Absorption characteristics of new solvent based on a blend of AMP and 1,8-diamino-p-menthane for CO2 absorption

J Environ Sci (China). 2012;24(5):897-902. doi: 10.1016/s1001-0742(11)60788-2.

Abstract

Aqueous 1,8-diamino-p-menthane (KIER-C3) and commercially available amine solutions were tested for CO2 absorption. A 2-amino-2-methyl-1-propanol (AMP) solution with an addition of KIER-C3 showed 9.3% and 31.6% higher absorption rate for CO2 than the AMP solution with an addition of monoethanolamine (MEA) and ammonia (NH3), respectively. The reaction rate constant for CO2 absorption by the AMP/KIER-C3 solution was determined by the following equation: k2,AMP/C3 = 7.702 x 10(6) exp (-2248.03/T). A CO2 loading ratio of the AMP/KIER-C3 solution was also 2 and 3.4-times higher than that of the AMP/NH3 solution and the AMP/MEA solution, respectively. Based on the experimental results, KIER-C3 may be used as an excellent additive to increase CO2 absorption capability of AMP.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Absorption
  • Ammonia / chemistry
  • Carbon Dioxide / isolation & purification*
  • Cyclohexane Monoterpenes
  • Cyclohexanes / chemistry*
  • Diamines / chemistry*
  • Diffusion
  • Ethanolamine / chemistry
  • Kinetics
  • Partial Pressure
  • Propanolamines / chemistry*
  • Solubility
  • Solutions
  • Solvents / chemistry*
  • Temperature

Substances

  • Cyclohexane Monoterpenes
  • Cyclohexanes
  • Diamines
  • Propanolamines
  • Solutions
  • Solvents
  • Carbon Dioxide
  • Ethanolamine
  • Ammonia
  • 2-amino-2-methyl-1-propanol
  • 4-(2-aminopropan-2-yl)-1-methylcyclohexan-1-amine