Phosphorus Dendrimer Derived Solid Sorbents for CO2 Capture from Post-Combustion Gas Streams

: Lithium aluminate has attracted researchers’ interests due to its wide applications. By combining electronic structural and lattice phonon thermodynamic calculations, the CO2 capture properties of γ-LiAlO2 and α-Li5AlO4 are investigated. Both γ-LiAlO2 and α-Li5AlO4 are insulators with wide band gaps of 4.70 and 4.76 eV respectively. Their 1st valence bands just below the Fermi level are mainly formed by p orbitals of Li, O and Al as well as s orbital of Li. By increasing the temperature from 0 K up to 1500 K, their phonon free energies are decreased while their entropies are increased. Targeting on developing post- and pre-combustion CO2 capture technologies, the obtained results indicated that γ-LiAlO2 is thermodynamically favorable to capture CO2 at lower temperature range (500-800 K) while α-Li5AlO4 could capture CO2 at higher temperature (800-1000 K) range in comparison with other solid sorbents, such as pure Li2O, Li4SiO4 and Li2ZrO3.

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CO2 Capture Using Solid Sorbents

Handbook of Climate Change Mitigation and Adaptation ◽

10.1007/978-3-319-14409-2_83 ◽

2016 ◽

pp. 2349-2404

Author(s):

Yao Shi ◽

Qing Liu ◽

Yi He

Keyword(s):

Co2 Capture ◽

Solid Sorbents

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Pilot test results of post-combustion CO2 capture using solid sorbents

Energy Procedia ◽

10.1016/j.egypro.2011.02.028 ◽

2011 ◽

Vol 4 ◽

pp. 1584-1592 ◽

Cited By ~ 48

Author(s):

Sharon Sjostrom ◽

Holly Krutka ◽

Travis Starns ◽

Tom Campbell

Keyword(s):

Co2 Capture ◽

Pilot Test ◽

Test Results ◽

Solid Sorbents

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Computational Fluid Dynamics Investigation of Cylindrical Filter Element

Volume 3: 25th Computers and Information in Engineering Conference, Parts A and B ◽

10.1115/detc2005-85664 ◽

2005 ◽

Author(s):

M. H. Al-Hajeri ◽

A. Witry

Keyword(s):

Particle Deposition ◽

Velocity Ratio ◽

Cross Flow ◽

Combined Cycle ◽

Filter Element ◽

Cleaning Efficiency ◽

Combustion Gas ◽

Gas Streams ◽

Commercial Code ◽

Face Velocity

Cylindrical or candle filters have been developed for cleaning the hot combustion gas streams upstream of the turbine in a combined cycle power plant. To obtain continues operation a periodic cleaning is necessary and the cleaning efficiency depends on the distribution of the filtration cake. Consequently uniform particle deposition on the filter element surface is desired. The flow around three filter elements in cross flow is investigated computationally using the commercial code FLUENT. Three filter elements are placed in a two-dimensional rectangle duct with fixed face velocity and varying the velocity ratio between the approach and face velocity. Particle trajectories are obtained for a number of particle diameters and different inlet (approach) velocity to face filtration velocity ratios to investigate the behavior of particles around the filter element.

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CO2 Capture by Absorption in Activated Aqueous Solutions of N,N-Diethylethanoloamine

Ecological Chemistry and Engineering S ◽

10.1515/eces-2017-0016 ◽

2017 ◽

Vol 24 (2) ◽

pp. 239-248 ◽

Cited By ~ 1

Author(s):

Ewelina Kruszczak ◽

Hanna Kierzkowska-Pawlak

Keyword(s):

Aqueous Solution ◽

Aqueous Solutions ◽

Co2 Capture ◽

Tertiary Amine ◽

Absorption Rate ◽

Absorption Process ◽

Promising Technique ◽

Gas Streams ◽

Hindered Amines ◽

Amine Solutions

Abstract The CO2 absorption process using aqueous amine solutions has been the most promising technique used for the removal of CO2 from gas streams in energy sector. In recent years, many researchers tested solutions which are composed of several compounds: a slow reacting tertiary amine- and a fast amine acting as an activator. In this paper, the CO2 absorption rate in an aqueous solution of N,N-diethylethanoloamine (DEEA) and activated solutions DEEA is investigated experimentally. The activators considered are sterically hindered amines: 2-amino-2-methyl-1-propanol (AMP), 2-amino-2-methyl-1,3-propanediol (AMPD) and N-methyl-1,3-propanediamine (MAPA) from the group of polyamines. The experiments were conducted over the temperature range of 303-333 K and the total amine concentration of 2 M. From the CO2 absorption experiments into mixed aqueous solutions of DEEA and MAPA, it was found that the addition of small amounts of MAPA into aqueous DEEA solutions has a significant effect on the enhancement of the CO2 absorption rate. The application of hindered amines: AMP or AMP as activators resulted in a marginally improvement of the absorption rate of CO2.

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