Experiments on the Kinetics and Solubility of CO2 in AMP-PZ Aqueous Solutions

2013 ◽  
Vol 411-414 ◽  
pp. 2989-2992
Author(s):  
Dong Fu ◽  
Hong Mei Wang ◽  
Lei Xia Du
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Mass Fraction ◽  
Absorption Rate ◽  
Normal Pressure

The solubility and saturated loading of CO2in piperazine (PZ) promoted 2-amino-2-methyl-1-propanol (AMP) aqueous solution were measured at normal pressure with temperatures ranging from 293.15K to 323.15K. The temperature and the mass fraction dependences of the solubility and saturated loading of CO2were determined. The influence of the mass fraction of PZ on the absorption rate of CO2was illustrated.

Experiments on the Kinetics and Activation Mechanism of CO2 Loaded MEA-MDEA Aqueous Solutions

2012 ◽  
Vol 610-613 ◽  
pp. 1213-1217 ◽  
Author(s):  
Dong Fu ◽  
Lin Wei ◽  
Xiang Fei
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Mass Fraction ◽  
Absorption Rate ◽  
Normal Pressure ◽  
Activation Mechanism

The solubility and absorption rate of CO2 in monoethanolamine (MEA) promoted N-methyldiethanolamine (MDEA) aqueous solution were measured at normal pressure with temperatures ranging from 303.15-323.15K. The temperature and the mass fraction dependences of the solubility of CO2 and CO2 loading were determined. The influence of the mass fraction of MEA on the absorption rate of CO2 was illustrated.

Experiments on the Kinetics of CO2 Loaded MDEA-DEA Aqueous Solution

2014 ◽  
Vol 955-959 ◽  
pp. 2306-2309
Author(s):  
Shu Bin Zhao ◽  
Pan Zhang ◽  
Xiao Tong Cai ◽  
Dong Fu
Keyword(s):  
Aqueous Solution ◽  
Mass Fraction ◽  
Absorption Rate ◽  
Normal Pressure ◽  
Influence Of Temperature ◽  
Kinetics Of

The absorption rates of CO2 in diethanolamine (DEA) promoted N-methyldiethanolamine (MDEA) aqueous solution were measured at normal pressure with temperatures ranging from 303.15-323.15K. The influence of temperature and the mass fraction of DEA on the absorption rate of CO2 was illustrated.

scholarly journals CO2 Capture by Absorption in Activated Aqueous Solutions of N,N-Diethylethanoloamine

2017 ◽  
Vol 24 (2) ◽  
pp. 239-248 ◽  
Author(s):  
Ewelina Kruszczak ◽  
Hanna Kierzkowska-Pawlak
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Co2 Capture ◽  
Tertiary Amine ◽  
Absorption Rate ◽  
Absorption Process ◽  
Promising Technique ◽  
Gas Streams ◽  
Hindered Amines ◽  
Amine Solutions

Abstract The CO2 absorption process using aqueous amine solutions has been the most promising technique used for the removal of CO2 from gas streams in energy sector. In recent years, many researchers tested solutions which are composed of several compounds: a slow reacting tertiary amine- and a fast amine acting as an activator. In this paper, the CO2 absorption rate in an aqueous solution of N,N-diethylethanoloamine (DEEA) and activated solutions DEEA is investigated experimentally. The activators considered are sterically hindered amines: 2-amino-2-methyl-1-propanol (AMP), 2-amino-2-methyl-1,3-propanediol (AMPD) and N-methyl-1,3-propanediamine (MAPA) from the group of polyamines. The experiments were conducted over the temperature range of 303-333 K and the total amine concentration of 2 M. From the CO2 absorption experiments into mixed aqueous solutions of DEEA and MAPA, it was found that the addition of small amounts of MAPA into aqueous DEEA solutions has a significant effect on the enhancement of the CO2 absorption rate. The application of hindered amines: AMP or AMP as activators resulted in a marginally improvement of the absorption rate of CO2.

Investigation of the Solubility and Absorption Rate of CO2 in DEA Promoted K2CO3 Aqueous Solution

2013 ◽  
Vol 668 ◽  
pp. 174-177
Author(s):  
Dong Fu ◽  
Xiang Cheng Wu ◽  
Hui Min Hao
Keyword(s):  
Aqueous Solution ◽  
Potassium Carbonate ◽  
Mass Fraction ◽  
Absorption Rate ◽  
Experimental Results ◽  
Mass Fractions

The solubility and absorption rate of CO2 in diethanolamine (DEA) promoted potassium carbonate (K2CO3 ) aqueous solution were measured at 1 atm, with temperatures ranging from 328.15 to 343.15K. The influence of the mass fractions of DEA (w)on the solubility, CO2 loading and absorption rate was illustrated. The experimental results show that at a given mass fraction of K2CO3, the solubility and CO2 loading respectively increases and decreases with increasing w. When w is less than 0.02, the absorption rate increases very rapidly with increasing w, however, exceeding this value, the absorption rate increases slowly.

scholarly journals Speciation in CO2-loaded aqueous solutions of sixteen triacetoneamine-derivates (EvAs) and elucidation of structure-property relationships

2021 ◽  
Author(s):  
Elmar Kessler ◽  
Luciana Ninni ◽  
Tanja Breug-Nissen ◽  
Benjamin Willy ◽  
Rolf Schneider ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Spectroscopic Study ◽  
Mass Fraction ◽  
Chemical Structure ◽  
Ring Structure ◽  
Important Influence ◽  
Co2 Absorption ◽  
Structure Property ◽  
Structure Property Relationships

