A Highly Stable Microporous Covalent Imine Network Adsorbent for Natural Gas Upgrading and Flue Gas CO2 Capture

Handle URI:
http://hdl.handle.net/10754/612999
Title:
A Highly Stable Microporous Covalent Imine Network Adsorbent for Natural Gas Upgrading and Flue Gas CO2 Capture
Authors:
Das, Swapan Kumar ( 0000-0002-9504-801X ) ; Wang, Xinbo; Ostwal, Mayur; Lai, Zhiping ( 0000-0001-9555-6009 )
Abstract:
The feasible capture and separation of CO2 and N2 from CH4 is an important task for natural gas upgrading and the control of greenhouse gas emissions. Here, we studied the microporous covalent imine networks (CIN) material prepared through Schiff base condensation and exhibited superior chemical robustness under both acidic and basic conditions and high thermal stability. The material possesses a relatively uniform nanoparticle size of approximately 70 to 100 nm. This network featured permanent porosity with a high surface area (722 m2g-1) and micropores. A single-component gas adsorption study showed enhanced CO2 and CH4 uptakes of 3.32 mmol/g and 1.14 mmol/g, respectively, at 273 K and 1 bar, coupled with high separation selectivities for CO2/CH4, CH4/N2, and CO2/N2 of 23, 11.8 and 211, respectively. The enriched Lewis basicity in the porous skeletons favours the interaction of quadrupolar CO2 and polarizable CH4, resulting in enhanced CH4 and CO2 uptake and high CH4/N2, CO2/CH4 and CO2/N2 selectivities. Breakthrough experiments showed high CO2/CH4, CH4/N2 and CO2/N2 selectivities of 7.29, 40 and 125, respectively, at 298 K and 1 bar. High heats of adsorption for CH4 and CO2 (QstCH4; 32.61 kJ mol-1 and QstCO2; 42.42 kJ mol-1) provide the ultimate validation for the high selectivity. To the best of our knowledge, such a versatile adsorbent material that displays both enhanced uptake and selectivity for a variety of binary gas mixtures, including CO2/ CH4, CO2/N2 and CH4/N2, has not been extensively explored.
KAUST Department:
Advanced Membranes and Porous Materials Center (AMPMC); Physical Sciences and Engineering (PSE) Division
Citation:
A Highly Stable Microporous Covalent Imine Network Adsorbent for Natural Gas Upgrading and Flue Gas CO2 Capture 2016 Separation and Purification Technology
Publisher:
Elsevier BV
Journal:
Separation and Purification Technology
Issue Date:
6-Jun-2016
DOI:
10.1016/j.seppur.2016.06.016
Type:
Article
ISSN:
13835866
Sponsors:
We gratefully acknowledge financial support from the King Abdullah University of Science and Technology (KAUST), competitive research grant URF/1/1378.
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S1383586616306451
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorDas, Swapan Kumaren
dc.contributor.authorWang, Xinboen
dc.contributor.authorOstwal, Mayuren
dc.contributor.authorLai, Zhipingen
dc.date.accessioned2016-06-14T08:18:00Z-
dc.date.available2016-06-14T08:18:00Z-
dc.date.issued2016-06-06-
dc.identifier.citationA Highly Stable Microporous Covalent Imine Network Adsorbent for Natural Gas Upgrading and Flue Gas CO2 Capture 2016 Separation and Purification Technologyen
dc.identifier.issn13835866-
dc.identifier.doi10.1016/j.seppur.2016.06.016-
dc.identifier.urihttp://hdl.handle.net/10754/612999-
dc.description.abstractThe feasible capture and separation of CO2 and N2 from CH4 is an important task for natural gas upgrading and the control of greenhouse gas emissions. Here, we studied the microporous covalent imine networks (CIN) material prepared through Schiff base condensation and exhibited superior chemical robustness under both acidic and basic conditions and high thermal stability. The material possesses a relatively uniform nanoparticle size of approximately 70 to 100 nm. This network featured permanent porosity with a high surface area (722 m2g-1) and micropores. A single-component gas adsorption study showed enhanced CO2 and CH4 uptakes of 3.32 mmol/g and 1.14 mmol/g, respectively, at 273 K and 1 bar, coupled with high separation selectivities for CO2/CH4, CH4/N2, and CO2/N2 of 23, 11.8 and 211, respectively. The enriched Lewis basicity in the porous skeletons favours the interaction of quadrupolar CO2 and polarizable CH4, resulting in enhanced CH4 and CO2 uptake and high CH4/N2, CO2/CH4 and CO2/N2 selectivities. Breakthrough experiments showed high CO2/CH4, CH4/N2 and CO2/N2 selectivities of 7.29, 40 and 125, respectively, at 298 K and 1 bar. High heats of adsorption for CH4 and CO2 (QstCH4; 32.61 kJ mol-1 and QstCO2; 42.42 kJ mol-1) provide the ultimate validation for the high selectivity. To the best of our knowledge, such a versatile adsorbent material that displays both enhanced uptake and selectivity for a variety of binary gas mixtures, including CO2/ CH4, CO2/N2 and CH4/N2, has not been extensively explored.en
dc.description.sponsorshipWe gratefully acknowledge financial support from the King Abdullah University of Science and Technology (KAUST), competitive research grant URF/1/1378.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S1383586616306451en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Separation and Purification Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Separation and Purification Technology, 6 June 2016. DOI: 10.1016/j.seppur.2016.06.016en
dc.subjectCO2 captureen
dc.subjectNatural gasen
dc.subjectGreenhouse gasen
dc.subjectAdsorptionen
dc.subjectPorous organic polymeren
dc.subjectMethane nitrogen separationen
dc.titleA Highly Stable Microporous Covalent Imine Network Adsorbent for Natural Gas Upgrading and Flue Gas CO2 Captureen
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Center (AMPMC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalSeparation and Purification Technologyen
dc.eprint.versionPost-printen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorDas, Swapan Kumaren
kaust.authorWang, Xinboen
kaust.authorOstwal, Mayuren
kaust.authorLai, Zhipingen
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