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Ab Rahim AH, Yunus NM, Jaffar Z, Allim MF, Othman Zailani NZ, Mohd Fariddudin SA, Abd Ghani N, Umar M. Synthesis and characterization of ammonium-based protic ionic liquids for carbon dioxide absorption. RSC Adv 2023; 13:14268-14280. [PMID: 37179994 PMCID: PMC10168136 DOI: 10.1039/d3ra01345f] [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: 02/28/2023] [Accepted: 05/03/2023] [Indexed: 05/15/2023] Open
Abstract
A series of ammonium-based protic ionic liquids (APILs) namely ethanolammonium pentanoate [ETOHA][C5], ethanolammonium heptanoate [ETOHA][C7], triethanolammonium pentanoate [TRIETOHA][C5], triethanolammonium heptanoate [TRIETOHA][C7], tributylammonium pentanoate [TBA][C5] and tributylammonium heptanoate [TBA][C7] was synthesized via proton transfer. Their structural confirmation and physiochemical properties namely thermal stability, phase transition, density, heat capacity (Cp) and refractive index (RI) have been determined. Specifically, [TRIETOHA] APILs have crystallization peaks ranging from -31.67 to -1.00 °C, owing to their large density values. A comparison study revealed the low Cp values of APILs in comparison to monoethanolamine (MEA) which could be advantageous for APILs to be used in CO2 separation during recyclability processes. Additionally, the performance of APILs toward CO2 absorption was investigated by using a pressure drop technique under a pressure range of 1-20 bar at 298.15 K. It was observed that [TBA][C7] recorded the highest CO2 absorption capacity with the value of 0.74 mole fraction at 20 bar. Additionally, the regeneration of [TBA][C7] for CO2 absorption was studied. Analysis of the measured CO2 absorption data showed marginal reduction in the mole fraction of CO2 absorbed between fresh and recycled [TBA][C7] thus proving the promising potential of APILs as good liquid absorbents for CO2 removal.
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Affiliation(s)
- Asyraf Hanim Ab Rahim
- Institute of Contaminant Management, Centre for Research in Ionic Liquid (CORIL), Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Normawati M Yunus
- Institute of Contaminant Management, Centre for Research in Ionic Liquid (CORIL), Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Zahirah Jaffar
- Institute of Contaminant Management, Centre for Research in Ionic Liquid (CORIL), Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Muhammad Faizadmesa Allim
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Nurhidayah Zulakha Othman Zailani
- Institute of Contaminant Management, Centre for Research in Ionic Liquid (CORIL), Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | | | - Noraini Abd Ghani
- Institute of Contaminant Management, Centre for Research in Ionic Liquid (CORIL), Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS 32610 Seri Iskandar Perak Malaysia
| | - Mursyidah Umar
- Department of Petroleum Engineering, Faculty of Engineering, Universitas Islam Riau Jalan Kaharuddin Nasution, No. 113 Pekanbaru Riau 28284 Indonesia
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Zhao H, Baker GA. Functionalized Ionic Liquids for CO 2 Capture under Ambient Pressure. GREEN CHEMISTRY LETTERS AND REVIEWS 2022; 16:2149280. [PMID: 37304337 PMCID: PMC10254919 DOI: 10.1080/17518253.2022.2149280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 11/15/2022] [Indexed: 06/13/2023]
Abstract
Ionic liquids (ILs) have been widely explored as alternative solvents for carbon dioxide (CO2) capture and utilization. However, most of these processes are under pressures significantly higher than atmospheric level, which not only levies additional equipment and operation costs, but also makes the large-scale CO2 capture and conversion less practical. In this study, we rationally designed glycol ether-functionalized imidazolium, phosphonium and ammonium ILs containing acetate (OAc-) or Tf2N- anions, and found these task-specific ILs could solubilize up to 0.55 mol CO2 per mole of IL (or 5.9 wt% CO2) at room temperature and atmospheric pressure. Although acetate anions enabled a better capture of CO2, Tf2N- anions are more compatible with alcohol dehydrogenase (ADH), which is a key enzyme involved in the cascade enzymatic conversion of CO2 to methanol. Our promising results indicate the possibility of CO2 capture under ambient pressure and its enzymatic conversion to valuable commodity.
