AIR QUALITY ANALYSIS

AIR QUALITY ANALYSIS

 

An important element in emission control technology design and implementation is the utilization of reference test methods used to evaluate equipment performance.  Universal acceptance of the validity of such methods is essential to the proper functioning of the commercial marketplace for emission control systems; i.e., customers want to know that the equipment being acquired really works.

Since the passage of the original Clean Air Act in 1970, the United States Environmental Protection Agency (EPA) has led the way in researching and promulgating formal test methods directed toward satisfying this need.  These EPA methods for quantifying a wide variety of pollutants from point, fugitive, and mobile sources as well as ambient air, are accepted around the world by many countries as the reference standards.  The complete list of all promulgated and pending test methods is voluminous and can be found here:
https://www.epa.gov/measurements-modeling/index-epa-test-methods
In addition, the promulgated methods that are specific to air emission measurements can be found here:
https://www.epa.gov/emc/emc-promulgated-test-methods

Within this list of air emission test methods, there are several methods that are commonly relevant to the design and implementation of air pollution control systems.  A brief summary of each of these follows.  Note that many of these have related methods (i.e., Methods 5A, 5B, 5C, etc.) that are designed for specific stack sampling situations.

Gas Velocity and Flow

Methods 1 & 2


Prescribes the way a duct or stack should be traversed using a pitot tube to measure velocity pressure to calculate velocity and flow rate.

Molecular Weight of Stack Gases

Method 3


Provides for the measurement of CO2 , O2 , N2 with an Orsat apparatus.

Water Vapor Content

Method 4


Utilizes a wet condensation extractive technique to quantify the amount of water vapor in a gas stream.

Particulate Matter

Method 5


Determines the concentration of filterable particles in the gas stream by an extractive, gravimetric method.

Sulfur Dioxide

Method 6


Utilizes a wet chemical, titrimetric, extractive method for SO2 concentration.

Nitrogen Oxides

Method 7E


Utilizes a continuous on-line analyzer to determine both NO and NO2 concentrations.

SO3 and Sulfuric Acid Mist

Method 8


Utilizes an extractive, titrimetric method for SO3/H2SO4.

Opacity

Method 9


Relies on the observations of a trained individual to quantify plum opacity.

Particulate Matter (PM)

Method 17


Utilizes an in-stack filter to gravimetrically quantify the filterable PM at stack conditions.

Volatile Organic Compounds (VOCs)

Method 18


Utilizes a grab sample with off-line gas chromatography to characterize the VOCs in the gas stream by species.

Volatile Organic Compounds (VOCs)

Method 25A


Utilizes a continuous, on-line flame ionization detector to quantify VOCs as propane or carbon.

Condensable Particulate Matter

Method 202


An extractive method that provides for the quantification of condensable PM that is not caught on a filter. This method is generally coupled with Method 5 or 17 which provide for the filterable portion of the sample.

Dustex - Clean Air Technologies

Dustex is a global supplier of engineered systems that reduce air emissions and improve operational efficiencies. We are at the forefront of engineered solutions for clean air technologies with an exceptional and experienced staff. Our outstanding service combined with our wide breadth of technology allows us to provide practical and economical solutions for our customers that fit their unique needs.

 

Contact Details

Dustex - Clean Air Technologies

Corporate Office

60 Chastain Center Blvd NW, Ste 60
Kennesaw, GA 30144 USA

Send us a message

Dustex is a global supplier of engineered systems that reduce air emissions and improve operational efficiencies. We are at the forefront of engineered solutions for clean air technologies with an exceptional and experienced staff. Our outstanding service combined with our wide breadth of technology allows us to provide practical and economical solutions for our customers that fit their unique needs.

Contact Details

Corporate Office 
60 Chastain Center Blvd NW, Ste 60
Kennesaw, GA 30144 USA

info@dustex.com

770-429-5575

Send us a message

© 2018 Dustex - Clean Air Technologies. All Rights Reserved.

EPA regulations support or require NOx control installations to achieve the lowest emissions level possible. Two of the solutions for post-combustion control systems are Selective Non-Catalytic Reduction (SNCR) and Selective Catalytic Reduction (SCR).   Both are of the most cost-effective and fuel-efficient technologies used to reduce stationary source emissions. Utilizing our field experience and injection technology, Dustex offers complete SCR and SNCR NOx control systems for various plants. State-of-the-art design, simulation, and technology ensure advantages with results that will surpass your requirements and meet guarantees.

© 2018 Dustex - Clean Air Technologies. All Rights Reserved.