1
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Wang E, Luo L, Wang J, Dai J, Li S, Chen L, Li J. A Dataset for Investigations of Amine-Impregnated Solid Adsorbent for Direct Air Capture. Sci Data 2025; 12:724. [PMID: 40312431 PMCID: PMC12046056 DOI: 10.1038/s41597-025-05037-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2024] [Accepted: 04/22/2025] [Indexed: 05/03/2025] Open
Abstract
Amine-impregnated solid adsorbents are widely explored for point source capture and direct air capture (DAC) to address climate change. Existing literature serves as a valuable source for the investigation of amine-functionalized solid adsorbents. This study selected 52 articles from bibliographic platforms using GPT-assisted data source screening. A total of 1,336 data points were manually collected. Each data point is characterized by 28 features including the CO2 capture performance of various adsorbents from diluted to concentrated sources, resulting in 29,857 records. The methodology addresses inconsistencies in units and terminologies in the published articles and demonstrates database reliability, regularity and integrity through statistical analysis. The diverse types of amines and mesoporous solids in the database offer innovation potential for future research. In addition, two machine learning models were trained to promote dataset reuse by scientists from lab-based research and cheminformatics. This study provides opportunities to explore the use of machine learning on small databases and encourages data sharing and uniform reporting among DAC communities.
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Affiliation(s)
- Eryu Wang
- Innovation, Policy and Entrepreneurship Thrust, Society Hub, The Hong Kong University of Science and Technology (Guangzhou), No.1 Duxue Road, Nansha, Guangzhou, 511453, China
| | - Liping Luo
- Data Science and Analytics Thrust, Information Hub, The Hong Kong University of Science and Technology (Guangzhou), No.1 Duxue Road, Nansha, Guangzhou, 511453, China
| | - Jiachuan Wang
- Department of Computer Science and Engineering, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong SAR, 999077, China
| | - Jiaxin Dai
- Innovation, Policy and Entrepreneurship Thrust, Society Hub, The Hong Kong University of Science and Technology (Guangzhou), No.1 Duxue Road, Nansha, Guangzhou, 511453, China
| | - Shuangyin Li
- School of Computer Science, South China Normal University, Guangzhou, China.
| | - Lei Chen
- Data Science and Analytics Thrust, Information Hub, The Hong Kong University of Science and Technology (Guangzhou), No.1 Duxue Road, Nansha, Guangzhou, 511453, China
- Department of Computer Science and Engineering, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong SAR, 999077, China
| | - Jia Li
- School of Interdisciplinary Studies, Lingnan University, Tuen Mun, Hong Kong SAR.
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2
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Narayanan P, Kim SY, Alhazmi D, Jones CW, Lively RP. Self-Supported Branched Poly(ethylenimine) Monoliths from Inverse Template 3D Printing for Direct Air Capture. ACS APPLIED MATERIALS & INTERFACES 2025; 17:10696-10709. [PMID: 39931906 PMCID: PMC11843543 DOI: 10.1021/acsami.4c20617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2024] [Revised: 01/27/2025] [Accepted: 02/01/2025] [Indexed: 02/21/2025]
Abstract
3D-printed inverse templates are combined with ice templating to develop self-supported branched poly(ethylenimine) monoliths with regular channels of varying channel density and ordered macropores. A maximum uptake of 0.96 mmol of CO2/g of monolith from ambient air containing 45.5% RH is achieved from dynamic breakthrough experiments, which is a 31% increase compared to the CO2 uptake from adsorption under dry conditions for the same duration. The breakthrough experiments show characteristics of internal mass-transfer limitations. The cyclic dynamic breakthrough experiments indicate stable operation without significant loss in CO2 uptake across eight cycles. Moreover, the self-supported monolith shows minimal loss in adsorption capacity (7.7%) upon exposure to air containing 21% oxygen at 110 °C, in comparison to a conventional sorbent consisting of poly(ethylenimine) impregnated on Al2O3 (18.9%). The monoliths exhibit good mechanical stability, contributed by elastic deformation, corresponding to up to 74% strain and lower pressure drop compared to many existing monoliths in the literature.
