1
|
Lund A, Manohara GV, Song AY, Jablonka KM, Ireland CP, Cheah LA, Smit B, Garcia S, Reimer JA. Characterization of Chemisorbed Species and Active Adsorption Sites in Mg-Al Mixed Metal Oxides for High-Temperature CO 2 Capture. Chem Mater 2022; 34:3893-3901. [PMID: 35573112 PMCID: PMC9097159 DOI: 10.1021/acs.chemmater.1c03101] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 03/17/2022] [Indexed: 06/15/2023]
Abstract
Mg-Al mixed metal oxides (MMOs), derived from the decomposition of layered double hydroxides (LDHs), have been purposed as adsorbents for CO2 capture of industrial plant emissions. To aid in the design and optimization of these materials for CO2 capture at 200 °C, we have used a combination of solid-state nuclear magnetic resonance (ssNMR) and density functional theory (DFT) to characterize the CO2 gas sorption products and determine the various sorption sites in Mg-Al MMOs. A comparison of the DFT cluster calculations with the observed 13C chemical shifts of the chemisorbed products indicates that mono- and bidentate carbonates are formed at the Mg-O sites with adjacent Al substitution of an Mg atom, while the bicarbonates are formed at Mg-OH sites without adjacent Al substitution. Quantitative 13C NMR shows an increase in the relative amount of strongly basic sites, where the monodentate carbonate product is formed, with increasing Al/Mg molar ratios in the MMOs. This detailed understanding of the various basic Mg-O sites presented in MMOs and the formation of the carbonate, bidentate carbonate, and bicarbonate chemisorbed species yields new insights into the mechanism of CO2 adsorption at 200 °C, which can further aid in the design and capture capacity optimization of the materials.
Collapse
Affiliation(s)
- Alicia Lund
- Materials
Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department
of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - G. V. Manohara
- Research
Center for Carbon Solutions (RCCS), School of Engineering and Physical
Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K.
| | - Ah-Young Song
- Materials
Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department
of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Kevin Maik Jablonka
- Laboratory
of Molecular Simulation (LSMO), Institut
des Sciences et Ingénierie Chimiques, École Polytechnique
Fédérale de Lausanne (EPFL), Rue de l’Industrie 17, Sion CH-1951, Switzerland
| | - Christopher P. Ireland
- Laboratory
of Molecular Simulation (LSMO), Institut
des Sciences et Ingénierie Chimiques, École Polytechnique
Fédérale de Lausanne (EPFL), Rue de l’Industrie 17, Sion CH-1951, Switzerland
| | - Li Anne Cheah
- Research
Center for Carbon Solutions (RCCS), School of Engineering and Physical
Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K.
| | - Berend Smit
- Laboratory
of Molecular Simulation (LSMO), Institut
des Sciences et Ingénierie Chimiques, École Polytechnique
Fédérale de Lausanne (EPFL), Rue de l’Industrie 17, Sion CH-1951, Switzerland
| | - Susana Garcia
- Research
Center for Carbon Solutions (RCCS), School of Engineering and Physical
Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K.
| | - Jeffrey A. Reimer
- Materials
Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department
of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| |
Collapse
|
2
|
Manohara GV, Norris D, Maroto-Valer MM, Garcia S. Acetate intercalated Mg-Al layered double hydroxides (LDHs) through modified amide hydrolysis: a new route to synthesize novel mixed metal oxides (MMOs) for CO 2 capture. Dalton Trans 2021; 50:7474-7483. [PMID: 33970176 DOI: 10.1039/d1dt00602a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Layered double hydroxide (LDH) based mixed metal oxides (MMOs) are promising high temperature CO2 capture sorbents. In order to improve their CO2 capture capacity, it is crucial to bring in changes to their physicochemical properties such as morphology, particle size, surface area and activity by tuning the synthesis method. Here we report a modified amide hydrolysis method to synthesize LDHs with a mixed morphology and better CO2 capture properties. Acetate intercalated Mg-Al LDHs with two different Mg/Al ratios (3 and 4) were synthesized by employing metal hydroxides as the starting precursors and acetamide as the hydrolysing agent. The resultant LDHs crystallized in a new morphology having a combination of both fibrous and sheet like crystallites. The MMOs derived from Mg-Al-acetate LDHs retained the mixed morphology observed in the precursor LDHs. The resultant MMOs showed almost a threefold increase in the BET surface area, 316 (Mg/Al = 3) and 341 (Mg/Al = 4) m2 g-1, compared to MMOs derived from anion exchanged Mg-Al-acetate LDH (118 m2 g-1). The MMOs synthesized by acetamide hydrolysis captured 1.2 mmol g-1 and 0. 87 mmol g-1 of CO2 at 200 and 300 °C (atmospheric pressure), respectively. The CO2 capture capacity realized was increased more than twofold compared to the CO2 capture capacity of MMOs derived from anion exchanged acetate LDH (0.57 mmol g-1) tested under similar conditions. The developed MMOs showed promising CO2 capture (1.0 mmol g-1) capacity at industrially relevant CO2 concentration (14%).
