In situ Fourier Transform-Infrared (FT-IR) analysis of carbon dioxide absorption and desorption in amine solutions

Jackson, P.; Robinson, K.; Puxty, Graeme; Attalla, Moetaz I.

doi:10.1016/j.egypro.2009.01.131

Cited by 151 publications

(110 citation statements)

References 4 publications

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“…After adding CO2 into the 30 wt% MEA solutions, new peaks formed in the region of 1300-1600 cm −1 . The peaks at 1491, 1564 cm −1 are attributable to 2-hydroxyethylcarbamate vibrations and the peaks at 1322, 1385, and 1464 cm −1 correspond to the carbamate formation, which are consistent with the IR peak assignments for CO2-loaded MEA solution reported in the literature (Jackson et al, 2009). The same IR spectrum is observed from the 12-day of "CO2-replenishment" solution.…”

Section: Life Cycle Assessment Of Mea Solutionsupporting

confidence: 78%

A Novel Strategy for Carbon Capture and Sequestration by rHLPD Processing

Gupta

Tang

et al. 2016

Front. Energy Res.

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Monoethanolamine (MEA) scrubbing is an energy-intensive process for carbon capture and sequestration (CCS) due to the regeneration of amine in stripping towers at high temperature (100-120°C) and the subsequent pressurization of CO2 for geological sequestration. In this paper, we introduce a novel method, reactive hydrothermal liquid phase densification (rHLPD), which is able to solidify (densify) monolithic materials without using high temperature kilns. Then, we integrate MEA-based CCS processing and mineral carbonation by using rHLPD technology. This integration is designated as rHLPD-carbon sequestration (rHLPD-CS) process. Our results show that the CO2 captured in the MEA-CO2 solution was sequestered by the mineral (wollastonite CaSiO3) carbonation at a low operating temperature (60°C) and simultaneously monolithic materials with a compressive strength of ~121 MPa were formed. This suggests that the use of rHLPD-CS technology eliminates the energy consumed for CO2-MEA stripping and CO2 compression and also sequesters CO2 to form value-added products, which have a potential to be utilized as construction and infrastructure materials. In contrast to the high energy requirements and excessive greenhouse gas emissions from conventional Portland cement manufacturing, our calculations show that the integration of rHLPD and CS technologies provides a low energy alternative to production of traditional cementitious-binding materials.

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Section: Life Cycle Assessment Of Mea Solutionsupporting

confidence: 78%

A Novel Strategy for Carbon Capture and Sequestration by rHLPD Processing

Gupta

Tang

et al. 2016

Front. Energy Res.

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“…This work has been carried out over a two and a half year period, with several dedicated technicians performing the experiments; these have included various kinetics studies (chemometric modelling [8], nuclear magnetic resonance spectroscopy [9], thermogravimetric analysis [10] and Fourier transform infrared spectroscopy [11]) as well as loading or capacity measurements [12]. In addition, many of the CO 2 capture candidates were also synthesized in-house, at significant cost.…”

Section: Introductionmentioning

confidence: 99%

Insights into amine-based CO2 capture: an ab initio self-consistent reaction field investigation

2010

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Ab initio many-body perturbation theory (MP2/ 6-311??G(,dp)), density functional theory (B3LYP/6-31??G(d,p)) and self-consistent reaction field (IEF-PCM UA HF/6-31G(d)) calculations have been used to study the CO 2 capture reagents NH 3 , 2-hydroxyethylamine (MEA), diaminoethane (EN), 2-amino-1-propanol (2A1P), diethanolamine (DEA), N-methyl-2-hydroxyethylamine (N-methylMEA), 2-amino-2-methyl-1-propanol (AMP), trishydroxymethylaminomethane (tris), piperazine (PZ) and piperidine (PD). This study involved full conformational searches of the capture amines in their native and protonated forms, and their carbamic acid and carbamate derivatives. Using this data, we were able to compute Boltzmann-averaged thermodynamic values for the amines, carbamates and carbamic acid derivatives, as well as equilibrium constants for a series of 'universal' aqueous capture reactions. Important findings include (i) relative pK a values for the carbamic acid derivatives are a useful measure of carbamate stability, due to a particular chemical resonance which is also manifest in short computed N-CO 2 H bonds at both levels of theory, (ii) the computational results for sterically hindered amines such as AMP and tris are consistent with these species forming carbamates which readily hydrolyse and (iii) the amine-catalysed reaction between OH -and CO 2 to generate bicarbonate correlates with amine pK a . Thermodynamic data from the ab initio computations predicts that the heterocycles PD and PZ and the acyclic sorbent EN are good choices for a capture solvent. AMP and tris perform poorly in comparison.

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“…Amine compounds are used widely in industry as a postcombustion CO 2 capture [7,8], since they exhibit selective absorption of CO 2 from flue gas [9]. Monoethanolamine aqueous solutions effectively capture CO 2 in a 1:2 ratio (monoethanolamine:CO 2 ) at low pressure [10].…”

Section: Introductionmentioning

confidence: 99%

Optimization of selection of chain amine scrubbers for CO2 capture

et al. 2014

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In order to optimize the selection of a suitable amine molecule for CO2 scrubbers, a series of ab initio calculations were performed at the B3LYP/6-31+G(d,p) level of theory. Diethylenetriamine was used as a simple chain amine. Methyl and hydroxyl groups served as examples of electron donors, and electron withdrawing groups like trifluoromethyl and nitro substituents were also evaluated. Interaction distances and binding energies were employed as comparison operators. Moreover, natural bond orbital (NBO) analysis, namely the second order perturbation approach, was applied to determine whether the amine-CO2 interaction is chemical or physical. Different sizes of substituents affect the capture ability of diethylenetriamine. For instance, trifluoromethyl shields the nitrogen atom to which it attaches from the interaction with CO2. The results presented here provide a means of optimizing the choice of amine molecules for developing new amine scrubbers.

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In situ Fourier Transform-Infrared (FT-IR) analysis of carbon dioxide absorption and desorption in amine solutions

Cited by 151 publications

References 4 publications

A Novel Strategy for Carbon Capture and Sequestration by rHLPD Processing

A Novel Strategy for Carbon Capture and Sequestration by rHLPD Processing

Insights into amine-based CO2 capture: an ab initio self-consistent reaction field investigation

Optimization of selection of chain amine scrubbers for CO2 capture

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