Title: Flying MOFs: polyamine-containing fluidized MOF/SiO ₂ hybrid materials for CO ₂ capture from post-combustion flue gas

Abstract

Solid-state synthesis ensures a high loading and well-dispersed growth of a large collection of metal–organic framework (MOF) nanostructures within a series of commercially available mesoporous silica. This approach provides a general, highly efficient, scalable, environmentally friendly, and inexpensive strategy for shaping MOFs into a fluidized form, thereby allowing their application in fluidized-bed reactors for diverse applications, such as CO₂ capture from post-combustion flue gas. A collection of polyamine-impregnated MOF/SiO₂ hybrid sorbents were evaluated for CO₂ capture under simulated flue gas conditions in a packed-bed reactor. Hybrid sorbents containing a moderate loading of (Zn)ZIF-8 are the most promising sorbents in terms of CO₂ adsorption capacity and long-term stability (up to 250 cycles in the presence of contaminants: SO₂, NO_x and H₂S) and were successfully prepared at the kilogram scale. These hybrid sorbents demonstrated excellent fluidizability and performance under the relevant process conditions in a visual fluidized-bed reactor. Moreover, a biochemically inspired strategy for covalently linking polyamines to MOF/SiO₂ through strong phosphine bonds has been first introduced in this work as a powerful and highly versatile post-synthesis modification for MOF chemistry, thus providing a novel alternative towards more stable CO₂ solid sorbents.

Authors:

Luz, Ignacio  ^[1];

• Search DOE PAGES for author "Luz, Ignacio"
• Search DOE PAGES for ORCID "0000-0002-5020-9211"

Soukri, Mustapha  ^[1];

• Search DOE PAGES for author "Soukri, Mustapha"
• Search DOE PAGES for ORCID "0000-0002-8512-8067"

Lail, Marty  ^[1]

• Search DOE PAGES for author "Lail, Marty"
• Search DOE PAGES for ORCID "0000-0003-2662-4236"

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+ Show Author Affiliations

1. RTI International, USA

Publication Date:

Mon Jan 01 00:00:00 EST 2018

Research Org.:

RTI International, Research Triangle Park, NC (United States)

Sponsoring Org.:

USDOE Office of Fossil Energy (FE)

OSTI Identifier:

1433740

Alternate Identifier(s):

OSTI ID: 1505502

Grant/Contract Number:  

FE0026432

Resource Type:

Published Article

Journal Name:

Chemical Science

Additional Journal Information:

Journal Name: Chemical Science Journal Volume: 9 Journal Issue: 20; Journal ID: ISSN 2041-6520

Publisher:

Royal Society of Chemistry (RSC)

Country of Publication:

United Kingdom

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY