Linear Relationships for Modeling CO2 Absorption in Aqueous Alkanolamine Solutions in a Thermodynamically Consistent Way

A thermodynamically consistent model for the carbon dioxide (CO2) absorption in aqueous alkanolamine system is of great importance in the research and development of a CO2 capture process. To facilitate the development of thermodynamic models, linear Gibbs free energy, enthalpy, and heat capacity relationships using well-known amines as reference are used to correlate the standard reference state properties of ionic species with those of molecular species in the electrolyte system, which has been approved to provide a reliable and consistent way to estimate required parameters when there is minimal or no appropriate experimental data available. The proposed relationships have been applied to the development of an electrolyte Non-Random Two Liquid (NRTL) activity coefficient model for CO2 absorption in aqueous 1-amino-2-propanol (A2P) solution, as an example to demonstration the methodology. With limited vapor-liquid equilibrium data and other thermodynamic properties, the parameters in the electrolyte NRTL model are identified with good accuracy.

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The Effect of Chemical Structure of Newly Synthesized Tertiary Amines Used for the Post Combustion Capture Process on Carbon dioxide (CO2): Kinetics of CO2 Absorption Using the Stopped-Flow Apparatus and Regeneration, and Heat Input of CO2 Regeneration

Energy Procedia ◽

10.1016/j.egypro.2017.03.1227 ◽

2017 ◽

Vol 114 ◽

pp. 852-859 ◽

Cited By ~ 4

Author(s):

Sudkanueng Singto ◽

Teeradet Supap ◽

Raphael Idem ◽

Paitoon Tontiwachwuthikul ◽

Supawan Tantayanon

Keyword(s):

Carbon Dioxide ◽

Heat Input ◽

Chemical Structure ◽

Stopped Flow ◽

Co2 Absorption ◽

Tertiary Amines ◽

Capture Process ◽

Flow Apparatus ◽

Carbon Dioxide Co2 ◽

Kinetics Of

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Effects of the Water Content of Soda Lime on Compound A Concentration in the Anesthesia Circuit in Sevoflurane Anesthesia

Anesthesiology ◽

10.1097/00000542-199801000-00012 ◽

1998 ◽

Vol 88 (1) ◽

pp. 66-71 ◽

Cited By ~ 15

Author(s):

Hiromichi Bito ◽

Yukako Ikeuchi ◽

Kazuyuki Ikeda

Keyword(s):

Gas Flow ◽

Soda Lime ◽

Absorption Capacity ◽

Low Flow ◽

Co2 Absorption ◽

Sevoflurane Anesthesia ◽

Compound A ◽

Carbon Dioxide Co2 ◽

End Tidal ◽

Co2 Elimination

Background Sevoflurane anesthesia is usually performed with fresh gas flow rates greater than 2 l/min due to the toxicity of compound A in rats and limited clinical experience with sevoflurane in low-flow systems. However, to reduce costs, it would be useful to identify ways to reduce compound A concentrations in low-flow sevoflurane anesthesia. This goal of this study was to determine if compound A concentrations can be reduced by using soda lime with water added. Methods Low-flow sevoflurane anesthesia (fresh gas flow of 1 l/min) was performed in 37 patients using soda lime with water added (perhydrated soda lime) or standard soda lime as the carbon dioxide (CO2) absorbent. The soda lime was not changed between patients, but rather was used until CO2 rebreathing occurred. The perhydrated soda lime was prepared by spraying 100 ml distilled water onto 1 kg fresh soda lime, and water was added only when a new bag of soda lime was placed into the canister. Compound A concentrations in the circle system, soda lime temperatures, inspired and end-tidal CO2 and end-tidal sevoflurane concentrations, and CO2 elimination by the patient were measured during anesthesia. Results Compound A concentrations were significantly lower for the perhydrated soda lime (1.9 +/- 1.8 ppm; means +/- SD) than for the standard soda lime (13.9 +/- 8.2 ppm). No differences were seen between the two types of soda lime with regard to the temperature of the soda lime, end-tidal sevoflurane concentrations, or CO2 elimination. Compound A concentration decreased with the total time of soda lime use for both types of soda lime. The CO2 absorption capacity was significantly less for perhydrated soda lime than for standard soda lime. Conclusions Compound A concentrations in the circuit can be reduced by using soda lime with water added. The CO2 absorption capacity of the soda lime is reduced by adding water to it, but this should not be clinically significant.

