Carbon dioxide absorption into biphasic amine solvent with solvent loss reduction

Zhang, Jiafei; Nwani, O.; Tan, Yudy Halim; Agar, David W.

doi:10.1016/j.cherd.2011.02.005

Cited by 65 publications

(25 citation statements)

References 16 publications

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“…Water forms a CO 2 -lean phase while lipophilic amines a CO 2 -rich phase. The CO 2 loading capacity of water is marginal under practical capture operating conditions (it depends on pH and pressure) while for lipophilic amines it is approximately 1 kmol CO 2 /kmol lipophilic amine) [27]. These liquids are immiscible and CO 2 concentrates in lipophilic amines which only need separation and regeneration.…”

Section: Practical Examplesmentioning

confidence: 99%

Useful Mechanisms, Energy Efficiency Benefits, and Challenges of Emerging Innovative Advanced Solvent Based Capture Processes

Budzianowski¹

2016

Green Energy and Technology

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Innovative advanced solvent based capture processes (ASBCPs) employing sophisticated separation mechanisms have emerged as essential solutions that may dramatically reduce high energy requirement of CO 2 separation in capture plants. This study systematically characterises useful mechanisms of several such ASBCPs, being mostly at relatively low technology readiness levels. Based on improved understanding of these emerging ASBCPs it is shown how they can contribute to achieving energy efficiency benefits and thus increase CO 2 capture efficiency. It is followed by an analysis of practical examples of all ASBCPs recently presented in academic and patent literature. Finally, major challenges of discussed emerging ASBCPs are identified showing potential directions for further research and development. Overall, innovative ASBCPs employ very different mechanisms translating to different energy efficiency benefits in various CO 2 capture applications. The provided technological account along with the identified challenges may be useful for capture process developers which will be able to bring the most promising ASBCPs to higher technology readiness levels and finally they can be employed in the practice. Nomenclature 5OCB4,4′-pentyloxy cyanobiphenyl 7OCB 4,4′-heptyloxy cyanobiphenyl AA Aqueous ammonia AAS Amino acid salt ASBCP Advanced solvent based capture process BDA 1,4-butanediamine BTCA Benzotriazole-5-carboxylic acid

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Section: Practical Examplesmentioning

confidence: 99%

Useful Mechanisms, Energy Efficiency Benefits, and Challenges of Emerging Innovative Advanced Solvent Based Capture Processes

Budzianowski¹

2016

Green Energy and Technology

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“…The major advantage of using lipophilic amines with a reaction involving thermomorphic transition to the multiphase system is that the regeneration can be carried out at a modest temperature of 80°C or lower, which is much less than the temperature employed in industrial processes using alkanolamines, together with the high cyclic loading capacity of such amines, offering more degrees of freedom for cost reduction with respect to the energy requirement. The thermodynamic evaluation technique described by Notz et al [15] demonstrates that the new TBS system can increase the CO 2 capture efficiency by more than 45 % and reduces the energy consumption by more than 30 % in comparison to the absorption and regeneration characteristics of the benchmark aqueous absorbent MEA (4 GJ t CO 2 -1 ) [13].…”

Section: Performance Of Tbs Absorbentsmentioning

confidence: 99%

“…The total amine concentration was determined by acid-base back-titration and the blended amine compositions were determined by GC analysis (CP-Volamine capillary column 60.0 m × 320 lm, at oven temperatures of 60-260°C, with a TCD detector at 250°C). The detailed experimental setup is found in a previous publication [13].…”

Section: Co 2 Absorption Into Lipophilic Aminesmentioning

confidence: 99%

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Novel Thermomorphic Biphasic Amine Solvents for CO2 Absorption and Low-Temperature Extractive Regeneration

Zhang

Misch

Tan

et al. 2011

Chem. Eng. Technol.

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The key challenge in amine-based CO 2 capture from flue gases is to reduce the energy consumption required for solvent regeneration. Lipophilic amines exhibit a thermomorphic phase transition upon heating, giving rise to autoextractive behavior, which intensifies desorption at temperatures well below the boiling point of aqueous solutions. The low regeneration temperature of less than 80°C together with the high cyclic CO 2 loading capacity of ∼0.9 mol CO 2 mol absorbent -1 of such thermomorphic biphasic solvent (TBS) systems permit the use of low-value and even waste heat at temperatures below 100°C for desorption. In order to reduce the exergy demands still further, techniques for enhancing CO 2 release using extractive regeneration with inert solvent addition were investigated at temperatures of 40-50°C to permit the use of waste heat at temperatures of ∼70°C or less. The regeneration of 3 M absorbed lipophilic amine solutions with 0.93 mol mol -1 CO 2 loading by using various additional solvents and the evaluation of the extractive performance in multiple-stage crosscurrent and countercurrent configurations indicated the promise of adding certain hydrophobic solvents to enhance the low-temperature regeneration of TBS absorbents.

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“…In the anodic chamber was placed a solution of alkene (0.20 mmol), PEG 2000 (2.0 g, 1.0 mmol), Pd(OAc) 2 3.0 F/ mol) at 60°C with magnetic stirring. After the electrolysis, the resulting mixture in the anodic chamber was extracted with hexane (3 © 10 mL).…”

Section: Methodsmentioning

confidence: 99%

Recyclable Palladium Catalyst in PEG/CH3CN Biphasic System for Electro-oxidative Wacker-type Reaction

et al. 2013

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Carbon dioxide absorption into biphasic amine solvent with solvent loss reduction

Cited by 65 publications

References 16 publications

Useful Mechanisms, Energy Efficiency Benefits, and Challenges of Emerging Innovative Advanced Solvent Based Capture Processes

Useful Mechanisms, Energy Efficiency Benefits, and Challenges of Emerging Innovative Advanced Solvent Based Capture Processes

Novel Thermomorphic Biphasic Amine Solvents for CO2 Absorption and Low-Temperature Extractive Regeneration

Recyclable Palladium Catalyst in PEG/CH3CN Biphasic System for Electro-oxidative Wacker-type Reaction

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