Collapse
Affiliation(s)
- G V Manohara
- Research Centre for Carbon Solutions (RCCS), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - David Norris
- Research Centre for Carbon Solutions (RCCS), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - M Mercedes Maroto-Valer
- Research Centre for Carbon Solutions (RCCS), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Susana Garcia
- Research Centre for Carbon Solutions (RCCS), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| |
Collapse
|
3
|
Nityashree N, Manohara GV, Maroto-Valer MM, Garcia S. Advanced High-Temperature CO 2 Sorbents with Improved Long-Term Cycling Stability. ACS Appl Mater Interfaces 2020; 12:33765-33774. [PMID: 32609484 DOI: 10.1021/acsami.0c08652] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Developing novel sorbents with maximum carbonation efficiency and good cycling stability for CO2 capture is a promising route to sequester anthropogenic CO2. In this work, we have employed a green synthesis method to synthesize CaO-based sorbents suitably stabilized by MgO and supported by in situ generated carbon under inert atmosphere. The varied amounts (10-30 wt %) of MgO were used to stabilize the CaO. The supported mixed metal oxide (MMO) sorbents were screened for high-temperature CO2 capture under CO2 rich (86% CO2) and lean (14% CO2) gas streams at 650 °C and atmospheric pressure. The MMO sorbents captured 53-63 wt % of CO2 per gram of sorbent under 86 and 14% CO2, accounting for about 98% carbonation efficiency, which outperforms the CO2 capture capacity of limestone derived CaO (L-CaO) sorbents (22.8 wt %). All of the synthetic MMO sorbents showed greater capture capacity and cyclic stability when compared to benchmark L-CaO. Because of the high carbonation efficiency and cycling stability of g-Ca0.69Mg0.3O sorbent, it was tested for 100 carbonation/regeneration cycles of 5 min each under CO2 lean conditions. The g-Ca0.69Mg0.3O sorbent showed exceptional CO2 capture capacity and cycling stability and retained about 65% of its initial capture capacity after 100 cycles.
Collapse
Affiliation(s)
- N Nityashree
- Research Centre for Carbon Solutions (RCCS), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - G V Manohara
- Research Centre for Carbon Solutions (RCCS), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - M Mercedes Maroto-Valer
- Research Centre for Carbon Solutions (RCCS), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - S Garcia
- Research Centre for Carbon Solutions (RCCS), School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| |
Collapse
|
4
|
Cheah LA, Manohara GV, Maroto‐Valer MM, Garcia S. Layered Double Hydroxide (LDH)‐Derived Mixed Metal Oxides (MMOs): A Systematic Crystal‐Chemical Approach to Investigating the Chemical Composition and its Effect on High Temperature CO
2
capture. ChemistrySelect 2020. [DOI: 10.1002/slct.201904447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Li Anne Cheah
- Research Centre for Carbon Solutions (RCCS)School of Engineering and Physical SciencesHeriot-Watt University Edinburgh EH14 4AS United Kingdom
| | - G. V. Manohara
- Research Centre for Carbon Solutions (RCCS)School of Engineering and Physical SciencesHeriot-Watt University Edinburgh EH14 4AS United Kingdom
| | - M. Mercedes Maroto‐Valer
- Research Centre for Carbon Solutions (RCCS)School of Engineering and Physical SciencesHeriot-Watt University Edinburgh EH14 4AS United Kingdom
| | - Susana Garcia
- Research Centre for Carbon Solutions (RCCS)School of Engineering and Physical SciencesHeriot-Watt University Edinburgh EH14 4AS United Kingdom
| |
Collapse
|
5
|
Manohara GV, Maroto-Valer MM, Garcia S. The effect of the layer-interlayer chemistry of LDHs on developing high temperature carbon capture materials. Dalton Trans 2020; 49:923-931. [DOI: 10.1039/c9dt03913a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(a) SEM image of the fresh MMOs, (b) carbonation/regeneration cycles, and (c) SEM image of the MMOs after 60 carbonation/regeneration cycles of the Ca–Al-ada LDHs.