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EVALUASI KESETIMBANGAN KELARUTAN GAS KARBON DIOKSIDA (CO2) DALAM PELARUT ALKANOLAMINA MENGGUNAKAN SIMULATOR PROSES

Jurnal Teknik Kimia USU ◽

10.32734/jtk.v4i4.1506 ◽

2015 ◽

Vol 4 (4) ◽

pp. 1-7

Author(s):

Yansen Hartanto ◽

Tri Partono Adhi ◽

Antonius Indarto

Keyword(s):

Natural Gas ◽

Process Simulation ◽

Column Temperature ◽

Basic Module ◽

Acid Gas ◽

Simulation Tools ◽

Gas Removal ◽

Commercial Process ◽

Electrolyte Nrtl ◽

Carbon Dioxide Co2

Acid gas removal to remove carbon dioxide (CO2) in natural gas is one of the most important processes. The common removal process of CO2 from natural gas by using alkanolamine solution This process was adopted as basic module in commercial process simulation tools with various equilibrium models. Thus, this study was focused to evaluate the validity in certain operating condition and equilibrium model that produced by commercial simulation tools. The model in this study included coefficient activity model based on Kent-Eisenberg, Li-Mather, and Electrolyte Non Random Two Liquid (NRTL). The evaluation was conducted by doing analysis from simulation result and experiment data that have been used as reference. Furthermore, validation test in absorption process simulation was done to compare column temperature profile. The overall conclusions show that electrolyte NRTL gives the most accurate result.

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Numerical simulation of carbon dioxide (CO2) absorption and interfacial mass transfer across vertically wavy falling film

Chemical Engineering Science ◽

10.1016/j.ces.2014.05.002 ◽

2014 ◽

Vol 116 ◽

pp. 243-253 ◽

Cited By ~ 18

Author(s):

Jianguang Hu ◽

Xiaogang Yang ◽

Jianguo Yu ◽

Gance Dai

Keyword(s):

Carbon Dioxide ◽

Numerical Simulation ◽

Mass Transfer ◽

Co2 Absorption ◽

Falling Film ◽

Interfacial Mass Transfer ◽

Carbon Dioxide Co2

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A study on CO2 absorption using hybrid solvents in packed columns

International Journal of Low-Carbon Technologies ◽

10.1093/ijlct/ctz051 ◽

2019 ◽

Cited By ~ 1

Author(s):

Ravinder Kumar ◽

Mohammad Hossein Ahmadi ◽

Dipen Kumar Rajak ◽

Mohammad Alhuyi Nazari

Keyword(s):

Carbon Dioxide ◽

Co2 Capture ◽

Power Plants ◽

Large Scale ◽

Carbon Dioxide Capture ◽

Packed Column ◽

Absorption Efficiency ◽

Co2 Absorption ◽

Process Industries ◽

Carbon Dioxide Co2

Abstract Greenhouse gases emissions from large scale industries as well as gasoline based vehicles are mainly responsible for global warming since the 1980s. At present, it has triggered global efforts to reduce the level of GHG. The contribution of carbon dioxide (CO2) in polluting the environment is at a peak due to the excessive use of coal in power plants. So, serious attention is required to reduce the level of CO2 using advanced technologies. Carbon dioxide capture and storage may play an important role in this direction. In process industries, various carbon dioxide capture techniques can be used to reduce CO2 emissions. However, post-combustion carbon dioxide capture is on top priority. Nowadays the researcher is focusing their work on CO2 capture using hybrid solvent. This work highlights a review of carbon dioxide capture using various kind of hybrid solvent in a packed column. The various challenges for absorption efficiency enhancement and future direction are also discussed in the present work. It is concluded through the literature survey that hybrid solvent shows better efficiency in comparison to the aqueous solution used for CO2 capture.

