Initial CO2 Pressure Research Articles

Early Nitrogen Budget of the Martian Atmosphere and Its Evolution

AbstractIn 1976, Viking measured a 14N/15N ratio of 170 ± 15 in the Martian atmosphere, and in 2012, MSL measured a ratio of 173 ± 11. This type of enrichment of the heavier isotope can only be explained by a significant loss of N to space, with the lighter isotope escaping more efficiently. A quantitative understanding of this nitrogen evolution of the Martian atmosphere requires analyzing all of the sources, sinks and exchanges of N2. We employ the processes of sputtering, photochemical escape by dissociative recombination and photodissociation, volcanic outgassing and impact processes to understand the evolution of N2 through time. We use a forward time‐marching model starting at initial abundance at 4 Gya to calculate the N2 abundance and 15N/14N enrichment over the history of Mars. We also incorporate a simultaneous CO2 evolution, which decays in either a power‐law or linear function to the present‐day value of 6 mbar. We constrain the simulated evolutionary tracks to the present day N2 abundance and 15N/14N ratio of the Martian atmosphere to explore the initial conditions of the early atmosphere. Our model indicates a modal value of 120 mbar of initial N2 pressure, with an upper limit of 3.6 bars, for an initial CO2 pressure of 1 bar. This modal value is in good agreement with the N2 budget of Earth's atmosphere when scaled to the mass of Mars, which amounts to ∼110 mbar.

Microwave-assisted halogen-bond catalyzed CO2 conversion to cyclic carbonates

The drive to efficiently convert carbon dioxide to added-value products is a major topic in modern science with one of the utmost relevance, whether in the context of reducing the net amount of CO2 in the atmosphere with it being a greenhouse gas or to make use of it as the world’s largest C1 carbon stock. Recently, first examples have been published using halogen-bond donors as co-catalysts in the conversion of epoxides to cyclic carbonates. However, due to the use high pressure conditions and bifunctional catalysts containing both, nucleophilic halides and halogen bond (XB) donor, it is difficult to estimate the sole contribution of the latter. Herein, we have applied various XB donors as co-catalyst under initial atmospheric CO2 pressure to more accurately determine the impact of non-covalent halogen bonding on the catalytic activity. Furthermore, the reproducibility of the reaction was significantly improved by implementing microwave-assisted heating.

In vitro evaluation of the performance of an oxygenator depending on the non-standard gas content of the inlet blood with special regard on CO2 elimination.

The performance of an oxygenator, as found in literature, is evaluated according to protocols that define standard values of the gas content in the inlet blood. However, when dealing with simulations of lung insufficiency, a more extensive evaluation is needed. This work aims to investigate and assess the gas exchange performance of an oxygenator for different input values of gas content in blood. Three commercially available oxygenators with different membrane surfaces were investigated in a mock loop for three blood flow rates (0.5l/min, 1l/min, and 5l/min) and two gas-to-blood ratios (1:1, and 15:1). The initial CO2 and O2 partial pressures (pCO2 and pO2) in blood were set to≥100mmHg and ≤10mmHg, respectively. For each ratio, the efficiency, defined as the ratio between the difference of pressure inlet and outlet and the inlet pCO2 (pCO2(i)), was calculated. The CO2 elimination in an oxygenator was higher for higher pCO2(i). While for a pCO2(i) of 100mmHg, an oxygenator eliminated 80mmHg, the same oxygenator at the same conditions eliminated 5mmHg CO2 when pCO2(i) was 10mmHg. The efficiency of the oxygenator decreased from 76,9% to 49,5%. For simulation reasons, the relation between the pCO2(i) and outlet (pCO2(o)) for each oxygenator at different blood and gas flows, was described as an exponential formula. The performance of an oxygenator in terms of CO2 elimination depends not only on the blood and gas flow, but also on the initial pCO2 value. This dependence is crucial for simulation studies in the future.

