AN ISO 9001:2008 CERTIFIED COMPANY
    Methyl Diethanolamine (MDEA)
 
  • Services Given
  •  
     
  • Comparison of Amines
  •    
      -- back
    Comparison of various parameters of MEA,DEA and MDEA are given below in TABLES I-VI :
    Camparision of Amines

    TABLE I

    Solvent MEA DEA MDEA
    Concentration% 15 30 35-50
    Solvent Circulation GPM 100 100 100
    Acid Gas Removal Capacity MOL/HR 49.8 58.6 87.5
    Capacity Increase % (MEA BASE = 100) 100 118 175
     
    Performance of Media

    TABLE II

    Solvent Concentration% 35-50
    Solvent Circulation GPM 10-1600
    Rich MDEA Loading MOL/MOL 0.50
    Lean MDEA Loading MOL/MOL 0.01
    Reboiler Steam, #/GPM 0.67-0.85
    Lean MDEA Temperature 0F 130-160
    CO2 Slip, % CO2 Rejected 50
       
      Heat of reaction with H2S and CO2

    TABLE III

     
     
    Heat of reaction BTU/POUND
    Amines H2S CO2
    MDEA 450 577
    DEA 493 650
    MEA 650 820
       
      Selectivity and Capacity

    TABLE IV

     
     
    Capacity
    Amines Selectivity* Mol H2S/Mol Amine Mol CO2/Mol Amine
    MDEA 3.85 0.10 0.12
    DEA 2.27 0.09 0.32
    MEA 0.89 0.07 0.50

    *Selectivity is defined as ratio of (mole percent of H2S removed to mole percent of H2S in feed gas) to (mole percent of CO2 removed to mole percent of CO2 in feed gas)
       
      Recommended ranges of Amines Concentration - Rich and Lean Amines Loading

    TABLE V

     
    Amines Conc. Weight % Rich Loading M/M Lean Loading M / M
    MDEA 35-55 0.45-0.55 0.004-0.01
    DEA 25-30 0.35-0.40 0.05-0.07
    MEA 15-20 0.30-0.35 0.10-0.15
       
      Corrosion

    TABLE VI

     
    Solvent Corrosion Rate MPY
    30% Wt MEA
    32
    50% Wt DEA 25
    15% Wt MEA 13
    20% Wt DEA 8
    50% Wt MDEA 3
       
      developed by c comsys.com