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Open AccessArticle

Valorization of Raw and Calcined Chicken Eggshell for Sulfur Dioxide and Hydrogen Sulfide Removal at Low Temperature

1
Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, Kampar 31900, Perak, Malaysia
2
Chemical and Materials Engineering Department, Faculty of Engineering Rabigh, King Abdulaziz University, P.O. Box 344, Rabigh 21911, Saudi Arabia
*
Author to whom correspondence should be addressed.
Academic Editor: Daniela Barba
Catalysts 2021, 11(2), 295; https://doi.org/10.3390/catal11020295
Received: 18 January 2021 / Revised: 19 February 2021 / Accepted: 19 February 2021 / Published: 23 February 2021
(This article belongs to the Special Issue Catalysts and Processes for H2S Conversion to Sulfur)
Chicken eggshell (ES) is a waste from the food industry with a high calcium content produced in substantial quantity with very limited recycling. In this study, eco-friendly sorbents from raw ES and calcined ES were tested for sulfur dioxide (SO2) and hydrogen sulfide (H2S) removal. The raw ES was tested for SO2 and H2S adsorption at different particle size, with and without the ES membrane layer. Raw ES was then subjected to calcination at different temperatures (800 °C to 1100 °C) to produce calcium oxide. The effect of relative humidity and reaction temperature of the gases was also tested for raw and calcined ES. Characterization of the raw, calcinated and spent sorbents confirmed that calcined eggshell CES (900 °C) showed the best adsorption capacity for both SO2 (3.53 mg/g) and H2S (2.62 mg/g) gas. Moreover, in the presence of 40% of relative humidity in the inlet gas, the adsorption capacity of SO2 and H2S gases improved greatly to about 11.68 mg/g and 7.96 mg/g respectively. Characterization of the raw and spent sorbents confirmed that chemisorption plays an important role in the adsorption process for both pollutants. The results indicated that CES can be used as an alternative sorbent for SO2 and H2S removal. View Full-Text
Keywords: chicken eggshell; waste valorization; adsorption; biogas; flue gas chicken eggshell; waste valorization; adsorption; biogas; flue gas
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MDPI and ACS Style

Ahmad, W.; Sethupathi, S.; Munusamy, Y.; Kanthasamy, R. Valorization of Raw and Calcined Chicken Eggshell for Sulfur Dioxide and Hydrogen Sulfide Removal at Low Temperature. Catalysts 2021, 11, 295. https://doi.org/10.3390/catal11020295

AMA Style

Ahmad W, Sethupathi S, Munusamy Y, Kanthasamy R. Valorization of Raw and Calcined Chicken Eggshell for Sulfur Dioxide and Hydrogen Sulfide Removal at Low Temperature. Catalysts. 2021; 11(2):295. https://doi.org/10.3390/catal11020295

Chicago/Turabian Style

Ahmad, Waseem; Sethupathi, Sumathi; Munusamy, Yamuna; Kanthasamy, Ramesh. 2021. "Valorization of Raw and Calcined Chicken Eggshell for Sulfur Dioxide and Hydrogen Sulfide Removal at Low Temperature" Catalysts 11, no. 2: 295. https://doi.org/10.3390/catal11020295

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