Green degradation of Caragana korshinskii to valuable bio-oils in supercritical CO2-ethanol: Evaluation of CH and O moieties

An eco-friendly supercritical CO2 (scCO2)-ethanolysis system was designed to convert Caragana korshinskii (Ck) into valuable bio-oils. Hydrocarbons and O-containing moieties (CH and O classes) in derived soluble portions (SPs) were evaluated in detail. The results show that scCO2-ethanol has synergistic degradation ability and strong permeability to complex structures. Optimal conditions were determined to be 10 mL g−1 ethanol/Ck ratio, 1 MPa initial CO2 pressure, 300 °C, and 60 min holding time based on the SP yield and the maximum yield is 38.2 wt% with high heating value of 24.06 kJ g−1. The difference of SPs between conventional ethanolysis (SPE) and scCO2-ethanolysis (SPSE) was compared. According to FTIR and GC/MS analyses, the distribution of functional groups and detectable group components is similar, and O-containing species are dominant. Tetrahydrofurans & furans, alkoxy-substituted benzenes & alkoxy-substituted phenols, and ketones & esters are main group components. The characteristic differences of >C-O- and >CO classes are related to the following three aspects: (1) the ring-opening, >C-O- bond cleavage, cyclization, and condensation of cellulose/hemicellulose, (2) the destruction of abundant >Car-O- in lignin, especially guaiacyl and syringyl units, and (3) the formation of ethyl esters promoted by the nucleophilic attack of ethoxy group. Orbitrap MS analysis further confirmed that O-containing species of SPE and SPSE are mainly concentrated in O1-O4 classes, and scCO2-ethanolysis promotes the acquisition of sugars and bioactive fragments from Ck. In addition, the characteristic distribution of On classes in SPSE is related to the release of natural oxygenates, cleavage of weak/intermediate-strength covalent bonds, and dissociation of O-containing macromolecules. This study provides a reference perspective and a potential implementation approach for the clean and efficient utilization of Ck to produce valuable bio-oils.

Pillaring of bentonite clay with Zr, Ti, and Ti/Zr by ultrasonic technique for biodiesel production

The current study concentrated on employing metal pillared bentonite catalysts to transform waste cooking oil. The goal of this research was to create pillared bentonite catalyst for effective low temperature conversion. The ultrasonic technique was used to prepare pillared bentonite with varied polycations (Zr, Ti, and mixed Ti/Zr) and varied sonication time (10, 30, 50 min) as catalysts for biodiesel production. The characterization of pillared bentonite (Zr-pillared interlayered clay (PILC), Ti-pillared interlayered clay (PILC), Ti/Zr-pillared interlayered clay (PILC)) and calcium bentonite (Ca-B) was conducted by NH3-TPD, XRF, BET, X-ray diffractometer (XRD), FTIR, and RAMAN analysis. The pillared bentonite as catalyst had powder and pore structure with high surface area, acidity, and excellent performance. The pillared bentonite catalysts increased in specific surface area of two to seven times, and the basal spacing expanded. In comparison to Ca-B, their morphology surfaces significantly changed, resulting in smaller pore size and greater total acidity values. Ti-PiLC and Ti/ZrPiLC catalysts were sonicated for 10 min, whereas Zr-PILC was sonicated for 30 min and produced the highest surface area results when compared to the other variations. The acidity of the Ti/Zr-PILC catalyst is 949–1117 µmol/g, and its surface area is 158–169 m2/g. According to the catalytic test, the total conversion formed for 6-hour reaction at 100 °C, and 60 bar of initial CO2 pressure was 78.43%.

Aluminosilicate-Supported Catalysts for the Synthesis of Cyclic Carbonates by Reaction of CO2 with the Corresponding Epoxides.

