CO2 Capture using Graphite Waste Composites and Ceria

Abstract

Solid sorbents based on graphite electrode waste and cerium oxide (ceria, CeO2) have been studied with regard to CO2 capture. The acid-base properties of cerium oxide produce a sorbent for the capture of CO2. The aim of the study is to evaluate the performance of CO2 capture using graphite/CeO2 composites at different weights of Ce(NO3)3.6H2O (0.5, 1 and 2 g), namely G0.5, G1 and G2, respectively. Volumetric adsorption studies of CO2 on graphite/CeO2 composites and ceria were conducted at various pressures (P) of 3, 5, 8, 15 and 20 bar, and temperatures (T) of 303, 308, 318 K. Graphite waste before modification (GBM), activated graphite waste (GA), and CeO2 for capturing CO2 were also investigated. By varying the two parameters (P and T), we found that the maximum adsorption capacities of CO2 at 303 K and 20 bar were 0.0713, 0.0316, 0.1574, 0.0987, 0.1137, and 0.0964 kg/kg respectively, for GBM, GA, G0.5, G1, G2 and CeO2. The highest adsorption capacity of CO2 was found in the G0.5 composite. The adsorption performance of CO2 using ceria was almost similar to the G1 composite. We found that CO2 adsorption capacity decreases with an increasing temperature from 303 to 318 K. It was concluded that ceria and composite graphite waste/CeO2 are stable and selective CO2 sorbents. The work allows us to synthesize a new sorbent which can be effectively applied for CO2 capture. The adsorption capacity of CO2 depends significantly on the active site and chemical modifier of the sorbents.

Synthesis, Characterizations, and Adsorption Isotherms of CO2 on Chromium Terephthalate (MIL-101) Metal-organic Frameworks (Mofs)

“…The adsorption method, which is part of the carbon capture and storage (CCS) technology, is considered an efficient and economical method for replacing conventional technology in the CO2 scrubbing process, since the technology of amine solvents is deficient in corrosion and toxicity (Kartohardjono et al, 2017;Kusrini et al, 2018). Moreover, large amounts of energy are required to recycle amines, which diminishes the efficiency of energy usage, creates high costs in power plants, and produces corrosion in the pipeline (Ye et al, 2013;Mutyala et al, 2019).…”

Cotton Fiber and Carbon Materials Filters for Efficient Wastewater Purification

“…Sorption materials for wastewater treatment can be obtained from various production wastes. A vast variety of sorbents are produced from agricultural residues: sunflower husk, barley (Shaikhiev et al, 2010), wheat husk (Sobgaida et al, 2010), tea (Aslan et al, 2016), soybean and mustard (Humelnicu et al, 2015), leaf (Svyatchenko et al, 2020), peels (Kusrini et al, 2018), and others (Desmiarti et al, 2019;Olufemi and Eniodunm, 2018). The raw materials can be subjected to ultrasonic (Nasyrov et al, 2019) and heat treatment and exposed to acids and alkalis, thus obtaining materials with high sorptive properties at minimum costs (De Gisi et al, 2016).…”

Synthesis and Characterization of Graphite Oxide, Graphene Oxide and Reduced Graphene Oxide from Graphite Waste using Modified Hummers’s Method and Zinc as Reducing Agent

“…To present, the reutilization of electrode graphite waste has only been as filler in the production of steel. To improve the use and value of this graphite waste, investigations for synthesis and characterization of graphite waste as valuable products, such as adsorbents (Kusrini et al, 2017;Kusrini et al, 2018) have been reported.…”