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Morphology and CO2 adsorption performance of novel ionic liquid microcapsules containing [Bmim][PF6]. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.09.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Boada R, Cibin G, Coleman F, Diaz-Moreno S, Gianolio D, Hardacre C, Hayama S, Holbrey JD, Ramli R, Seddon KR, Srinivasan G, Swadźba-Kwaśny M. Mercury capture on a supported chlorocuprate(ii) ionic liquid adsorbent studied using operando synchrotron X-ray absorption spectroscopy. Dalton Trans 2018; 45:18946-18953. [PMID: 27844084 DOI: 10.1039/c6dt03014a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Mercury scrubbing from gas streams using a supported 1-butyl-3-methylimidazolium chlorocuprate(ii) ionic liquid ([C4mim]2[Cu2Cl6]) has been studied using operando EXAFS. Initial oxidative capture as [HgCl3]- anions was confirmed, this was then followed by the unanticipated generation of mercury(i) chloride through comproportionation with additional mercury from the gas stream. Combining these two mechanisms leads to net one electron oxidative extraction of mercury from the gas with increased potential capacity and efficiency for supported ionic liquid mercury scrubbers.
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Affiliation(s)
- Roberto Boada
- Diamond Light Source, Harwell Science & Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Giannantonio Cibin
- Diamond Light Source, Harwell Science & Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Fergal Coleman
- QUILL, School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast, BT9 5AG, Northern Ireland, UK.
| | - Sofia Diaz-Moreno
- Diamond Light Source, Harwell Science & Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Diego Gianolio
- Diamond Light Source, Harwell Science & Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Christopher Hardacre
- QUILL, School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast, BT9 5AG, Northern Ireland, UK.
| | - Shusaku Hayama
- Diamond Light Source, Harwell Science & Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - John D Holbrey
- QUILL, School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast, BT9 5AG, Northern Ireland, UK.
| | - Rafin Ramli
- QUILL, School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast, BT9 5AG, Northern Ireland, UK.
| | - Kenneth R Seddon
- QUILL, School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast, BT9 5AG, Northern Ireland, UK.
| | - Geetha Srinivasan
- QUILL, School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast, BT9 5AG, Northern Ireland, UK.
| | - Małgorzata Swadźba-Kwaśny
- QUILL, School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast, BT9 5AG, Northern Ireland, UK.
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Abstract
Until very recently, the term Lewis acidic ionic liquids (ILs) was nearly synonymous with halometallate ILs, with a strong focus on chloroaluminate(III) systems. The first part of this review covers the historical context in which these were developed, speciation of a range of halometallate ionic liquids, attempts to quantify their Lewis acidity, and selected recent applications: in industrial alkylation processes, in supported systems (SILPs/SCILLs) and in inorganic synthesis. In the last decade, interesting alternatives to halometallate ILs have emerged, which can be divided into two sub-sections: (1) liquid coordination complexes (LCCs), still based on halometallate species, but less expensive and more diverse than halometallate ionic liquids, and (2) ILs with main-group Lewis acidic cations. The two following sections cover these new liquid Lewis acids, also highlighting speciation studies, Lewis acidity measurements, and applications.
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Affiliation(s)
- Lucy C Brown
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK
| | - James M Hogg
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK
| | - Małgorzata Swadźba-Kwaśny
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK.
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Abai M, Atkins MP, Hassan A, Holbrey JD, Kuah Y, Nockemann P, Oliferenko AA, Plechkova NV, Rafeen S, Rahman AA, Ramli R, Shariff SM, Seddon KR, Srinivasan G, Zou Y. An ionic liquid process for mercury removal from natural gas. Dalton Trans 2015; 44:8617-24. [DOI: 10.1039/c4dt03273j] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient ionic liquid based mercury scrubbing technology from gram to ton scale.
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Affiliation(s)
- Mahpuzah Abai
- PETRONAS Research Sdn. Bhd
- Selangor
- Malaysia
- QUILL
- The Queen's University of Belfast
| | | | | | | | - Yongcheun Kuah
- PETRONAS Research Sdn. Bhd
- Selangor
- Malaysia
- QUILL
- The Queen's University of Belfast
| | | | | | | | - Syamzari Rafeen
- PETRONAS Research Sdn. Bhd
- Selangor
- Malaysia
- QUILL
- The Queen's University of Belfast
| | | | - Rafin Ramli
- PETRONAS Research Sdn. Bhd
- Selangor
- Malaysia
- QUILL
- The Queen's University of Belfast
| | | | | | | | - Yiran Zou
- QUILL
- The Queen's University of Belfast
- Belfast
- UK
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Cheng G, Bai B, Zhang Q, Cai M. Hg⁰ removal from flue gas by ionic liquid/H₂O₂. JOURNAL OF HAZARDOUS MATERIALS 2014; 280:767-773. [PMID: 25240646 DOI: 10.1016/j.jhazmat.2014.09.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 09/03/2014] [Accepted: 09/04/2014] [Indexed: 06/03/2023]
Abstract
1-Alkyl-3-methylimidazolium chloride ionic liquids ([Cnmim] Cl, n=4, 6, 8) were prepared. The ionic liquid was then mixed with hydrogen peroxide (H2O2) to form an absorbent. The Hg(0) removal performance of the absorbent was investigated in a gas/liquid scrubber using simulated flue gas. It was found that the ionic liquid/H2O2 mixture was an excellent absorbent and could be used to remove Hg(0) from flue gas. When the mass ratio of H2O2 to ionic liquid was 0.5, the absorbent showed high Hg(0) removal efficiency (up to 98%). The Hg(0) removal efficiency usually increased with the absorption temperature, while decreased with the increase of alkyl chain length in ionic liquid molecule. The Hg(0) removal mechanism involved with Hg(0) oxidation by H2O2 and Hg(2+) transfer from aqueous phase to ionic liquid phase.
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Affiliation(s)
- Guangwen Cheng
- National Engineering Research Center of Clean Coal Combustion, Xi'an Thermal Power Research Institute Limited Company, Xi'an 710032, China; Xi'an Jiaotong University, Xi'an 710049, China.
| | - Bofeng Bai
- Xi'an Jiaotong University, Xi'an 710049, China
| | - Qiang Zhang
- National Engineering Research Center of Clean Coal Combustion, Xi'an Thermal Power Research Institute Limited Company, Xi'an 710032, China
| | - Ming Cai
- National Engineering Research Center of Clean Coal Combustion, Xi'an Thermal Power Research Institute Limited Company, Xi'an 710032, China
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