Functionalized aluminosilicate materials were studied as catalysts for the conversion of different cyclic carbonates to the corresponding epoxides by the addition of CO2. Aluminum was incorporated in the mesostructured SBA-15 silica network. Thereafter, functionalization with imidazolium chloride or magnesium oxide was performed on the Al_SBA-15 supports. The isomorphic substitution of Si with Al and the resulting acidity of the supports were investigated via 27Al magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy and NH3 adsorption microcalorimetry. The Al content and the amount of MgO were quantified via inductively coupled plasma optical emission spectroscopy (ICP-OES) analysis. The anchoring of the imidazolium salt was assessed by 29Si and 13C MAS NMR spectroscopy and quantified by combustion chemical analysis. Textural and structural properties of supports and catalysts were studied by N2 physisorption and X-ray diffraction (XRD). The functionalized systems were then tested as catalysts for the conversion of CO2 and epoxides to cyclic carbonates in a batch reactor at 100 or 125 °C, with an initial CO2 pressure (at room temperature) of 25 bar. Whereas the activity of the MgO/xAl_SBA-15 systems was moderate for the conversion of glycidol to the corresponding cyclic carbonate, the Al_SBA-15-supported imidazolium chloride catalysts gave excellent results over different epoxides (conversion of glycidol, epichlorohydrin, and styrene oxide up to 89%, 78%, and 18%, respectively). Reusability tests were also performed. Even when some deactivation from one run to the other was observed, a comparison with the literature showed the Al-containing imidazolium systems to be promising catalysts. The fully heterogeneous nature of the present catalysts, where the inorganic support on which the imidazolium species are immobilized also contains the Lewis acid sites, gives them a further advantage with respect to most of the catalytic systems reported in the literature so far.

Study on the sequestration capacity of fly ash on CO2 and employing the product to prevent spontaneous combustion of coal

An innovative approach of utilizing fly ash waste to sequester CO2 and employ the carbonated slurry to prevent spontaneous combustion of coal (SCC) in mining areas is proposed. This paper examines the CO2 sequestration capacity of fly ash based on novel calculation methods, and the functions of carbonated fly ash (CFA) slurry on the microstructure of coal and the inhibitory properties of SCC is investigated. Kinetic experiments demonstrate that the quantity of CO2 sequestration and the initial rate of CO2 sequestration increment generally with the initial CO2 pressure and the water-to-solid ratio. CO2 sequestration of the fly ash (Class F) amounts to 54.9 g/kg and the initial rate of CO2 sequestration gained 0.035 mol/kg/s at an initial CO2 pressure of 20 bar and a water-to-solid ratio of 6. The specific surface area and pore volume of the coal treated by the filtrate of CFA slurry were diminished. When the water-to-solid ratio of the slurry is 6 and the slurry-to-coal ratio reaches 3: 1, the crossing point temperature increments by 13.8 ℃ compared with the origin coal. The risk of SCC greatly diminishes based on the evaluating index I of the propensity of SCC, and CFA slurry demonstrates a great suppression function on SCC. The approach proposed in this paper effectively actualizes the combination of CO2 sequestration, utilization of solid waste, and prevention of SCC.

Three-component 1,1,3,3-tetramethylguanidine based CO2-binding organic liquids: Statistical solvent design and thermodynamic modeling of CO2 solubility by LJ-Global TPT2 EoS

