Heat of absorption and absorption capacity of CO2 in aqueous solutions of amine containing multiple amino groups

Kim, Youngeun; Moon, Sungjun; Yoon, Yeo Il; Jeong, Soon Kwan; Park, Ki Tae; Bae, Shin Tae; Nam, Sung Chan

doi:10.1016/j.seppur.2013.10.030

Cited by 94 publications

(56 citation statements)

References 31 publications

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“…In favor of this approach we have chosen to perform a series of acid−base titrations of solutions containing 3-PM and Na 2 CO 3 , with various amounts of hydrochloric acid, to establish a series of samples covering the typical range of pH conditions where the carbamate is present and at a fixed amine concentration and CO 2 loading. This approach allows the accurate preparation and delivery of both the amine and CO 2 (as CO 3 2− initially) to the sample without introducing small but often significant errors associated with evaporative losses (both solvent and water) during the CO 2 bubbling and liquid sampling processes and gaseous loss of CO 2 from the samples.…”

Section: Co 2 Absorption Flux N Co2 and Overall Massmentioning

confidence: 99%

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CO₂ Absorption into Aqueous Solutions Containing 3-Piperidinemethanol: CO₂ Mass Transfer, Stopped-Flow Kinetics, ¹H/¹³C NMR, and Vapor–Liquid Equilibrium Investigations

Conway

Beyad

Maeder

et al. 2014

Ind. Eng. Chem. Res.

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Global efforts to reduce carbon dioxide emissions stemming from the combustion of fossil fuels have acknowledged and focused on the implementation of post combustion capture (PCC) technologies utilizing aqueous amine solvents to fulfill this role. The cyclic diamine solvent piperazine has received significant attention for application as a CO 2 capture solvent, predominantly for its rapid reactivity with CO 2 . A thorough investigation of alternative but simpler cyclic amines incorporating a single amine group into the cyclic structure may reveal further insight into the superior kinetic performance of piperazine and the wider applicability of such cyclic solvents for PCC processes. One such example is the cyclic monoamine 3-piperidinemethanol (3-PM). To facilitate the evaluation of 3-PM as a capture solvent requires knowledge of the fundamental chemical parameters describing the kinetic and equilibrium of the reactions occurring in solutions containing CO 2 and 3-PM. Additionally, in parallel with the preceding, experimental measurements of CO 2 absorption into 3-PM solutions, including mass transfer and vapor−liquid equilibrium measurements, can be used to validate the CO 2 absorption performance in 3-PM solutions and compared to that of monoethanolamine (MEA) under similar conditions. The present study is focused in two parts on (a) determination of fundamental kinetic and equilibrium constants via the analysis of stopped-flow kinetic and quantitative equilibrium measurements via 1 H/ 13 C nuclear magnetic resonance (NMR) spectroscopy and (b) experimental measurements of CO 2 absorption into 3-PM solutions via wetted wall column kinetic measurements, vapor−liquid equilibrium measurements, and corresponding physical property data including densities and viscosities of the amine solutions over a range of concentrations and CO 2 loadings. Fundamental kinetic rate constants describing the reaction of CO 2 with 3-PM are significantly faster than MEA at similar temperatures (3-PM = 32 × 10 3 M −1 s −1 , extrapolated to 40°C from kinetic data between 15.0 and 35.0°C; MEA = 13 × 10 3 M −1 s −1 , 40°C). Conversely, the equilibrium constants describing the reaction between bicarbonate and amine, often termed carbamate stability constants, are significantly lower for 3-PM than MEA at similar temperatures. Overall CO 2 absorption rates in 3.0 M solutions of 3-PM and MEA, assessed in overall CO 2 mass transfer coefficients, are lower in the former case over the entire range of CO 2 loadings from 0.0 to 0.4 mol of CO 2 per mol of amine. The reduced absorption rates in the 3-PM solutions can be attributed to higher solution viscosities and thus corresponding reductions in CO 2 diffusion. CO 2 absorption and cyclic capacities in 3.0 M solutions of 3-PM and MEA were found to be significantly higher in the case of 3-PM. The larger CO 2 capacities are attributed to the lower stability 3-PM carbamate and the formation of larger amounts of bicarbonate compared to MEA. Overall, the larger CO 2 absorption capacity, cyclic capacity, ...

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Section: Co 2 Absorption Flux N Co2 and Overall Massmentioning

confidence: 99%

“…Initially, a carbamate solution containing 0.025 M 3-PM and 0.05 M HCO 3 − was prepared and equilibrated for 24 hours at the desired temperature. The composition of the equilibrated carbamate solution was determined quantitatively using 1 H NMR spectroscopy prior to the stopped-flow measurements.…”

Section: Introductionmentioning

confidence: 99%

CO₂ Absorption into Aqueous Solutions Containing 3-Piperidinemethanol: CO₂ Mass Transfer, Stopped-Flow Kinetics, ¹H/¹³C NMR, and Vapor–Liquid Equilibrium Investigations

Conway

Beyad

Maeder

et al. 2014

Ind. Eng. Chem. Res.

