ADDITIONAL MONO-PRESSURE PLANT DATA FROM LSB INDUSTRIES, INC. 

El Dorado Chemical Company, El Dorado, AR ---Weak Nitric Acid Units (Strong acid plant not included) 

1. Process information 

Design Production Rate of 100% nitric acid (in tons per day) East/West–400; DMW–400 ton/day

Typical Production Rate (tons per day when operating) East = 304 ton/day, West 288 tons/day, DMW 

= 285 tons/day,

Oxidation pressure (in pounds per square inch area [psia]) – East/West – 144.7 – 154.7 psia; DMW 

– 164.7 – 174.7 psia 

Absorption pressure (psia) - East/West – 114.7 – 124.7 psia; DMW – 134.7 – 144.7 psia

2. Extended absorption 

Length (ft) - East/West – None; DMW – 146 ft tower with 38 trays (trays 1-25 use cooling 

water in coils; trays 26-38 use chilled water)

 

Gal/1,000 ft3 -

 

Additive? NA. Water or condensate fed to mid-column for water balance.

 If yes - name of additive - 

 Concentration (%) - 

 Addition Rate(gallons/hr) - 

 2. NOx continuous emission data - we would prefer to have this data for one year, for the most recent 

 year that such data exist. To save your members time and also ours, 1 year of data is satisfactory. 

 These data should be in terms of lb of NOx/Ton of 100% nitric acid produced. Preferably the data 

should be hourly, if possible. NOx emissions (in lb/hr) should be determined by the procedure mentioned 

in Subpart G - Section 60.73. 

 3. For units controlled by SCR, please provide the following parameters: No SCR unit on DMW; 

Data below is for East/West Unit

 

Design Catalyst life (years) 10-15 yrs 

Actual Catalyst life (life of catalyst for the 1 yr test period) – Depends on when test period is. West 

SCR Catalyst was replaced in December 2011. East SCR Catalyst was replaced in August 2011.

 Catalyst is DNX -929 from Haldor Topsoe.

 Gas Flow rate (scfm) – 33,000 

 Ammonia injection rate (lb/hr) - 350

 Catalyst volume (m3) – 11.5 per SCR Unit (contains primary and secondary catalyst)

 Year operation began – SCR Catalyst changed per above

 Location of SCR (before or after gas expander) – After gas expander

 4. For units controlled by NSCR, please provide the following parameters: NA

 
Cherokee Nitrogen Company, Cherokee, AL ---No 2. Nitric Acid Unit 

 1. Process information 

 Design Production Rate of 100% nitric acid (in tons per day) 600 (per previous Title V)

 Typical Production Rate (tons per day) 575

 Single Pressure - 

 Oxidation pressure (in pounds per square inch area [psia]) - ~160 - 175 psia

 Absorption pressure (psia) - ~150 - 165 psia

 2. Extended absorption 

 

Length (ft) – 180 ft tower,

 

Gal/1,000 ft3 - See attached calculation:

Additive? See attached:

 If yes - name of additive - 

 Concentration (%) - 

 Addition Rate(gallons/hr) – 

Additional information: 

• Process technology: Weatherly

• Absorber operating pressure ~150 - 165 psia

• Whether the absorber is extended, using refrigerated water, etc. Extended. Refrigerated water 

at the top, cooling water at the bottom.

• Current permitted NOx limit 201 ppm

• Whether SCR, NSCR or other NOx control device (e.g. peroxide) is used. None.

• Location of control device (before or after absorber, etc.) N/A

• Type of reaction gas used (ammonia, natural gas) N/A

• SCR Info (type of catalyst used and volume, year installed, operating pressure, etc.) N/A