In this study, three-component CO2-binding organic liquids (CO2BOLs) are introduced for high pressure CO2 absorption. The non-aqueous, green solvents consist of a superbase (1,1,3,3-tetramethylguanidine (TMG)), a tertiary alkanolamine (Dimethylethanolamine (DMEA), Diethylethanolamine (DEEA) and N-methyldiethanolamine (MDEA)) and an alcohol (MeOH, n-BuOH, sec‑BuOH, tert‑BuOH and 1-HexOH). The best combination of solvent components was determined to be the TMG/DMEA/n-BuOH BOL (molar ration:1/1/1) based on both CO2 loading (αeq= 0.431 mol CO2/mol solvent) and absorption rate (αR= 0.225 mol CO2/mol solvent within 20 min) by implementing screening experiments. The mixture design approach was applied for the design of experiments, modeling and investigating the effect of components’ proportion on αeq and αR at the constant temperature of 35.0 °C and initial CO2 pressure of 25.0 bar. The highest αeq (0.573 mol CO2/mol BOL) and αR (0.362 mol CO2/mol solvent) were obtained using TMG/n-butanol (1/1) and DMEA BOLs, respectively. The CO2 solubility data in the two-component BOLs: TMG/n-BuOH, TMG/DMEA and DMEA/n-BuOH as well as the three-component TMG/DMEA/n-BuOH BOL were gathered at 25.0, 35.0 and 45.0 °C and the pressures up to 35.0 bar using equimolar solvent mixtures. The LJ-Global TPT2 EoS was used in the simultaneous VLE and chemical equilibrium calculation algorithm for the thermodynamic modeling of CO2 solubility in the BOLs. The AAD% in the modeling of TMG/n-BuOH, TMG/DMEA, DMEA/n-BuOH and TMG/DMEA/n-BuOH BOLs were calculated to be 11.5%, 12.4%, 10.5 and 12.9%, respectively. The enthalpies of CO2 absorption in BOLs and the speciation of the system components were predicted from reaction equilibrium constants and using LJ-Global TPT2 EoS.

Synthesis of highly effective [Emim]IM applied in one-step CO2 conversion to dimethyl carbonate

Ionic liquid 1-ethyl-3-methylimidazolium ([Emim]IM) with high thermal stability and strong basicity was successfully synthesized. Using [Emim]IM as catalyst, dimethyl carbonate (DMC) was directly synthesized from epoxy propane (PO), CO2, and methanol under mild reaction conditions. A continuous two-stage DMC synthesis process was developed. The cycloaddition of CO2 and PO was first conducted to produce propylene carbonate (PC), and then methanol was introduced into the system to synthesize DMC. During the cycloaddition process, 97.40% PO conversion and 97.40% PC yield were achieved with TON of 99.49. In the subsequent transesterification stage, DMC yield attained 83.63% with selectivity higher than 99% and TON of 70.15. [Emim]IM was reused for seven times without obvious deactivation, exhibiting good stability. The effects of reaction temperature, reaction time, the initial pressure of CO2, and catalyst weight on cycloaddition and transesterification reactions were systematically investigated. The kinetic study showed that the activation energies (Ea) of cycloaddition and transesterification reactions were 28.02 and 38.53 KJ·mol−1, respectively, much lower than those of catalysts reported in the literatures. In addition, [Emim]IM displayed superior catalytic activity for the cycloaddition of CO2 with various epoxy compounds.

Investigation of synthesis parameters to fabricate CeO2 with a large surface and high oxygen vacancies for dramatically enhanced performance of direct DMC synthesis from CO2 and methanol

Hierarchically porous CeO2 with excellent catalytic performance for direct dimethyl carbonate (DMC) from CO2 and methanol was successfully prepared by a simple hydrothermal method due to the abundant oxygen vacancies (Ovs, ∼17%) and large surface area (137 m2·g−1). The effects of template dosage as well as synthesis parameters including hydrothermal time and calcination temperature on the physicochemical properties of as-synthesized CeO2 were studied, and the reaction conditions were investigated and optimized. The obtained results indicated that the Ovs varied with prolonging hydrothermal time and more Ovs were formed by etching due to longer crystal time. And the fabricated Ovs acting as acid sites and basic sites effectively activated CO2 and methanol, respectively, which was further confirmed by the simulation results, however, the strong acid sites are detrimental to catalyst stability due to their strong chemical interactions with nicotinamide. And a high DMC yield of 260.12 mmol∙g−1 was obtained under the optimal reaction conditions: reaction time 5 h, initial CO2 pressure 4.0 MPa, and reaction temperature 140 °C.

