A Diaminopropane-Appended Metal–Organic Framework Enabling Efficient CO2 Capture from Coal Flue Gas via a Mixed Adsorption Mechanism
Journal Article
·
· Journal of the American Chemical Society
- Univ. of California, Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States). Berkeley Energy and Climate Inst. (BECI)
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Here, a new diamine-functionalized metal-organic framework comprised of 2,2-dimethyl-1,3-diaminopropane (dmpn) appended to the Mg2+ sites lining the channels of Mg2(dobpdc) (dobpdc4-= 4,4'-dioxidobiphenyl-3,3'-dicarboxylate) is characterized for the removal of CO2 from the flue gas emissions of coal-fired power plants. Unique to members of this promising class of adsorbents, dmpn-Mg2(dobpdc) displays facile step-shaped adsorption of CO2 from coal flue gas at 40 °C and near complete CO2 desorption upon heating to 100 °C, enabling a high CO2 working capacity (2.42 mmol/g, 9.1 wt %) with a modest 60 °C temperature swing. Evaluation of the thermodynamic parameters of adsorption for dmpn-Mg2(dobpdc) suggests that the narrow temperature swing of its CO2 adsorption steps is due to the high magnitude of its differential enthalpy of adsorption (Δhads= -73 ± 1 kJ/mol), with a larger than expected entropic penalty for CO2 adsorption (Δsads= -204 ± 4 J/mol·K) positioning the step in the optimal range for carbon capture from coal flue gas. In addition, thermogravimetric analysis and breakthrough experiments indicate that, in contrast to many adsorbents, dmpn-Mg2(dobpdc) captures CO2 effectively in the presence of water and can be subjected to 1000 humid adsorption/desorption cycles with minimal degradation. Solid-state 13C NMR spectra and single-crystal X-ray diffraction structures of the Zn analogue reveal that this material adsorbs CO2 via formation of both ammonium carbamates and carbamic acid pairs, the latter of which are crystallographically verified for the first time in a porous material. Taken together, these properties render dmpn-Mg2(dobpdc) one of the most promising adsorbents for carbon capture applications.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- Exxonmobil Research and Engineering Company (EMRE); National Inst. of Health (NIH); Philomathia Foundation; USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231; AC02-06CH11357; SC0001015
- OSTI ID:
- 1464144
- Alternate ID(s):
- OSTI ID: 1406619
- Journal Information:
- Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 38 Vol. 139; ISSN 0002-7863
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cooperative adsorption of carbon disulfide in diamine-appended metal–organic frameworks
|
journal | December 2018 |
Similar Records
A Diaminopropane-Appended Metal–Organic Framework Enabling Efficient CO 2 Capture from Coal Flue Gas via a Mixed Adsorption Mechanism
Elucidating CO2 Chemisorption in Diamine-Appended Metal–Organic Frameworks
Isotherm, Kinetic, Process Modeling, and Techno-Economic Analysis of a Diamine-Appended Metal-Organic Framework for CO2 Capture Using Fixed Bed Contactors
Journal Article
·
Thu Sep 14 00:00:00 EDT 2017
· Journal of the American Chemical Society
·
OSTI ID:1406619
Elucidating CO2 Chemisorption in Diamine-Appended Metal–Organic Frameworks
Journal Article
·
Sat Dec 01 19:00:00 EST 2018
· Journal of the American Chemical Society
·
OSTI ID:1542346
Isotherm, Kinetic, Process Modeling, and Techno-Economic Analysis of a Diamine-Appended Metal-Organic Framework for CO2 Capture Using Fixed Bed Contactors
Journal Article
·
Tue Mar 23 20:00:00 EDT 2021
· Energy and Fuels
·
OSTI ID:1843001