CO2 solubility and species distribution in aqueous solutions of 2-(isopropylamino)ethanol and its structural isomers

Yamada, Hidetaka; Chowdhury, Firoz Alam; Goto, Kazuya; Higashii, Takayuki

doi:10.1016/j.ijggc.2013.03.027

Cited by 66 publications

(53 citation statements)

References 28 publications

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“…The existence of -CH 2 deformation of alkyl chain structural arrangement at 1473 and 1465 cm -1 are further confirm the presence of dispersed ODA on SiO 2 surfaces [16]. A strong and broad band at 1567 cm -1 is associated to -NH 2 bending vibration of primary amine [17]. Besides, two absorption bands of asymmetric and symmetric deformation of -NH 3+ exist at 1643 and 1485 cm -1 on the ODA spectrum.…”

Section: Resultssupporting

confidence: 65%

Modification of Porous Materials by Saturated Fatty Amine as CO2 Capturer

Tahari¹,

Hakim²,

Hisham³

et al. 2015

IJCEA

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the common porous materials being used as CO 2 capturer. In this work, saturated fatty amine (octadecylamie,ODA) was evaluated as a potential source of basic sites for CO 2 capture. Both commercial SiO 2 and AC were used as preliminary supports in order to study the effect of loading. The amine-modified samples were characterized using x-ray diffractometer (XRD), attenuated total reflextance/fourier transform infrared spectroscopy (ATR/FTIR), and Brunauer-Emmet-Teller (BET). Reactivity of solid sorbents towards CO 2 was evaluated using isothermal CO 2 adsorption by BET technique. This study shows that the order of CO 2 adsorption capacity by SiO 2 type adsorbents are 25 ODA/SiO 2 > SiO 2 > 15 ODA/SiO 2 > 5 ODA/SiO 2 whereas AC > 5 ODA/AC > 15 ODA/AC > 25 ODA/AC for AC type adsorbents. However, the promotion of ODA compounds on the AC was not improving the CO 2 uptake significantly due to pore blockage and drastic reduction in microporous surface area and pore volume of AC.Index Terms-Adsorption, amine impregnation, CO 2 capture. I. INTRODUCTIONCarbon dioxide is one of green house gases, known as main anthropogenic contributors to climate change which has drawn significant attention to researchers in looking to develop strategies for reducing the CO 2 emissions and concentration. Increasing concentration of CO 2 contributes to global warming and climate changes that give critical effects to environment, infrastructures and human. There were several works reported in reducing CO 2 concentration by capture and separate the CO 2 gas. There are different unit operations such as liquid absorption, cryogenic techniques [6], and selective diffusion through polymer, metallic or ceramic membranes [7].The development of solid sorbents has focused on the modification of solid surfaces with usually having amine compounds. The solid sorbents should have a porous structure to be filled with amine compounds to enable the retention of CO 2 molecules. The commonly used porous solid supports are silica fume [8] [12], and hydrotalcyte [13]. However, application of solid sorbents together with octadecylamine (ODA) as CO 2 capturer is still limited. Selected porous materials for this study are silica dioxide (SiO 2 ) and activated carbon (AC). SiO 2 and AC surfaces will be modified with ODA compounds by impregnation method to develop high dispersion of amine and thus will give better CO 2 adsorption performance. Hence, the objective of this study is to characterize and explore the effect of ODA compounds supported on the surface of SiO 2 and AC towards CO 2 adsorption capacity. II. PROCEDURES AND METHODSSilica-amine adsorbent was prepared by use of wet impregnation. Firstly, commercial silica dioxide, SiO 2 received from Fluka was calcined at 400 °C for 4 hours in air before impregnated with octadecylamine, ODA (ALDRICH ® , 97%). Chloroform, CHCl 3 (SYSTERM ® , 99-99.4%) was added to dissolve the ODA. After stirring for 4 hours in a close system, the mixture was rested for 1 hour before sonicate (S 4000-010 Sonicator 4000). The mixtu...

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Section: Resultssupporting

confidence: 65%

Modification of Porous Materials by Saturated Fatty Amine as CO2 Capturer

Tahari¹,

Hakim²,

Hisham³

et al. 2015

IJCEA

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“…• Solvents PAE, IPAE 120 , TMEDA 121 and 5AP [7][8][9] have been investigated considerably less than the other solvents and mainly with respect to their CO 2 absorption capacity hence they may be worth of further investigation.…”

Section: 13mentioning

confidence: 99%

Computer-aided molecular design and selection of CO₂ capture solvents based on thermodynamics, reactivity and sustainability

Παπαδόπουλος

Badr

Chremos

et al. 2016

Mol. Syst. Des. Eng.

