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Shama VM, Swami AR, Aniruddha R, Sreedhar I, Reddy BM. Process and engineering aspects of carbon capture by ionic liquids. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101507] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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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. JOURNAL OF ENVIRONMENTAL MANAGEMENT 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] [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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Kirdeciler SK, Soy E, Öztürk S, Kucherenko I, Soldatkin O, Dzyadevych S, Akata B. A novel urea conductometric biosensor based on zeolite immobilized urease. Talanta 2011; 85:1435-41. [DOI: 10.1016/j.talanta.2011.06.034] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2011] [Revised: 06/03/2011] [Accepted: 06/11/2011] [Indexed: 10/18/2022]
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Huang J, Zhang X, Lin Q, He X, Xing X, Huai H, Lian W, Zhu H. Electrochemical sensor based on imprinted sol–gel and nanomaterials for sensitive determination of bisphenol A. Food Control 2011. [DOI: 10.1016/j.foodcont.2010.11.017] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Matak MY, Moghaddam ME. The role of short-range Cys171-Cys178 disulfide bond in maintaining cutinase active site integrity: a molecular dynamics simulation. Biochem Biophys Res Commun 2009; 390:201-4. [PMID: 19781526 DOI: 10.1016/j.bbrc.2009.09.073] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2009] [Accepted: 09/17/2009] [Indexed: 11/30/2022]
Abstract
Understanding structural determinants in enzyme active site integrity can provide a good knowledge to design efficient novel catalytic machineries. Fusarium solani pisi cutinase with classic triad Ser-His-Asp is a promising enzyme to scrutinize these structural determinants. We performed two MD simulations: one, with the native structure, and the other with the broken Cys171-Cys178 disulfide bond. This disulfide bond stabilizes a turn in active site on which catalytic Asp175 is located. Functionally important H-bonds and atomic fluctuations in catalytic pocket have been changed. We proposed that this disulfide bond within active site can be considered as an important determinant of cutinase active site structural integrity.
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Affiliation(s)
- Mehdi Youssefi Matak
- Department of Biophysics, Faculty of Biological Science, Tarbiat Modares University, Tehran, Iran
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