Unity Makes Strength: Constructing Polymeric Catalyst for Selective Synthesis of CO 2 /Epoxide Copolymer

Unity Makes Strength: Constructing Polymeric Catalyst for Selective Synthesis of CO ₂ /Epoxide Copolymer

Synthesis of diethyl carbonate from CO2 and orthoester promoted by a CeO2 catalyst and ethanol

The combination of a CeO2 catalyst and ethanol effectively promotes the direct synthesis of diethyl carbonate (DEC) from CO2 and an orthoester. The reaction temperature, initial CO2 pressure, and the ethanol/orthoester volume ratio were found to significantly influence DEC formation and were systematically studied to determine the optimum conditions. DEC amount of 5.2 mmol was obtained at 160 °C, 5 MPa of CO2, and a reaction time of 20 h, providing high productivity (1.21 mmolDEC mmolcatalyst−1 h−1) using a CeO2 catalyst. The recovered CeO2 catalyst was recyclable at least four times without any significant loss of activity when both triethyl orthoacetate and triethyl orthovalerate were used. A series of orthoesters bearing various alkyl substituents, aromatic substituents and halide moieties were evaluated for their activities with and without ethanol. In the presence of ethanol, orthoesters bearing longer alkyl substituents led to higher DEC yields, and orthoesters bearing aromatic and halide moieties negatively impacted DEC formation. In the absence of ethanol, triethyl orthoacetate provided the highest DEC yield; in all cases, the use of ethanol resulted in a greater DEC formation than when the reaction was performed without ethanol.

Chromium-Salophen as a Soluble or Silica-Supported Co-Catalyst for the Fixation of CO2 Onto Styrene Oxide at Low Temperatures.

Addition of a soluble or a supported CrIII-salophen complex as a co-catalyst greatly enhances the catalytic activity of Bu4NBr for the formation of styrene carbonate from styrene epoxide and CO2. Their combination with a very low co-catalyst:Bu4NBr:styrene oxide molar ratio = 1:2:112 (corresponding to 0.9 mol% of CrIII co-catalyst) led to an almost complete conversion of styrene oxide after 7 h at 80°C under an initial pressure of CO2 of 11 bar and to a selectivity in styrene carbonate of 100%. The covalent heterogenization of the complex was achieved through the formation of an amide bond with a functionalized {NH2}-SBA-15 silica support. In both conditions, the use of these CrIII catalysts allowed excellent conversion of styrene already at 50°C (69 and 47% after 24 h, respectively, in homogeneous and heterogeneous conditions). Comparison with our previous work using other metal cations from the transition metals particularly highlights the preponderant effect of the nature of the metal cation as a co-catalyst in this reaction, that may be linked to its calculated binding energy to the epoxides. Both co-catalysts were successfully reused four times without any appreciable loss of performance.

Treatment of ladle furnace slag by carbonation: Carbon dioxide sequestration, heavy metal immobilization, and strength enhancement

Ladle furnace slag (LFS) is a by-product of the steel industry and is difficult to be reused due to its weak cementitious property, low strength, and potential leaching of heavy metals. The emission of carbon dioxide (CO2) is also a concern for the steel industry. Therefore, the aim of this study was to use CO2 to immobilize heavy metals in LFS and enhance its strength. The LFS specimens were carbonated with different initial water contents, CO2 pressures, and carbonation periods. The carbonated LFS were then studied by leaching test, unconfined compressive strength (UCS), X-ray diffraction (XRD), thermogravimetric analysis (TGA), fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM) with energy dispersive X-ray spectroscopy (EDX). The results showed that LFS had carbonation reactivity and could sequester CO2 up to 9.6% of its own mass. The carbonation also effectively reduced the leaching of heavy metals from LFS, especially Pb and Zn. The concentrations of leached Pb and Zn of carbonated LFS were significantly reduced from 2760 and 1460 μg/L to 0.11 and 0.56 μg/L, respectively, being one order of magnitude (Pb) or three orders of magnitude (Zn) lower than limits of inert waste and three drinking water regulations. The strength of the carbonated LFS also remarkably increased and was two orders of magnitude higher than that of the uncarbonated LFS. Following the carbonation, calcium carbonate, nesquehonite, and hydromagnesite were produced; these carbonates filled pores and bound LFS particles, which enhanced the strength of LFS.