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Affiliation(s)
- Pavithra Narayanan
- School of Chemical and Biomolecular
Engineering, Georgia Institute of Technology,Atlanta, Georgia 30332, United States
| | - Seo-Yul Kim
- School of Chemical and Biomolecular
Engineering, Georgia Institute of Technology,Atlanta, Georgia 30332, United States
| | - Dema Alhazmi
- School of Chemical and Biomolecular
Engineering, Georgia Institute of Technology,Atlanta, Georgia 30332, United States
| | - Christopher W. Jones
- School of Chemical and Biomolecular
Engineering, Georgia Institute of Technology,Atlanta, Georgia 30332, United States
| | - Ryan P. Lively
- School of Chemical and Biomolecular
Engineering, Georgia Institute of Technology,Atlanta, Georgia 30332, United States
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3
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Chen Y, Zhu L, Wu J, Wang K, Ge T. Feasibility and Effectivity of an Amine-Grafted Alumina Adsorbent for Direct Air Capture. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:26166-26178. [PMID: 39604211 DOI: 10.1021/acs.langmuir.4c03673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2024]
Abstract
Direct air capture (DAC) has been identified as a necessary negative emission technology (NET) to solve global warming. DAC methods have been divided into two major types: solvent absorption and sorbent adsorption. Aqueous amine absorption is the major method in postcombustion carbon capture, not in DAC because contactors blow large volumes of air over the solvent, which results in high evaporation of solvents. Solid amine adsorption has been one of the primary methods of DAC due to its low volatility of amine. Therefore, the development of DAC adsorbents is the key to improve CO2 capture efficiency. Nowadays, the research on adsorbents mainly focuses on amine impregnation and grafting. The grafting adsorbents generally have better stability than impregnation adsorbents. Silica is the most common support material for amine-grafted adsorbents. Nonetheless, silica has some defects, such as poor hydrothermal stability, which limits its employment. Alumina is a promising support material with excellent hydrothermal stability, but studies on amine-grafted alumina are still scarce. Herein, a method of 3-[2-(2-aminoethylamino)ethylamino] propyltrimethoxysilane (TRI) grafting onto γ-alumina is presented. The results of this paper suggest that alumina is a potential support material for amine grafting. The CO2 adsorption capacity of the adsorbent is 0.39 mmol g-1 at 400 ppm and 25 °C. The amine-grafted alumina has excellent thermal stability than the amine-impregnation silica adsorbent. Besides, the adsorbent exhibits stable performance during cycles, with the working capacity maintained at 83% of that of the first cycle after 60 cycles. Water adsorption capacity and selectivity indicate that TRI-Al2O3 has good selectivity at high relative humidity. These findings make amine-grafted alumina a promising DAC adsorbent.
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Affiliation(s)
- Yanlin Chen
- Institute of Refrigeration and Cryogenics, Research Center of Solar Power & Refrigeration, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lijun Zhu
- CEEC (Shanghai) System Engineering Co., Ltd., Shanghai 200001, China
| | - Junye Wu
- Institute of Refrigeration and Cryogenics, Research Center of Solar Power & Refrigeration, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Kuihua Wang
- Institute of Refrigeration and Cryogenics, Research Center of Solar Power & Refrigeration, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Tianshu Ge
- Institute of Refrigeration and Cryogenics, Research Center of Solar Power & Refrigeration, Shanghai Jiao Tong University, Shanghai 200240, China
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4
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Stampi-Bombelli V, Mazzotti M. Exploring Geometric Properties and Cycle Design in Packed Bed and Monolith Contactors Using Temperature-Vacuum Swing Adsorption Modeling for Direct Air Capture. Ind Eng Chem Res 2024; 63:19728-19743. [PMID: 39553914 PMCID: PMC11565576 DOI: 10.1021/acs.iecr.4c02303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 10/16/2024] [Accepted: 10/17/2024] [Indexed: 11/19/2024]
Abstract
This study presents a comprehensive comparison between the packed bed and monolith contactor configurations for direct air capture (DAC) via process modeling of a temperature-vacuum swing adsorption (TVSA) process. We investigate various design parameters to optimize performance across different contactor geometries, including pellet size, monolith wall thickness, active sorbent content in monoliths, and packed bed structure configurations, considering both a traditional long column (PB40) and multiple shorter columns configured in parallel (PB5). Our parametric analysis assesses specific exergy consumption, sorbent, and volume requirements across different operating conditions of a five-step TVSA cycle. For minimizing sorbent requirements, PB5 and monoliths with over 80% sorbent loading were the best-performing contactor designs with overlapping performance in the low-exergy region. Beyond this region, PB5 faced limitations in reducing sorbent requirements further and was constrained by a maximum velocity at which it is sensible to operate without substantially increasing the exergy demand. In contrast, monoliths decreased sorbent requirements with minimal exergy increase due to reduced mass transfer resistances and lower pressure drop associated with their thin walls. The analysis of volume requirement-specific exergy Pareto fronts revealed that PB5 was less competitive with this metric due to the requirements for additional void space in the contactor configuration. The study also revealed that optimal sorbent loading for reducing volume requirements in monoliths differed from those minimizing sorbent usage, with the most effective loading being below 100%. Thus, the optimal contactor design varies depending on the goals of minimizing sorbent and volume requirements, and the choice and design of the contactor will depend on the relative costs of these factors. Lastly, our findings challenge the assumption that higher velocities are always preferable for direct air capture, suggesting instead that the operating velocity depends on the contactor configuration.