The speciation in CO2-loaded aqueous solutions of 16 different derivates of triacetoneamine (EvAs) was investigated in a comprehensive NMR-spectroscopic study. About 350 experiments were carried out for CO2-loadings up to 3 moles CO2 per mole amine, temperatures between 20 °C and 100 °C, and a mass fraction of EvA in the unloaded solvent of 0.1 g/g. The observed CO2-containing species were primary and secondary carbamates, alkylcarbonate, (bi)carbonate, and molecular CO2. Some EvAs can form zwitterions with a ring structure, which have an important influence on the speciation. From the comprehensive set of data, relationships between the chemical structure of the EvAs and the observed speciation in aqueous solution were established. These results were related to application properties of the EvAs that were taken from previous work. Based on the findings, some general guidelines for the design of new amines were derived and applied for proposing new amines for CO2-absorption.

scholarly journals Carbon Dioxide Absorption into Aqueous Blends of N-Methyldiethanolamine and 2-Ethylaminoethanol

2012 ◽  
Vol 33 (4) ◽  
pp. 547-561 ◽  
Author(s):  
Władysław Moniuk ◽  
Ryszard Pohorecki ◽  
Piotr Machniewski
Keyword(s):  
Carbon Dioxide ◽  
Mathematical Model ◽  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Absorption Rate ◽  
Elevated Temperatures ◽  
Carbon Dioxide Absorption ◽  
Absorption Column ◽  
New Process

Measurements of the absorption rate of carbon dioxide into aqueous solutions of N-methyldiethanoloamine (MDEA) and 2-ethylaminoethanol (EAE) have been carried out. On this basis a mathematical model of the performance of an absorption column operated with aqueous solution of a blend of the above amines at elevated temperatures and pressures have been proposed. The results of simulations obtained by means of this model are described. The work is a part of a wider program, aimed at the development of a new process.

scholarly journals Fast and efficient CO2 absorption in non-aqueous tertiary amines promoted by ethylene glycol

2021 ◽  
Author(s):  
Meisi Chen ◽  
Feng Zhang ◽  
Xiemin Liu ◽  
Xingbang Hu ◽  
Youting Wu
Keyword(s):  
Mass Fraction ◽  
Absorption Rate ◽  
Normal Pressure ◽  
Co2 Absorption ◽  
Tertiary Amines ◽  
Absorption Performance ◽  
Regeneration Cycle ◽  
Higher Temperature ◽  
Regenerative Energy ◽  
C Nmr

With the catalytic induction of EG, anhydrous DMEA shows CO absorption performance via chemical binding and physical storage under normal pressure. Among the absorbents, pure DMEA can hardly absorb CO directly but when the zwitterionic alkylcarbonates are formed between CO and DMEA-EG which can be characterized by C NMR and FTIR, the absorption rate of CO will be improved at this time. An increasing the CO loading as the mass fraction of EG in DMEA-EG, 90wt.% EG captures up to 0.72 mol/mol. The amount of chemically bound and physically stored is directly dependent on temperature, within the range of 293 to 323K, an absorption-regeneration cycle can be formed in a closed vessel because of the zwitterion DMEA-EG-CO is unstable at the higher temperature. In other words, DMEA-EG-CO can be easily regenerated upon appropriate depressurization or heating, corresponding thermodynamic calculations prove that the regenerative energy of DMEA-EG-CO is 25.49kJ/mol.

Effect of thermal history of aqueous solutions of KCl on the metastable zone width

1984 ◽  
Vol 49 (3) ◽  
pp. 559-569 ◽  
Author(s):  
Jaroslav Nývlt
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Thermal History ◽  
Equilibrium Solubility ◽  
Metastable Zone Width ◽  
Zone Width ◽  
Preceding Experiment ◽  
History Of ◽  
Metastable Zone ◽  
The Given

The metastable zone width of an aqueous solution of KCI was measured as a function of the time and temperature of overheating above the equilibrium solubility temperature. It has been found that when the experiments follow close upon one another, the parameters of the preceding experiment affect the results of the experiment to follow.The results are interpreted in terms of hypotheses advanced in the literature to account for the effect of thermal history of solution. The plausibility and applicability of these hypotheses are assessed for the given cause of aqueous solution of a well soluble electrolyte.

scholarly journals I. Thermo-electric behaviour of aqueous solutions with mercurial electrodes

1879 ◽  
Vol 29 (196-199) ◽  
pp. 472-482 ◽  
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Internal Diameter ◽  
Thermo Electric ◽  
Thin Glass ◽  
Mercury Surface

In order to investigate this subject, I devised and constructed the following apparatus :—A and B are two thin glass basins, 81 millims. internal diameter (= 5,153 sq. millims. of mercury surface), and 6·0 centims. deep; each containing a layer of mercury about 1·0 centim. deep, covered by a layer, about 3 centims. deep, of the aqueous solution to be examined.

scholarly journals Meta-studtite stability in aqueous solutions. Impact of HCO3−, H2O2 and ionizing radiation on dissolution and speciation

2021 ◽  
Author(s):  
Junyi Li ◽  
Zoltán Szabó ◽  
Mats Jonsson
Keyword(s):  
Aqueous Solution ◽  
Ionizing Radiation ◽  
Aqueous Solutions ◽  
Carbonate Complexes ◽  
C Nmr

Four different uranyl-(peroxide)-carbonate complexes were identified during studtite and meta-studtite dissolution in aqueous solution containing 10 mM HCO3− by 13C NMR.

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