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Determining the carbon footprint for a new earthen-based finish

International Journal of Low-Carbon Technologies ◽

10.1093/ijlct/ctz045 ◽

2019 ◽

Vol 15 (1) ◽

pp. 143-148 ◽

Cited By ~ 1

Author(s):

Yolanda G Aranda-Jimenez ◽

Edgardo J Suarez-Dominguez

Keyword(s):

Carbon Dioxide ◽

Carbon Footprint ◽

Organic Materials ◽

Architecture Design ◽

Co2 Absorption ◽

A Value ◽

Co2 Equivalent ◽

Carbon Dioxide Co2

Abstract In the present work the carbon footprint for a material developed in the Faculty of Architecture, Design and Urbanism of the Autonomous University of Tamaulipas (UAT) constituted by argillaceous earth, aloe juice and fiber of ixtle with utility like the inner coating of walls in buildings was determined. The objective of this paper is the calculation of the contribution of carbon dioxide (CO2) by the plant, considering the stoichiometry of CO2 absorption accompanied by the determination at the laboratory level. It was found that the use of organic materials in mortar mixtures, when they are produced manually by the person who will use them, and that is common in cases of self-construction, can generate approximately −0.45 kg of CO2 equivalent for each kilogram of plant produced for the preparation of mixtures. In addition, the equivalent CO2 was calculated for the elaboration of a cubic meter of useful mixture as a wall covering obtaining a value below the equivalent 14 kg of CO2.

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Comparative kinetics of carbon dioxide (CO2) absorption into EAE, 1DMA2P and their blends in aqueous solution using the stopped-flow technique

International Journal of Greenhouse Gas Control ◽

10.1016/j.ijggc.2019.102948 ◽

2020 ◽

Vol 94 ◽

pp. 102948 ◽

Cited By ~ 10

Author(s):

Hongxia Gao ◽

Nan Wang ◽

Jigang Du ◽

Xiao Luo ◽

Zhiwu Liang

Keyword(s):

Carbon Dioxide ◽

Aqueous Solution ◽

Stopped Flow ◽

Co2 Absorption ◽

Carbon Dioxide Co2 ◽

Kinetics Of

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Experimental study of CO2 solubility in high concentration MEA solution for intensified solvent-based carbon capture

MATEC Web of Conferences ◽

10.1051/matecconf/201927201004 ◽

2019 ◽

Vol 272 ◽

pp. 01004 ◽

Cited By ~ 1

Author(s):

Eni Oko ◽

Toluleke E. Akinola ◽

Chin-Hung Cheng ◽

Meihong Wang ◽

Jian Chen ◽

...

Keyword(s):

Carbon Capture ◽

Process Intensification ◽

Solubility Data ◽

High Concentration ◽

Co2 Solubility ◽

Capture Process ◽

Process Economics ◽

Extended Uniquac ◽

Electrolyte Nrtl ◽

Capture Techniques

The solvent-based carbon capture process is the most matured and economical route for decarbonizing the power sector. In this process, aqueous monoethanolamine (MEA) is commonly used as the solvent for CO2 scrubbing from power plant and industrial flue gases. Generally, aqueous MEA with 30 wt% (or less) concentration is considered the benchmark solvent. The CO2 solubility data in aqueous MEA solution, used for modelling of the vapour-liquid equilibria (VLE) of CO2 in MEA solutions, are widely published for 30 wt% (or less) concentration. Aqueous MEA with higher concentrations (from 40 to 100 wt%) is considered in solvent-based carbon capture designs with techniques involving process intensification (PI). PI techniques could improve the process economics and operability of solvent-based carbon capture. Developing PI for application in capture process requires CO2 solubility data for concentrated MEA solutions. These data are however limited in literature. The modelling of the vapour-liquid equilibria (VLE) of CO2 in MEA solutions for PI-based solvent capture techniques involving stronger MEA solution of about 80 wt% concentration requires solubility data at the concentration. In this study, the data for 80 wt% MEA is presented for 40,60, 100 and 120oC. The experimental technique and analytical procedure in this study were validated by comparing the measurements for 30 wt% MEA with data from the literature. The data from this study can be fitted to VLE models such as electrolyte NRTL, extended UNIQUAC etc. which is an important component of solvent-based capture model using MEA as the solvent. More accurate VLE models will improve the prediction accuracy of capture level, rich loading etc. using PI-based solvent-based capture model.

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