Reduction of SO2 to Elemental Sulfur in Flue Gas Using Copper-Alumina Catalysts

Autor: Seyyed Ebrahim Mousavi, Hassan Pahlavanzadeh, Reza Khalighi, Masoud Khani, Habib Ale Ebrahim, Saeed Abbasizadeh, Abbas Mozaffari
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Journal of Nanotechnology, Vol 2023 (2023)
Druh dokumentu: article
ISSN: 1687-9511
DOI: 10.1155/2023/3723612
Popis: This study aims to propose an advanced catalyst for the selective catalytic reduction of SO2, as a sustainable process to mitigate the emission of this toxic gas, which is a significant environmental concern. The conversion of SO2 through catalytic reduction with CH4 to elemental sulfur was investigated using Al2O3-Cu catalysts. The reaction was conducted under atmospheric pressure and at a temperature range of 550–800°C. A remarkable 99.9% SO2 conversion rate and 99.5% sulfur selectivity were achieved using the Al2O3-Cu (10%) catalyst at 750°C. The highest conversion rates of SO2 to elemental sulfur, with minimal production of undesirable by-products such as H2S and COS, were obtained when the SO2/CH4 molar feed ratio was set at 2, which is the stoichiometric ratio. Furthermore, the optimal catalyst exhibited excellent long-term stability for SO2 reduction with methane.
Databáze: Directory of Open Access Journals