Development of cellulose-based composite adsorbents for CO 2 capture Marcellin Premila Jerome 1,2 , Suresh Kumar Reddy 1,2 , Georgios Karanikolos 1,2 , Nahla Alamoodi 1,2,* 1 Department of Chemical Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates 2 Center for Catalysis and Separation (CeCaS), Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates, *Corresponding Author One of the major environmental concerns at present is the increase of carbon dioxide (CO 2 ) levels due to anthropogenic activities arising from agriculture, transportation, and industries such as cement, petrochemical, iron, and steel [1] . On the other hand, the accumulation of waste paper in landfills is a growing issue that needs to be addressed. Several CO 2 reduction technologies are currently being investigated to offset the negative impact caused due to CO 2 . Among them, the most prominent technology has been Carbon Capture, Utilization, and Storage (CCUS). Currently, absorption is the most common method used to capture CO 2 but it has various limitations as a result this research aims at exploring the use of adsorption in capturing CO 2 . Office paper which mostly comprises 85% cellulose is extracted using simple chemicals and is studied in this work [2] . Cellulose is the most abundant biopolymer in the world which is inexpensive, non-toxic, and can be easily functionalized with CO 2 -philic functionalities due to the presence of abundant hydroxyl groups [3] . To further enhance the CO 2 uptake of cellulose-based materials, composites were synthesized, and the material chosen is graphene oxide (GO) which is a 2D material comprising hydroxyl, alkoxy, carbonyl, and carboxyl functional groups [4] . The synthesized cellulose-GO aerogels were evaluated for CO 2 adsorption as a function of temperature and relative pressure. Furthermore, the cellulose-GO aerogels were functionalized with an amino silane called 3-aminopropyltriethoxysilane (APTES) to study the effect of introducing a CO 2 -philic group in adsorbing CO 2 at different temperatures and relative pressure. References 1. Ritchie, H., M. Roser, and P. Rosado, CO₂ and Greenhouse Gas Emissions . 2020, Our World in Data. Yuan, X., et al., Effect of pretreatment by a microbial consortium on methane production of waste paper and cardboard. Bioresource Technology, 2012. 118 : p. 281-288. 2. Seddiqi, H., et al., Cellulose and its derivatives: towards biomedical applications. Cellulose, 2021. 28 (4): p. 1893-1931. 3. Varghese, A.M., et al., Performance enhancement of CO 2 capture adsorbents by UV treatment: The case of self-supported graphene oxide foam. Chemical Engineering Journal, 2020. 386 : p. 124022.
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