Collapse
Affiliation(s)
- G. V. Manohara
- Research Centre for Carbon Solutions (RCCS)
- School of Engineering and Physical Sciences
- Heriot-Watt University
- Edinburgh EH14 4AS
- UK
| | - M. Mercedes Maroto-Valer
- Research Centre for Carbon Solutions (RCCS)
- School of Engineering and Physical Sciences
- Heriot-Watt University
- Edinburgh EH14 4AS
- UK
| | - Susana Garcia
- Research Centre for Carbon Solutions (RCCS)
- School of Engineering and Physical Sciences
- Heriot-Watt University
- Edinburgh EH14 4AS
- UK
| |
Collapse
|
6
|
Manohara GV, Whiting A, Greenwell HC. Reduced to Hierarchy: Carbon Filament-Supported Mixed Metal Oxide Nanoparticles. ACS Omega 2019; 4:20230-20236. [PMID: 31815224 PMCID: PMC6893949 DOI: 10.1021/acsomega.9b02534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 10/29/2019] [Indexed: 06/10/2023]
Abstract
We describe a one-pot synthesis method for carbon filament-supported mixed metal oxide nanoparticles. The thermal intracrystalline reaction of adamantanecarboxylate ions confined inside interlayer galleries of layered double hydroxide materials under a reducing atmosphere (H2) leads to carbon filaments forming in situ within the material. Raman spectroscopy and combined microscopy techniques show the formation of hybrid organic-inorganic carbon filaments with the mixed metal oxide particles interleaved.
Collapse
Affiliation(s)
- G. V. Manohara
- Department
of Chemistry and Department of Earth Sciences, Durham University, Durham DH1 3LE, U.K.
- Institute
of Mechanical, Process and Energy Engineering (IMPEE), Heriot-Watt University, Edinburgh EH14 4AS, U.K.
| | - Andrew Whiting
- Department
of Chemistry and Department of Earth Sciences, Durham University, Durham DH1 3LE, U.K.
| | - H. Chris Greenwell
- Department
of Chemistry and Department of Earth Sciences, Durham University, Durham DH1 3LE, U.K.
| |
Collapse
|
7
|
Manohara GV, Li L, Whiting A, Greenwell HC. Ultra-high aspect ratio hybrid materials: the role of organic guest and synthesis method. Dalton Trans 2018; 47:2933-2938. [DOI: 10.1039/c7dt04312k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hybrid layered double hydroxide materials with high aspect ratio have been prepared by slow hydrolysis of metal hydroxides with hydrophobic anions.
Collapse
Affiliation(s)
- G. V. Manohara
- Centre for Sustainable Chemical Processes
- Durham University
- Durham
- UK
| | - Li Li
- Department of Chemistry
- Durham University
- Durham
- UK
| | - Andrew Whiting
- Centre for Sustainable Chemical Processes
- Durham University
- Durham
- UK
| | | |
Collapse
|
8
|
|
9
|
Manohara GV, Vishnu Kamath P. Synthesis of the Benzoate Intercalated Layered Double Hydroxide of Nickel and Aluminum: Application of Mering's Rule. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300275] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
10
|
Manohara GV, Prasanna SV, Kamath PV. Structure and Composition of the Layered Double Hydroxides of Mg and Fe: Implications for Anion-Exchange Reactions. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100104] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
11
|
Manohara GV, Kunz DA, Kamath PV, Milius W, Breu J. Homogeneous precipitation by formamide hydrolysis: synthesis, reversible hydration, and aqueous exfoliation of the layered double hydroxide (LDH) of Ni and Al. Langmuir 2010; 26:15586-15591. [PMID: 20839796 DOI: 10.1021/la103108f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Homogenous precipitation by formamide hydrolysis results in the formation of a formate-intercalated layered double hydroxide (LDH) of Ni(II) and Al(III). The formate-LDH is sensitive to the atmospheric humidity and reversibly exchanges its intercalated water with atmospheric moisture. The hydration/dehydration cycle is complete within a narrow range of 0-30% relative humidity with significant hysteresis and involves a randomly interstratified intermediate phase. When immersed in water, the formate ion grows its hydration sphere (osmotic swelling), eventually leading to the exfoliation of the metal hydroxide layers into lamellar particles having in-plane dimensions of 100-200 nm and a thickness of 9-12 nm. These nanoplatelets restack to thicker tactoids again upon evaporation of the dispersion. The intercalated formate ion can be exchanged with nitrate ions in solution but not with iodide ions. These observations have implications for many applications of LDHs in the area of carbon dioxide sorption and catalysis.
Collapse
Affiliation(s)
- G V Manohara
- Department of Chemistry, Central College, Bangalore University, Bangalore 560 001, India
| | | | | | | | | |
Collapse
|