Adsorption of carbon dioxide in monoethanolamine solvent using surface method
Carbon dioxide gas is one of the main environmental pollutants that can cause irreparable damage by climate change; Therefore, solving this problem requires serious attention. At present, chemical adsorption of CO2 with aqueous solutions of alkanoamines is the most common commercial separation method with high efficiency in the industry. Among the various methods of removing carbon dioxide from flue gases, the monoethanolamine (MEA) aqueous solvent adsorption process has been the most important option in industrial applications in recent years. In this research, MEA solvent has been used to evaluate the amount of CO2 absorption. The experimental range of the studied components includes temperature of 20-60 degrees Celsius, pressure of 3.5-9.5 times and solvent concentration of 2.5-8.5% by weight. Loading and CO2 uptake percentages in MEA aqueous solution were obtained in the range of 0.70-2.615 and 17.81-48.65%, respectively. Analysis of the results A quadratic polynomial pattern with response level method (RSM)…
What are the other types of amine
In the following table, the first, second and third types of amines are compared in terms of commonly used concentrations and adsorption capacity of acid gases: Amine name Molecular Weight Normal concentration (weight percentage) Acid adsorption capacity (IB MOL / T) Monoethanolamine 61 15-20 2.53 Diethanolamine 105 25-35 2.52 Methyl diethanolamine 119 35-50 4.16 Also, the first and second type amines react directly and rapidly with hydrogen sulfide and carbon dioxide. The third type of amine reacts directly and rapidly with hydrogen sulfide, but reacts slowly with carbon dioxide in two steps. Therefore, by limiting the contact time of amines and acid gases, hydrogen sulfide can be selectively separated. Properties of monoethanolamine Advantages Disadvantages High reactivity Wasted up due to evaporation low price High energy required for regeneration Possibility of separation of carbonyl sulfide and carbon disulfide Impossibility of selective separation of hydrogen sulfide in the presence of carbon dioxide…
Production method of monoethanolamine
Monoethanolamine is obtained from the reaction between ammonia and ethylene oxide. This reaction produces diethanolamine and triethanolamine in addition to monoethanolamine. The production ratio of different products can be adjusted by changing the stoichiometry of the reaction. This reaction is thermal and should prevent the temperature from rising and reaching the flash point. Ethylene oxide reacts slowly with ammonia, adding water to speed up the reaction. In processes without water, a fixed bed catalytic reactor with ion exchange resins or zeolite and clay is used. The whole process takes place in the liquid phase and the pressure in the reactor is high enough to prevent ethylene oxide and ammonia from evaporating at the reaction temperature. Monoethanolamine is recommended as a substance for making alkanolamides because of its reaction with fatty acid or coconut oil. As a result of its properties, this product is used in various industrial sectors such as…
MSDS and applications for MEA
Mono Ethanol amine Specifications of monoethanolamine Monoethanolamine derivatives can be found in biological polymers such as lipids, where animal and plant physiological processes such as seed germination, chloroplasts, flowering process, etc. must be performed. Ethanolamine compounds also belong to a group of amino acids. Other names for this product include ethanolamine, including monoethanolamine, 2-aminoethanol and MEA. Types of ethanolamines Monoethanolamine Diethanolamine triethanolamine Specifications of monoethanolamine Properties of MEA Name of product Ethanol amine Molecular weight 61.08 g / mol density 1.01 g / cm3 Boiling point 170 ° C Melting point 10.3° C Appearance Liquid Odour Smells like ammonia Purity 98 to 99 % Solubility in water Solution In general, the production of ethanolamines, which is a class of amines, consists of three stages Synthesis Ammonia distillation Isolation of different species of ethanolamines This product is created by the reaction between ethylene oxide and aqueous ammonia solution, which causes the…