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Affiliation(s)
- Hua Zhao
- Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, USA
| | - Gary A. Baker
- Department of Chemistry, University of Missouri, Columbia, MO 65211, USA
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Silva LP, Crespo EA, Martins MAR, Barbosa PC, Gardas RL, Vega LF, Coutinho JAP, Carvalho PJ. Encapsulated Protic Ionic Liquids as Sustainable Materials for CO 2 Separation. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Liliana P. Silva
- CICECO─Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Emanuel A. Crespo
- CICECO─Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mónia A. R. Martins
- CICECO─Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Paula C. Barbosa
- CICECO-Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Ramesh L. Gardas
- Department of Chemistry, Indian Institute of Technology Madras, 600 036 Chennai, India
| | - Lourdes F. Vega
- Research and Innovation Center on CO2 and H2 (RICH Center) and Chemical Engineering Department, Khalifa University of Science and Technology,
P. O. Box 127788 Abu Dhabi, United Arab Emirates
| | - João A. P. Coutinho
- CICECO─Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Pedro J. Carvalho
- CICECO─Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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Experimental Investigation on Thermophysical Properties of Ammonium-Based Protic Ionic Liquids and Their Potential Ability towards CO 2 Capture. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27030851. [PMID: 35164113 PMCID: PMC8839255 DOI: 10.3390/molecules27030851] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/23/2022] [Accepted: 01/24/2022] [Indexed: 11/29/2022]
Abstract
Ionic liquids, which are extensively known as low-melting-point salts, have received significant attention as the promising solvent for CO2 capture. This work presents the synthesis, thermophysical properties and the CO2 absorption of a series of ammonium cations coupled with carboxylate anions producing ammonium-based protic ionic liquids (PILs), namely 2-ethylhexylammonium pentanoate ([EHA][C5]), 2-ethylhexylammonium hexanoate ([EHA][C6]), 2-ethylhexylammonium heptanoate ([EHA][C7]), bis-(2-ethylhexyl)ammonium pentanoate ([BEHA][C5]), bis-(2-ethylhexyl)ammonium hexanoate ([BEHA][C6]) and bis-(2-ethylhexyl)ammonium heptanoate ([BEHA][C7]). The chemical structures of the PILs were confirmed by using Nuclear Magnetic Resonance (NMR) spectroscopy while the density (ρ) and the dynamic viscosity (η) of the PILs were determined and analyzed in a range from 293.15K up to 363.15K. The refractive index (nD) was also measured at T = (293.15 to 333.15) K. Thermal analyses conducted via a thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC) indicated that all PILs have the thermal decomposition temperature, Td of greater than 416K and the presence of glass transition, Tg was detected in each PIL. The CO2 absorption of the PILs was studied up to 29 bar at 298.15 K and the experimental results showed that [BEHA][C7] had the highest CO2 absorption with 0.78 mol at 29 bar. The CO2 absorption values increase in the order of [C5] < [C6] < [C7] anion regardless of the nature of the cation.
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Latini G, Signorile M, Rosso F, Fin A, d’Amora M, Giordani S, Pirri F, Crocellà V, Bordiga S, Bocchini S. Efficient and reversible CO2 capture in bio-based ionic liquids solutions. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2021.101815] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Shmukler L, Fedorova I, Fadeeva YA, Safonova L. The physicochemical properties and structure of alkylammonium protic ionic liquids of RnH4-nNX (n = 1–3) family. A mini–review. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114350] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Thermophysical Properties of Newly Synthesized Ammonium-Based Protic Ionic Liquids: Effect of Temperature, Anion and Alkyl Chain Length. Processes (Basel) 2020. [DOI: 10.3390/pr8060742] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Ionic liquids which are often classified as low melting point salts have received significant attention from research groups and industries to be used in a wide range of applications. Many of these applications require thorough knowledge on the thermophysical properties of the ionic liquids before utilizing their full potentials in various fields. In this work, a series of alkylammonium cation and carboxylate anion-based room temperature protic ionic liquids (PILs) were synthesized by varying length of alkyl chain of the cation from diethyl to dibutyl combined with pentanoate, hexanoate and heptanoate anions. These ammonium-based PILs named as diethylammonium pentanoate [DEA][C5], diethylammonium hexanoate [DEA][C6], diethylammonium heptanoate [DEA][C7], dibutylammonium pentanoate [DBA][C5], dibutylammonium hexanoate [DBA][C6] and dibutylammonium heptanoate [DBA][C7] were characterized using Nuclear Magnetic Resonance (NMR) spectroscopy. The thermophysical properties of the PILs namely density, dynamic viscosity and refractive index were measured and analyzed. Density, ρ and dynamic viscosity, η were determined at T = (293.15 to 363.15) K and refractive index, nD was measured at T = (293.15 to 333.15) K. The fitting parameters are proposed for the empirical correlations of density, dynamic viscosity and refractive index. The values of thermal expansion coefficient, αp, molecular volume, Vm, standard entropy, S° and lattice potential energy, Upot also have been calculated by using the specified equations. The thermal decomposition temperature, Td was also determined using a thermogravimetric analyzer (TGA) while the differential scanning calorimetry (DSC) technique provided the glass transition, Tg, melting point, Tm and crystallization, Tc temperatures of the PILs. The experimental results revealed that the dependency of the experimental values namely the ρ, η, nD, and Td on the alkyl chain of the anion, size of the cations and the temperature of measurement.
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Special Issue “Green Technologies: Bridging Conventional Practices and Industry 4.0”. Processes (Basel) 2020. [DOI: 10.3390/pr8050552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Green technologies have been globally accepted as efficient and sustainable techniques for the utilization of natural resources [...]
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