Effect of Molecular Structure on the CO2 Separation Properties of Hydrophobic Solvents Consisting of Grafted Poly Ethylene Glycol and Poly Dimethylsiloxane Units

Thompson, Robert L.; Culp, Jeff; Tiwari, Surya P.; Basha, Omar; Shi, Wei; Damodaran, Krishnan; Resnik, Kevin; Siefert, Nick; Hopkinson, David

doi:10.1021/acs.energyfuels.9b00500

Effect of Molecular Structure on the CO₂ Separation Properties of Hydrophobic Solvents Consisting of Grafted Poly Ethylene Glycol and Poly Dimethylsiloxane Units

Journal Article · Thu Apr 11 00:00:00 EDT 2019 · Energy and Fuels

DOI:https://doi.org/10.1021/acs.energyfuels.9b00500· OSTI ID:1573899

^[1]; Culp, Jeff ^[1]; Tiwari, Surya P. ^[1]; ^[2]; ^[1]; Damodaran, Krishnan ^[3]; Resnik, Kevin ^[1]; Siefert, Nick ^[1]; Hopkinson, David ^[1]

National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)
Univ. of Pittsburgh, Pittsburgh, PA (United States). Dept. of Chemical Engineering
Univ. of Pittsburgh, Pittsburgh, PA (United States). Dept. of Chemistry, Chevron Science Center

This work describes the preparation of a set of nine new novel hydrophobic PEG-substituted solvents. These solvents include linear, T-shaped, and disubstituted conformations of the PEG grafted with PDMS molecule. The effect of changing both the molecular conformation and length of PEG side arm on the physical properties and CO₂ absorption capacity was studied. These solvents are intended for separation of CO₂ and H₂ in precombustion CO₂ capture and are intended to replace the current-state-of-the-art glycol-based solvents and operate at a higher temperature. In conclusion, the properties of the disubstituted solvents are exceptionally well suited for precombustion CO₂ capture applications because of their hydrophobicity, high CO₂ solubility, low evaporation rate, and lack of foaming.

View Accepted Manuscript (DOE)

Research Organization:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE)

OSTI ID:: 1573899

Journal Information:: Energy and Fuels, Journal Name: Energy and Fuels Journal Issue: 5 Vol. 33; ISSN 0887-0624

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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