Title: Molecular‐Level Overhaul of γ‐Aminopropyl Aminosilicone/Triethylene Glycol Post‐Combustion CO ₂ ‐Capture Solvents

Abstract

Abstract Capturing carbon dioxide from post‐combustion gas streams is an energy‐intensive process that is required prior to either converting or sequestering CO ₂ . Although a few commercial 1st and 2nd generation aqueous amine technologies have been proposed, the cost of capturing CO ₂ with these technologies remains high. One approach to decrease costs of capture has been the development of water‐lean solvents that aim to increase efficiency by reducing the water content in solution. Water‐lean solvents, such as γ‐aminopropyl aminosilicone/triethylene glycol (GAP/TEG), are promising technologies, with the potential to halve the parasitic load to a coal‐fired power plant, albeit only if high solution viscosities and hydrolysis of the siloxane moieties can be mitigated. This study concerns an integrated multidisciplinary approach to overhaul the GAP/TEG solvent system at the molecular level to mitigate hydrolysis while also reducing viscosity. Cosolvents and diluents are found to have negligible effects on viscosity and are not needed. This finding allows for the design of single‐component siloxane‐free diamine derivatives with site‐specific incorporation of selective chemical moieties for direct placement and orientation of hydrogen bonding to reduce viscosity. Ultimately, these new formulations are less susceptible to hydrolysis and exhibit up to a 98 % reduction in viscosity comparedmore » to the initial GAP/TEG formulation.« less

Authors:

Cantu, David C.  ^[1];

• Search DOE PAGES for author "Cantu, David C."
• Search DOE PAGES for ORCID "0000-0001-9584-5062"

Malhotra, Deepika  ^[2];

• Search DOE PAGES for author "Malhotra, Deepika"
• Search DOE PAGES for ORCID "0000-0002-0796-6508"

Nguyen, Manh‐Thuong ^[3]; Koech, Phillip K.  ^[2];

• Search DOE PAGES for author "Koech, Phillip K."
• Search DOE PAGES for ORCID "0000-0003-2996-0593"

Zhang, Difan ^[3]; Glezakou, Vassiliki‐Alexandra ^[3]; Rousseau, Roger ^[3]; Page, Jordan ^[2]; Zheng, Richard ^[2]; Perry, Robert J.  ^[4];

• Search DOE PAGES for author "Perry, Robert J."
• Search DOE PAGES for ORCID "0000-0003-2027-4829"

Heldebrant, David J.  ^[5]

• Search DOE PAGES for author "Heldebrant, David J."
• Search DOE PAGES for ORCID "0000-0002-5529-526X"

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+ Show Author Affiliations

1. Physical Sciences Division Pacific Northwest National Laboratory Richland WA 99352 USA, Present Address: Chemical and Materials Engineering Department University of Nevada Reno NV 89557 USA
2. Energy Processes and Materials Division Pacific Northwest National Laboratory Richland WA 99352 USA
3. Physical Sciences Division Pacific Northwest National Laboratory Richland WA 99352 USA
4. GE Global Research 1 Research Circle Niskayuna NY 12309 USA
5. Energy Processes and Materials Division Pacific Northwest National Laboratory Richland WA 99352 USA, Washington State University Department of Chemical Engineering Pullman WA 99164 USA

Publication Date:

Fri Jun 05 00:00:00 EDT 2020

Sponsoring Org.:

USDOE

OSTI Identifier:

1632036

Resource Type:

Publisher's Accepted Manuscript

Journal Name:

ChemSusChem

Additional Journal Information:

Journal Name: ChemSusChem Journal Volume: 13 Journal Issue: 13; Journal ID: ISSN 1864-5631

Publisher:

Wiley Blackwell (John Wiley & Sons)

Country of Publication:

Germany

Language:

English