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We propose a Computer Aided Molecular Design (CAMD) method which employs optimization to support the synthesis and selection of high performance molecules for use in process systems and to guide experimental efforts. The method can be used to address challenging applications where a) the desired molecules exhibit phase and chemical equilibrium, b) numerous combinations of molecules need to be evaluated, and c) multiple criteria must be considered to capture the effects of molecular chemistry on the process system performance. The method is applied to the design of solvents in chemical absorption processes for the separation of carbon dioxide (CO 2 ) from gas streams. The molecular design problem is first approached via a fast screening stage where molecules are evaluated based on the simultaneous consideration of multiple performance indices pertaining to thermodynamics, reactivity and sustainability. A few high-performance solvents are further evaluated using an advanced group contribution equation of state to predict reliably the highly non-ideal equilibrium behavior of solvent-water-CO 2 mixtures. Several promising novel solvents for CO 2 capture are proposed and can now be assessed experimentally. The proposed method can readily be applied to other chemical absorption processes to accelerate the identification of novel solvents. AbstractThe identification of improved carbon dioxide (CO 2 ) capture solvents remains a challenge due to the vast number of potentially-suitable molecules. We propose an optimization-based computer-aided molecular design (CAMD) method to identify and select, from hundreds of thousands of possibilities, a few solvents of optimum performance for CO 2 chemisorption processes, as measured by a comprehensive set of criteria. The first stage of the approach consists in a fast screening stage where solvent structures are evaluated based on the simultaneous consideration of important pure component properties reflecting thermodynamic, kinetic, and sustainability behaviour. The impact of model uncertainty is considered through a systematic method that employs multiple models for the prediction of performance indices. In a second stage, high-performance solvents are further selected and evaluated using a more detailed thermodynamic model, namely the group-contribution statistical associating fluid theory for square well potentials (SAFT-γ SW), to predict accurately the highly non-ideal chemical and phase equilibrium of the solvent-water-CO 2 mixtures. The proposed CAMD method is applied to the design of novel molecular structures and to the screening of a dataset of commercially available amines. New molecular structures and commercially-available compounds that have received little attention as CO 2 capture solvents are successfully identified and assessed using the proposed approach. We recommend that these solvents given priority in experimental studies to identify new compounds.

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“…Among the most promising absorbents, the tertiary amine 2-(diethylamino)ethanol [4,5], and two secondary amines, 2-(ethylamino)ethanol [6], and 2-(isopropylamino)ethanol [7,8] were selected for a thermodynamic characterization in this work. Structurally, they only differ in the type and number of alkyl substituents of the amine functional group.…”

Section: Introductionmentioning

confidence: 99%

“…El Hadri et al [6] also characterized 30 amines, highlighting 2-(ethylamino)ethanol as a good alternative to 2-aminoethanol, presenting good carbon dioxide absorption, low heat of absorption and high kinetic reaction. Finally, Yamada et al [8] have studied the moderately hindered amine 2-(isopropylamino)ethanol, reporting a high absorption rate and large desorption capability compared to conventional amines.…”

Section: Introductionmentioning

confidence: 99%

Vapor pressures and thermophysical properties of selected ethanolamines

Soares

Štejfa

Ferreira

et al. 2018

Fluid Phase Equilibria

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a b s t r a c tA thermodynamic study of three ethanolamines, 2-(diethylamino)ethanol, 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol, reporting the measurements of vapor pressure, liquid phase heat capacities, and phase behavior is presented in this work. The vapor pressures were measured using a static method in the temperature interval 238e343 K. After a critical assessment of literature data, selected experimental data were correlated using the Cox equation. The liquid phase heat capacities were measured in the temperature range 265e355 K using Tian-Calvet calorimetry and the phase behavior was investigated using differential scanning calorimetry (DSC) starting from 183 K. For 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol, two monotropically related crystalline forms were identified. To our knowledge, vapor pressure and heat capacity for 2-(isopropylamino)ethanol and phase behavior data for 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol are reported for the first time in this work.

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CO2 solubility and species distribution in aqueous solutions of 2-(isopropylamino)ethanol and its structural isomers

Cited by 66 publications

References 28 publications

Modification of Porous Materials by Saturated Fatty Amine as CO2 Capturer

Modification of Porous Materials by Saturated Fatty Amine as CO2 Capturer

Computer-aided molecular design and selection of CO₂ capture solvents based on thermodynamics, reactivity and sustainability

Vapor pressures and thermophysical properties of selected ethanolamines

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CO2 solubility and species distribution in aqueous solutions of 2-(isopropylamino)ethanol and its structural isomers

Cited by 66 publications

References 28 publications

Modification of Porous Materials by Saturated Fatty Amine as CO2 Capturer

Modification of Porous Materials by Saturated Fatty Amine as CO2 Capturer

Computer-aided molecular design and selection of CO2 capture solvents based on thermodynamics, reactivity and sustainability

Vapor pressures and thermophysical properties of selected ethanolamines

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Product

Resources

About

Computer-aided molecular design and selection of CO₂ capture solvents based on thermodynamics, reactivity and sustainability