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“…Heat of absorption is directly associated with the energy required to regenerate absorbent. Heat of absorption is also a significant factor to recycle the CO 2 in glycerol [17]. The enthalpy change that occurs when CO 2 gas absorbed into glycerol can be described using the Van't Hoff equation [18].…”

Section: Effect Of Temperaturementioning

confidence: 99%

CO₂ Absorption from Biogas by Glycerol: Conducted in Semi-Batch Bubble Column

Lestari

Mindaryani

Wirawan

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Biogas is a renewable energy source that has been developed recently. The main contents of Biogas itself are Methane and carbon dioxide (CO 2 ) where Methane is the main component of biogas with CO 2 as the highest impurities. The quality of biogas depends on the CO 2 content, the lower CO 2 levels, the higher biogas quality. Absorption is one of the methods to reduce CO 2 level. The selections of absorbent and appropriate operating parameters are important factors in the CO 2 absorption from biogas. This study aimed to find out the design parameters for CO 2 absorption using glycerol that represented by the overall mass transfer coefficient (K L a) and Henry's constant (H). This study was conducted in semi-batch bubble column. Mixed gas was contacted with glycerol in a bubble column. The concentration of CO 2 in the feed gas inlet and outlet columns were analysed by Gas Chromatograph. The variables observed in this study were superficial gas velocity and temperatures. The results showed that higher superficial gas velocity and lower temperature increased the rate of absorption process and the amount of CO 2 absorbed.

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“…Thus, knowledge of the solubility of the acid gases in blended amines is necessary in the design of industrial gas absorption units. However, most of the equilibrium data is devoted to the solubility of CO 2 [15][16][17][18], and less data are available for H 2 S solubility particularly in blended alkanolamines. The several works [19,20] for solubility of H 2 S in alkanolamines are given as follows.…”

Section: Introductionmentioning

confidence: 99%

Solubility and thermodynamic modeling of hydrogen sulfide in aqueous (diisopropanolamine+2-amino-2-methyl-1-propanol+piperazine) solution at high pressure

Haghtalab

Izadi

2015

The Journal of Chemical Thermodynamics

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Heat of absorption and absorption capacity of CO2 in aqueous solutions of amine containing multiple amino groups

Cited by 94 publications

References 31 publications

CO₂ Absorption into Aqueous Solutions Containing 3-Piperidinemethanol: CO₂ Mass Transfer, Stopped-Flow Kinetics, ¹H/¹³C NMR, and Vapor–Liquid Equilibrium Investigations

CO₂ Absorption into Aqueous Solutions Containing 3-Piperidinemethanol: CO₂ Mass Transfer, Stopped-Flow Kinetics, ¹H/¹³C NMR, and Vapor–Liquid Equilibrium Investigations

CO₂ Absorption from Biogas by Glycerol: Conducted in Semi-Batch Bubble Column

Solubility and thermodynamic modeling of hydrogen sulfide in aqueous (diisopropanolamine+2-amino-2-methyl-1-propanol+piperazine) solution at high pressure

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Heat of absorption and absorption capacity of CO2 in aqueous solutions of amine containing multiple amino groups

Cited by 94 publications

References 31 publications

CO2 Absorption into Aqueous Solutions Containing 3-Piperidinemethanol: CO2 Mass Transfer, Stopped-Flow Kinetics, 1H/13C NMR, and Vapor–Liquid Equilibrium Investigations

CO2 Absorption into Aqueous Solutions Containing 3-Piperidinemethanol: CO2 Mass Transfer, Stopped-Flow Kinetics, 1H/13C NMR, and Vapor–Liquid Equilibrium Investigations

CO2 Absorption from Biogas by Glycerol: Conducted in Semi-Batch Bubble Column

Solubility and thermodynamic modeling of hydrogen sulfide in aqueous (diisopropanolamine+2-amino-2-methyl-1-propanol+piperazine) solution at high pressure

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CO₂ Absorption into Aqueous Solutions Containing 3-Piperidinemethanol: CO₂ Mass Transfer, Stopped-Flow Kinetics, ¹H/¹³C NMR, and Vapor–Liquid Equilibrium Investigations

CO₂ Absorption into Aqueous Solutions Containing 3-Piperidinemethanol: CO₂ Mass Transfer, Stopped-Flow Kinetics, ¹H/¹³C NMR, and Vapor–Liquid Equilibrium Investigations

CO₂ Absorption from Biogas by Glycerol: Conducted in Semi-Batch Bubble Column