Prediction of CO2 absorption by nanofluids using artificial neural network modeling

This study focused on providing a model for prediction of CO2 absorption by nanofluids in closed vessel absorber system, for the first time. A 6-input artificial neural network model was presented over 165 extracted experimental data related to CO2 absorption by nanofluids. The used nanofluids were containing spherical nanoparticles of SiO2, Al2O3, Fe3O4 and TiO2 dispersed in water, diethanolamine solution, propylene carbonate and sulfinol as base fluids, respectively. The effective parameters of temperature (T), initial pressure of CO2 (p), time (t), density of nanoparticles (ρnp), average diameter of nanoparticles (dnp) and mass concentration of nanoparticles (φ) were considered as input variables of the network, and the amount of CO2 absorption (α) was chosen as target. The optimal ANN model was obtained in neuron 9. The mean square error (MSE), mean absolute error (MAE), and correlation coefficient (R) were found to be 0.0000236, 0.326 and 0.9996, respectively, for all data. These results showed a good accuracy and performance of developed ANN model in predicting of CO2 absorption.

Kinetic study for ionic liquid catalyzed green O-methylation of cresols using dimethyl carbonate

In this work, we have systematically studied the kinetics and mechanism of ionic liquid catalyzed solvent less liquid-phase O-methylation of p-cresol with dimethyl carbonate (DMC). The effect of various parameters such as mass transfer resistance, catalyst loading, mole ratio, initial CO2 pressure, and temperature was studied. The reaction was found to be pseudo zero order with respect to p-cresol and first order with respect to DMC. o- and m-Cresols were also used. The values of apparent activation energy for o-, m-, and p-cresol are found as 32.5, 34.0, and 32.5 kcal/mol, respectively. Our study also suggests that type of cation and anion affects the catalytic acitivity of ionic liquids. Ionic liquid, tetra butyl phosphonium bromide, offers excellent activity, selectivity, reusability, recyclability and stability.

Hydrothermal carbon dioxide fixation in magnesium hydroxide and serpentine: Effects of temperature and pH

This study investigated hydrothermal fixation of CO2 in serpentine or magnesium hydroxide as one of the compounds containing Mg at an initial CO2 pressure of 7.1 MPa. The carbonation of magnesium hydroxide gave primarily magnesite and the yield increased with increasing initial pH and increasing temperature, reaching 97.9 % at 473 K. Carbonation of serpentine also gave magnesite, and the yield initially increased and then slightly decreased with increasing temperature. Both low and high initial pH enhanced serpentine carbonation at 573 K and the yield of magnesite reached 12.7 % at an initial pH of 1.0. Estimation of chemical species indicated that both the dissolution of serpentine via the action of H+ and the formation of magnesite from MgHCO3+ and Mg2+ via the release of H+ were important reactions. Hydrothermal serpentine carbonation is a promising CO2 fixation method for naturally abundant mineral rocks without expensive additives.

Effects of different amin-based core-shell magnetic NPs on CO2 capture using NMP solution at high pressures