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Affiliation(s)
| | - Marco Mazzotti
- Institute of Energy and Process
Engineering, ETH Zurich, 8092 Zurich, Switzerland
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5
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Vallace A, Campbell ZS, Moon HJ, Koros WJ, Jones CW, Lively RP. CO 2 Uptake and Stability Enhancement in Vinyltrimethoxysilane-Treated SBA-15 Solid Amine-Based Sorbents. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2401422. [PMID: 39118560 DOI: 10.1002/smll.202401422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 08/01/2024] [Indexed: 08/10/2024]
Abstract
Silica-supported amine absorbents, including materials produced by tethering aminosilanes or infusion of poly(ethyleneimine), represent a promising class of materials for CO2 capture applications, including direct air and point source capture. Various silica surface treatments and functionalization strategies are explored to enhance stability and CO2 uptake in amine-based solid sorbent systems. Here, the synthesis and characterization of novel vinyltrimethoxysilane-treated Santa Barbara Amorphous-15 (SBA-15) supports and the corresponding enhancement in CO2 uptake compared to various SBA-15-based control supports are presented. The relationship between CO2 diffusion and amine efficiency in these systems is explored using a previously reported kinetic model. The synthesized materials are characterized with CO2 and H2O isotherms, diffuse reflectance infrared Fourier transform spectroscopy, 1H T1-T2 relaxation correlation NMR, and rapid thermal cycling experiments. The novel support materials are shown to enable high amine efficiencies, approaching a fourfold improvement over standard SBA-15-supported amines, while simultaneously exhibiting excellent stability when cycled rapidly under humid conditions. As the poly(ethyleneimine) loadings are held constant across the various samples, enhancements in CO2 uptake are attributed to differences in the way the poly(ethyleneimine) interacts with the support surface.
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Affiliation(s)
- Anthony Vallace
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA, 30332, USA
| | - Zachary S Campbell
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA, 30332, USA
| | - Hyun June Moon
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA, 30332, USA
| | - William J Koros
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA, 30332, USA
| | - Christopher W Jones
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA, 30332, USA
| | - Ryan P Lively
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA, 30332, USA
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6
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Cai X, Coletti MA, Sholl DS, Allen-Dumas MR. Assessing Impacts of Atmospheric Conditions on Efficiency and Siting of Large-Scale Direct Air Capture Facilities. JACS AU 2024; 4:1883-1891. [PMID: 38818082 PMCID: PMC11134380 DOI: 10.1021/jacsau.4c00082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 04/02/2024] [Accepted: 04/15/2024] [Indexed: 06/01/2024]
Abstract
The cost and efficiency of direct air capture (DAC) of carbon dioxide (CO2) will be decisive in determining whether this technology can play a large role in decarbonization. To probe the role of meteorological conditions on DAC we examine, at 1 × 1° resolution for the continental United States (U.S.), the impacts of temperature, humidity, atmospheric pressure, and CO2 concentration for a representative amine-based adsorption process. Spatial and temporal variations in atmospheric pressure and CO2 concentration lead to strong variations in the CO2 available in ambient air across the U.S. The specific DAC process that we examine is described by a process model that accounts for both temperature and humidity. A process that assumes the same operating choices at all locations in the continental U.S. shows strong variations in performance, with the most influential variables being the H2O gas phase volume fraction and temperature, both of which are negatively correlated with DAC productivity for the specific process that we consider. The process also shows a moderate positive correlation of ambient CO2 with productivity and recovery. We show that optimizing the DAC process at seven representative locations to reflect temporal and spatial variations in ambient conditions significantly improves the process performance and, more importantly, would lead to different choices in the sites for the best performance than models based on a single set of process conditions. Our work provides a framework for assessing spatial variations in DAC performance that could be applied to any DAC process and indicates that these variations will have important implications in optimizing and siting DAC facilities.
