[n]-Oligourea-Based Green Sorbents with Enhanced CO2 Sorption Capacity
AuthorsQaroush, Abdussalam K.
Castillo-Molina, Dante A.
Abu-Daabes, Malyuba A.
Alsyouri, Hatem M.
Abu-Surrah, Adnan S.
KAUST Grant NumberKSAC0069/UK-C0020
Permanent link to this recordhttp://hdl.handle.net/10754/672851
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AbstractA new series of [n]-oligoureas ([n]-OUs, n=4, 7, 10, and 12) green solid sorbents was prepared following a base-catalyzed, microwave-assisted oligomerization reaction. The materials were characterized by NMR and IR spectroscopy, elemental analysis, thermogravimetric analysis, differential scanning calorimetry, and XRD. Decomposition temperatures at 50 % weight loss (T<inf>d50</inf>) were ca. 350 °C for all oligomers. Urea and urethane functional groups indicated by IR spectroscopy confirmed the formation of the sorbent. The CO<inf>2</inf> capturing capacities were determined at 35 °C and 1.0 bar (gravimetric method). Accordingly, -OU had the highest CO<inf>2</inf> sorption capacity among the others (18.90 and 22.70 mg CO 2 g<inf>sorbent</inf><sup>-1</sup>) at two different activation temperatures (60 or 100 °C, respectively). Chemisorption was the principal mechanism for CO<inf>2</inf> capture. Cyclic CO<inf>2</inf> sorption/desorption measurements were carried out to test the recyclability of -OU. Activating the sample at 60 °C, three stable CO<inf>2</inf> sorption cycles were achieved after running the first cycle.
CitationQaroush, A. K., Castillo-Molina, D. A., Troll, C., Abu-Daabes, M. A., Alsyouri, H. M., Abu-Surrah, A. S., & Rieger, B. (2015). [n]-Oligourea-Based Green Sorbents with Enhanced CO2Sorption Capacity. ChemSusChem, 8(9), 1618–1626. doi:10.1002/cssc.201402828
SponsorsThe work presented here is a Part of a PhD thesis of A.K.Q. A.K.Q. is thankful to King Abdullah University for Science and Technology, KAUST for the financial support of the scholarship of his PhD (project: KSAC0069/UK-C0020). Deutsche Forschungs Gemeinschaft (DFG) is also thanked for partially supporting this work (project: RI 613/17-1). Thanks are also expressed to Mr. Abdel Jaber A. Alabdallah for providing us with the Table-of-Contents Figure. In addition, Mr. Maximilian W. Hahn is also thanked for his great help upon performing the HP-TGA experiments. Thanks are also to TUM Graduate School (TUM-GS) for their help in supporting this work.
PublisherWILEY-V C H VERLAG GMBH