In this work, different modified magnetic nanoparticles (NPs) including Fe3O4–NH2, Fe3O4-proline, Fe3O4-lysine, Fe3O4@SiO2–NH2, Fe3O4@SiO2-proline, and Fe3O4@SiO2-lysine were synthesized to enhance the properties of Fe3O4 NPs in carbon dioxide (CO2) absorption via functionalizing various chemical agents on the surfaces of Fe3O4 NPs. For the investigation of CO2 absorption improvement, the NPs at different weight percents were dispersed in aqueous N-Methyl-2-pyrrolidone (NMP) solution (50 wt%) as a very strong physical absorbent of CO2; and the nano/NMP solutions were in direct contact with CO2 at a high-pressure batch setup. The impressions of different NPs, the initial pressure of CO2 and mass nanoparticle concentration on CO2 absorption were elucidated. The experimental results revealed that Fe3O4, Fe3O4–NH2 and Fe3O4-proline nanofluids were not stable at high concentrations. So, they increased the CO2 absorption rate just up to 7.64%, 15.14% and 15.88% as compared to the base fluid. However, Fe3O4-lysine, Fe3O4@SiO2–NH2, Fe3O4@SiO2-proline and Fe3O4@SiO2-lysine nanofluids by applying chemical agents as a sort of stabilizer and chemical reactant of CO2, improved the equilibrium CO2 absorption up to 19.41%, 23%, 25.53% and 28.49%, respectively.

Absorption of Carbon Dioxide into Aqueous Ammonia Solution using Blended Promoters (MEA, MEA+PZ, PZ+ArgK, MEA+ArgK)

Absorption of CO2 into promoted-NH3 solution utilize a packed column (1.25 m long, 0.05m inside diameter) was examined in the present work. The process performance of four different blended promoters monoethanolamine (MEA)+ piperazine (PZ), piperazine (PZ)+ potassium argininate (ArgK) and monoethanolamine +potassium argininate was compared with unpromoted-NH3 solution by evaluated the absorption rate (φ_(CO_2 )) and overall mass transfer coefficient (K_(G,CO_2.) a_v) over the operating ranges of the studied process variables (1-15Kpa initial partial pressure of CO2, 5-15 Liter/min gas flow rate, 0.25-0.85 Liter/min liquid flow rate). The results exhibit that the absorption behavior and efficiency can be enhanced by rising volumetric liquid flow rate and initial CO2 partial pressure. However, the gas flow rate should be kept at a suitable value on the controlling gas film. Furthermore, it has been observed that the (PZ+ArgK) promoter was the major species that can accelerate the absorption rate and reached almost 66.166% up to123.23% over that of the unpromoted-NH3 solution.

Towards water-insensitive CO2-binding organic liquids for CO2 absorption: Effect of amines as promoter

Abstract CO2-binding organic liquids (CO2-BOLs) or reversible ionic liquids (RILs), are non-aqueous CO2-triggered switchable polarity solvents which can be used for energy efficient CO2 capture. In this study, the novel three-component CO2-BOLs are introduced. They are comprised of 1,8-Diazabicyclo(5.4.0)undec-7-ene (DBU) as an organic superbase and an alkanol in conjunction with an amine as a promoter. Screening experiments were performed to find the best combination of CO2-BOL components based on CO2 loading and absorption rate. The variables were: the type of alcohol (methanol, n-butanol, sec-butanol, tert-butanol and 1-hexanol) and the type of amine (EEA, MEA, AMP, DEA, AEEA, PZ, TETA and DETA) using the DBU superbase. Statistical mixture design approach using Minitab 18 software was implemented for the design of experiments, modeling and optimization of CO2 loading at the fixed temperature of 35 °C and the initial CO2 pressure of 25 bar. It was found that DBU/MeOH/MEA system with the molar ratio of 0.3/0.17/0.53 has the maximum equilibrium absorption (αeq) and CO2 uptake within 30 min (αR) of 0.444 and 0.267 mol CO2/mol solvent, respectively. Amine additives promoted absorption efficiency and inhibited formation of solid precipitates (bicarbonate salt) in the presence of water impurity. Characterization of ionic species and explaining the water-inhibitory effect of MEA were obtained from FTIR, 1H NMR and 13C NMR spectroscopic analysis. Equilibrium CO2 solubility data in DBU/MeOH (1/2) and DBU/MeOH/MEA (0.3/0.6/0.1) CO2-BOLs were also obtained at temperatures of 308.2 and 318.2 K and pressure range of 0–33 bar. The results of present study can be used to effectively utilize CO2-BOLs in the wet conditions with higher absorption efficiency and lower regeneration energy.