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Affiliation(s)
- Xuqing Cai
- School
of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Mark A. Coletti
- Oak
Ridge National Laboratory, 1 Bethel Valley Road. Oak Ridge, Tennessee 37831, United States
| | - David S. Sholl
- School
of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Oak
Ridge National Laboratory, 1 Bethel Valley Road. Oak Ridge, Tennessee 37831, United States
| | - Melissa R. Allen-Dumas
- Oak
Ridge National Laboratory, 1 Bethel Valley Road. Oak Ridge, Tennessee 37831, United States
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7
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Tran T, Singh S, Cheng S, Lin H. Scalable and Highly Porous Membrane Adsorbents for Direct Air Capture of CO 2. ACS APPLIED MATERIALS & INTERFACES 2024; 16:22715-22723. [PMID: 38626804 DOI: 10.1021/acsami.4c02873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Direct air capture (DAC) of CO2 is a carbon-negative technology to mitigate carbon emissions, and it requires low-cost sorbents with high CO2 sorption capacity that can be easily manufactured on a large scale. In this work, we develop highly porous membrane adsorbents comprising branched polyethylenimine (PEI) impregnated in low-cost, porous Solupor supports. The effect of the PEI molecular mass and loading on the physical properties of the adsorbents is evaluated, including porosity, degradation temperature, glass transition temperature, and CO2 permeance. CO2 capture from simulated air containing 400 ppm of CO2 in these sorbents is thoroughly investigated as a function of temperature and relative humidity (RH). Polymer dynamics was examined using differential scanning calorimetry (DSC) and broadband dielectric spectroscopy (BDS), showing that CO2 sorption is limited by its diffusion in these PEI-based sorbents. A membrane adsorbent containing 48 mass% PEI (800 Da) with a porosity of 72% exhibits a CO2 sorption capacity of 1.2 mmol/g at 25 °C and RH of 30%, comparable to the state-of-the-art adsorbents. Multicycles of sorption and desorption were performed to determine their regenerability, stability, and potential for practical applications.
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Affiliation(s)
- Thien Tran
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
- U.S. Department of Energy, National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15236, United States
- NETL Support Contractor, Pittsburgh, Pennsylvania 15236, United States
| | - Shweta Singh
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Shiwang Cheng
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, Michigan 48824, United States
| | - Haiqing Lin
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
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8
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Narayanan P, Guntupalli P, Lively RP, Jones CW. Alumina Incorporation in Self-Supported Poly(ethylenimine) Sorbents for Direct Air Capture. CHEM & BIO ENGINEERING 2024; 1:157-170. [PMID: 38566966 PMCID: PMC10983007 DOI: 10.1021/cbe.3c00079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 01/17/2024] [Accepted: 01/28/2024] [Indexed: 04/04/2024]
Abstract
Self-supported branched poly(ethylenimine) scaffolds with ordered macropores are synthesized with and without Al2O3 powder additive by cross-linking poly(ethylenimine) (PEI) with poly(ethylene glycol) diglycidyl ether (PEGDGE) at -196 °C. The scaffolds' CO2 uptake performance is compared with a conventional sorbent, i.e., PEI impregnated on an Al2O3 support. PEI scaffolds with Al2O3 additive show narrow pore size distribution and thinner pore walls than alumina-free materials, facilitating higher CO2 uptake at conditions relevant to direct air capture. The PEI scaffold containing 6.5 wt % Al2O3 had the highest CO2 uptake of 1.23 mmol/g of sorbent under 50% RH 400 ppm of CO2 conditions. In situ DRIFT spectroscopy and temperature-programmed desorption experiments show a significant CO2 uptake contribution via physisorption as well as carbamic acid formation, with lower CO2 binding energies in PEI scaffolds relative to conventional PEI sorbents, likely a result of a lower population of primary amines due to the amine cross-linking reactions during scaffold synthesis. The PEI scaffold containing 6.5 wt % Al2O3 is estimated to have the lowest desorption energy penalty under humid conditions, 4.6 GJ/tCO2, among the sorbents studied.
