrubbers
Complex and precise process needed
One device for SO2 and Nox removal
Wastes contain nitrogen sulphur compounds
Process also suitable for high sulphur coals
Flue gas reheating may be required
GAS - SOLID CATALYTIC OPERATIONS
No solids re circulation
High temperature gas needed
High SO2 and Nox removal
Acid collection adds complexity
Potentially marketable byproduct
Catalysts must be replaced periodically

ELECTRO -MECHANICAL
Mechanically simple
High auxiliary power required
One device for SO2 and Nox removal
High temperature gas required
No high volume wastes
 


DRY ALKALY
High temperature gas not required
High simultaneous SO2 and Nox removal may not be possible
Easily retrofitable to dry scrubbers
Wastes difficult to dispose of
 
Potential for secondary NOx emission

                    
<< Previous
 
Home           |           Products           |           Our mission           |           Strategic alliances           |           Investors relation           |           Contacts
Copyright © Lion Energy S.A. Privacy Policy.