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Chaban VV, Andreeva NA, Bernard FL, M Dos Santos L, Einloft S. Chemical similarity of dialkyl carbonates and carbon dioxide opens an avenue for novel greenhouse gas scavengers: cheap recycling and low volatility via experiments and simulations. Phys Chem Chem Phys 2023; 25:9320-9335. [PMID: 36920377 DOI: 10.1039/d2cp06089b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Global warming linked to the industrial emissions of greenhouse gases may be the end of mankind unless it is adequately and timely handled. To prevent irreversible changes to the climate of the Earth, numerous research groups are striving to develop robust CO2 sorbents. Dialkyl carbonates (DACs) and CO2 exhibit obvious chemical similarities in their structure and properties. The degrees of oxidation of all atoms composing DACs and CO2 are identical resulting in very similar nucleophilicities and electrophilicities of all interaction centers. While both compounds possess relatively high partial atomic charges on their polar moieties, the molecular geometries prevent tight binding of the head groups. The computed DAC-DAC binding energies are ∼40 kJ mol-1, whereas the effect of the alkyl chain length is marginal. The phase transition points and shear viscosities of DACs are very low. We herein hypothesize and numerically rationalize that DACs represent noteworthy physical sorbents for CO2 thanks to the similar sorbent-CO2 and sorbent-sorbent interaction energies. By reporting in silico-derived sorption thermodynamics at various conditions, spectral and structural properties, and experimentally derived CO2 capacities and recyclabilities, we highlight the mutual affinity of DACs and CO2. Indeed, the experimentally determined CO2 sorption capacity of 0.88 mol% (diethyl carbonate) at 278.15 K and 30 bar is competitive. The unprecedentedly low DAC-CO2 binding energies, ∼14 kJ mol-1, suggest a low-cost desorption process and outstanding recyclability of the sorbent. We also note that DACs possessing long alkyl chains (butyl, hexyl, octyl) exhibit negligible volatilities, while preserving the liquid aggregate state over a practically important temperature range. The reported results may foster the development of a new class of CO2 scavengers with possibly quite peculiar characteristics.
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Affiliation(s)
| | - Nadezhda A Andreeva
- Peter the Great St. Petersburg Polytechnic University, Russian Federation.,School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil
| | - Franciele L Bernard
- School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil
| | - Leonardo M Dos Santos
- School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil
| | - Sandra Einloft
- School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil.,Post-Graduation Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul - PUCRS, Brazil
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Nigro A, Santos LMD, Donadel JSF, Winneschhofer APFF. DESCRIÇÃO DE SÉRIE DE CASOS DE LINFOMA T CUT NEO EM PACIENTES PEDIÁTRICOS ATENDIDOS EM UM HOSPITAL PEDIÁTRICO DE REFERÊNCIA ESTADUAL. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Cardoso RA, Silva AC, Bonifácio SL, Carvalho FO, Santos LMD, Santos JAD, Junior RAD, Rocha V, Mendrone-Junior A, Dinardo CL. PACIENTES ONCOLÓGICOS E AS COMPLICAÇÕES NOS TESTES IMUNO-HEMATOLÓGICOS. Hematol Transfus Cell Ther 2021. [DOI: 10.1016/j.htct.2021.10.550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Dos Santos LM, Bernard FL, Polesso BB, Pinto IS, Frankenberg CC, Corvo MC, Almeida PL, Cabrita E, Einloft S. Designing silica xerogels containing RTIL for CO 2 capture and CO 2/CH 4 separation: Influence of ILs anion, cation and cation side alkyl chain length and ramification. J Environ Manage 2020; 268:110340. [PMID: 32383660 DOI: 10.1016/j.jenvman.2020.110340] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 01/24/2020] [Accepted: 02/24/2020] [Indexed: 06/11/2023]
Abstract
CO2 separation from natural gas is considered to be a crucial strategy to mitigate global warming problems, meet product specification, pipeline specs and other application specific requirements. Silica xerogels (SX) are considered to be potential materials for CO2 capture due to their high specific surface area. Thus, a series of silica xerogels functionalized with imidazolium, phosphonium, ammonium and pyridinium-based room-temperature ionic liquids (RTILs) were synthesized. The synthesized silica xerogels were characterized by NMR, helium pycnometry, DTA-TG, BET, SEM and TEM. CO2 sorption, reusability and CO2/CH4 selectivity were assessed by the pressure-decay technique. Silica xerogels containing IL demonstrated advantages compared to RTILs used as separation solvents in CO2 capture processes including higher CO2 sorption capacity and faster sorption/desorption. Using fluorinated anion for functionalization of silica xerogels leads to a higher affinity for CO2 over CH4. The best performance was obtained by SX- [bmim] [TF2N] (223.4 mg CO2/g mg/g at 298.15 K and 20 bar). Moreover, SX- [bmim] [TF2N] showed higher CO2 sorption capacity as compared to other reported sorbents. CO2 sorption and CO2/CH4 selectivity results were submitted to an analysis of variance and the means compared using Tukey's test (5%).
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Affiliation(s)
- Leonardo M Dos Santos
- School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil
| | - Franciele L Bernard
- School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil
| | - Bárbara B Polesso
- Post-Graduation Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil
| | - Ingrid S Pinto
- School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil
| | - Claudio C Frankenberg
- School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil
| | - Marta C Corvo
- CENIMAT|i3N, Dep. Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Caparica, Portugal
| | - Pedro L Almeida
- CENIMAT|i3N, Dep. Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Caparica, Portugal; ISEL, ADF, Rua Conselheiro Emídio Navarro 1, Lisboa, Portugal
| | - Eurico Cabrita
- UCIBIO, Dep.Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Caparica, Portugal
| | - Sandra Einloft
- School of Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil; Post-Graduation Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul, PUCRS, Brazil.
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