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Affiliation(s)
- Pavithra Narayanan
- School of Chemical &
Biomolecular Engineering, Georgia Institute
of Technology, Atlanta, Georgia 30332, United States
| | - Pranav Guntupalli
- School of Chemical &
Biomolecular Engineering, Georgia Institute
of Technology, Atlanta, Georgia 30332, United States
| | - Ryan P. Lively
- School of Chemical &
Biomolecular Engineering, Georgia Institute
of Technology, Atlanta, Georgia 30332, United States
| | - Christopher W. Jones
- School of Chemical &
Biomolecular Engineering, Georgia Institute
of Technology, Atlanta, Georgia 30332, United States
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9
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Wang Y, Rim G, Song M, Holmes HE, Jones CW, Lively RP. Cold Temperature Direct Air CO 2 Capture with Amine-Loaded Metal-Organic Framework Monoliths. ACS APPLIED MATERIALS & INTERFACES 2024; 16:1404-1415. [PMID: 38109480 PMCID: PMC10788822 DOI: 10.1021/acsami.3c13528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 11/29/2023] [Accepted: 11/29/2023] [Indexed: 12/20/2023]
Abstract
Zeolites, silica-supported amines, and metal-organic frameworks (MOFs) have been demonstrated as promising adsorbents for direct air CO2 capture (DAC), but the shaping and structuring of these materials into sorbent modules for practical processes have been inadequately investigated compared to the extensive research on powder materials. Furthermore, there have been relatively few studies reporting the DAC performance of sorbent contactors under cold, subambient conditions (temperatures below 20 °C). In this work, we demonstrate the successful fabrication of adsorbent monoliths composed of cellulose acetate (CA) and adsorbent particles such as zeolite 13X and MOF MIL-101(Cr) by a 3D printing technique: solution-based additive manufacturing (SBAM). These monoliths feature interpenetrated macroporous polymeric frameworks in which microcrystals of zeolite 13X or MIL-101(Cr) are evenly distributed, highlighting the versatility of SBAM in fabricating monoliths containing sorbents with different particle sizes and density. Branched poly(ethylenimine) (PEI) is successfully loaded into the CA/MIL-101(Cr) monoliths to impart CO2 uptakes of 1.05 mmol gmonolith-1 at -20 °C and 400 ppm of CO2. Kinetic analysis shows that the CO2 sorption kinetics of PEI-loaded MIL-101(Cr) sorbents are not compromised in the monoliths compared to the powder sorbents. Importantly, these monoliths exhibit promising working capacities (0.95 mmol gmonolith-1) over 14 temperature swing cycles with a moderate regeneration temperature of 60 °C. Dynamic breakthrough experiments at 25 °C under dry conditions reveal a CO2 uptake capacity of 0.60 mmol gmonolith-1, which further increases to 1.05 and 1.43 mmol gmonolith-1 at -20 °C under dry and humid (70% relative humidity) conditions, respectively. Our work showcases the successful implementation of SBAM in making DAC sorbent monoliths with notable CO2 capture performance over a wide range of sorption temperatures, suggesting that SBAM can enable the preparation of efficient sorbent contactors in various form factors for other important chemical separations.
