title: Formulation of Aminosilica Adsorbents into 3D-Printed Monoliths and Evaluation of Their CO2Capture Performance.
abstract: Amine-based materials have represented themselves as a promising class of CO2adsorbents; however, their large-scale implementation requires their formulation into suitable structures. In this study, we report formulation of aminosilica adsorbents into monolithic structures through a three-dimensional (3D) printing technique. In particular, 3D-printed monoliths were fabricated using presynthesized silica-supported tetraethylenepentamine (TEPA) and poly(ethylenimine) (PEI) adsorbents using three different approaches. In addition, a 3D-printed bare silica monolith was prepared and post-functionalized with 3-aminopropyltrimethoxysilane (APS). Characterization of the obtained monoliths indicated that aminosilica materials retained their characteristics after being extruded into 3D-printed configurations. Adsorptive performance of amine-based structured adsorbents was also investigated in CO2capture. Our results indicated that aminosilica materials retain their structural, physical, and chemical properties in the monoliths. In addition, the aminosilica monoliths exhibited adsorptive characteristics comparable to their corresponding powders. This work highlights the importance of adsorbent materials formulations into practical contactors such as monoliths, as the scalabale technology platform, that could facilitate rapid deployment of adsorption-based CO2capture processes on commercial scales.
authors.affiliation: Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology , 1401 N Pine Street, Rolla, Missouri 65409, United States.
authors.forename: Harshul
authors.initials: H
authors.lastname: Thakkar
authors.affiliation: Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology , 1401 N Pine Street, Rolla, Missouri 65409, United States.
authors.forename: Stephen
authors.initials: S
authors.lastname: Eastman
authors.affiliation: Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology , 1401 N Pine Street, Rolla, Missouri 65409, United States.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Al-Mamoori
authors.affiliation: Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology , 1401 N Pine Street, Rolla, Missouri 65409, United States.
authors.forename: Amit
authors.initials: A
authors.lastname: Hajari
authors.affiliation: Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology , 1401 N Pine Street, Rolla, Missouri 65409, United States.
authors.forename: Ali A
authors.initials: AA
authors.lastname: Rownaghi
authors.affiliation: Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology , 1401 N Pine Street, Rolla, Missouri 65409, United States.
authors.forename: Fateme
authors.identifier: http://orcid.org/0000-0002-4214-4235
authors.initials: F
authors.lastname: Rezaei
keywords: 3D printing technique; CO2 capture; aminosilica adsorbents; functionalization; monoliths