Facile synthesis of Persian gum-graphene oxide composite as a novel adsorbent for CO2 capture: characterization and optimization

Maryam Helmi; Zahra Khoshdouni Farahani; Alireza Hemmati; Ahad Ghaemi

doi:10.1038/s41598-024-56070-w

Facile synthesis of Persian gum-graphene oxide composite as a novel adsorbent for CO₂ capture: characterization and optimization

Sci Rep. 2024 Mar 6;14(1):5511. doi: 10.1038/s41598-024-56070-w.

Authors

Maryam Helmi¹, Zahra Khoshdouni Farahani², Alireza Hemmati¹, Ahad Ghaemi³

Affiliations

¹ School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Tehran, Iran.
² Department of Food Science and Technology, Faculty of Agriculture and Food Industry, Science and Research Branch, Islamic Azad University, Tehran, Iran.
³ School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Tehran, Iran. aghaemi@iust.ac.ir.

PMID: 38448644
DOI: 10.1038/s41598-024-56070-w

Abstract

Burning fossil fuels releases toxic gases into the environment and has negative effects on it. In this study, Persian gum@Graphene oxide (Pg@GO) was synthesized and used as a novel adsorbent for CO₂ capture. The characterization of materials was determined through XRD, FTIR, FE-SEM, and TGA analysis. The operating parameters including temperature, Pressure, and adsorbent weight were studied and optimized by response surface methodology via Box-Behnken design (RSM-BBD). The highest amount of CO₂ adsorption capacity was 4.80 mmol/g, achieved at 300 K and 7.8 bar and 0.4 g of adsorbent weight. To identify the behavior and performance of the Pg@GO, various isotherm and kinetic models were used to fit with the highest correlation coefficient (R²) amounts of 0.955 and 0.986, respectively. The results proved that the adsorption of CO₂ molecules on the adsorbent surface is heterogeneous. Based on thermodynamic results, as the value of ΔG° is - 8.169 at 300 K, the CO₂ adsorption process is exothermic, and spontaneous.

Keywords: Adsorption; CO2; Persian gum; Response surface methodology; Thermodynamic.