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Affiliation(s)
- Yuxiang Wang
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332, United States
| | - Guanhe Rim
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332, United States
| | - MinGyu Song
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332, United States
| | - Hannah E. Holmes
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332, United States
| | - Christopher W. Jones
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332, United States
| | - Ryan P. Lively
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332, United States
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10
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Chen M, Li M, Liang Y, Meng W, Zhang Z, Wu Y, Li X, Zhang F. Improvement in CO 2 Capture of Polyamine with Micro-Interfacial System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:14451-14458. [PMID: 37773886 DOI: 10.1021/acs.langmuir.3c02053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/01/2023]
Abstract
Polyamines have emerged as a promising class of CO2 absorbents due to their remarkable sequestration capacity. However, their potential industrial application as aqueous absorbents is significantly hindered by a low regeneration efficiency and high energy consumption. To address these issues, this study investigates the use of triethylenetetramine (TETA) and ethylene glycol (EG) to develop a nonaqueous absorbent. The incorporation of EG enhances absorption performance and reduces the regeneration energy needed for TETA, whereas the high viscosity of the absorbent impedes absorption rate, amine efficiency, and regeneration efficiency. In order to enhance CO2 capture, micron-sized reaction units (SiO2@TETA-EG) were developed by encapsulating TETA solution with nanosilica. The SiO2@TETA-EG composite exhibits a large specific surface area (99 m2/g), with a porous shell structure and improved fluidity, which effectively counteracts the negative effects caused by high viscosity. Notably, SiO2@TETA-EG indicates a noticeably higher apparent rate constant of 4.29 min-1 at 323.2 K compared to the TETA-EG solution. Furthermore, SiO2@TETA-EG displays a 28.4% boost in regeneration efficiency while maintaining favorable stability in pore size and shape after regeneration.
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Affiliation(s)
- Meisi Chen
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education (MOE), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, China
| | - Mengjia Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education (MOE), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, China
| | - Yinchun Liang
- Nantong Cellulose Fibers Co., Ltd., Nantong, Jiangsu 226008, China
| | - Weimin Meng
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education (MOE), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, China
| | - Zhibing Zhang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education (MOE), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, China
| | - Youting Wu
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education (MOE), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, China
| | - Xinyao Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education (MOE), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, China
| | - Feng Zhang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education (MOE), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, China
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11
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Rim G, Priyadarshini P, Song M, Wang Y, Bai A, Realff MJ, Lively RP, Jones CW. Support Pore Structure and Composition Strongly Influence the Direct Air Capture of CO 2 on Supported Amines. J Am Chem Soc 2023; 145:7190-7204. [PMID: 36972200 PMCID: PMC10080690 DOI: 10.1021/jacs.2c12707] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Indexed: 03/29/2023]
Abstract
A variety of amine-impregnated porous solid sorbents for direct air capture (DAC) of CO2 have been developed, yet the effect of amine-solid support interactions on the CO2 adsorption behavior is still poorly understood. When tetraethylenepentamine (TEPA) is impregnated on two different supports, commercial γ-Al2O3 and MIL-101(Cr), they show different trends in CO2 sorption when the temperature (-20 to 25 °C) and humidity (0-70% RH) of the simulated air stream are varied. In situ IR spectroscopy is used to probe the mechanism of CO2 sorption on the two supported amine materials, with weak chemisorption (formation of carbamic acid) being the dominant pathway over MIL-101(Cr)-supported TEPA and strong chemisorption (formation of carbamate) occurring over γ-Al2O3-supported TEPA. Formation of both carbamic acid and carbamate species is enhanced over the supported TEPA materials under humid conditions, with the most significant enhancement observed at -20 °C. However, while equilibrium H2O sorption is high at cold temperatures (e.g., -20 °C), the effect of humidity on a practical cyclic DAC process is expected to be minimal due to slow H2O uptake kinetics. This work suggests that the CO2 capture mechanisms of impregnated amines can be controlled by adjusting the degree of amine-solid support interaction and that H2O adsorption behavior is strongly affected by the properties of the support materials. Thus, proper selection of solid support materials for amine impregnation will be important for achieving optimized DAC performance under varied deployment conditions, such as cold (e.g., -20 °C) or ambient temperature (e.g., 25 °C) operations.
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Affiliation(s)
- Guanhe Rim
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332-0100, United States
| | - Pranjali Priyadarshini
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332-0100, United States
| | - MinGyu Song
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332-0100, United States
| | - Yuxiang Wang
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332-0100, United States
| | - Andrew Bai
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332-0100, United States
| | - Matthew J. Realff
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332-0100, United States
| | - Ryan P. Lively
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332-0100, United States
| | - Christopher W. Jones
- School of Chemical & Biomolecular
Engineering, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, Georgia 30332-0100, United States
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