SO2 dry-based catalytic removal from flue gas leading to elemental sulfur production: A comprehensive review

• Published in: Process safety and environmental protection Vol. 182; pp. 456 - 480
• Main Authors: Sepehrian, Mohammad, Anbia, Mansoor, Hedayatzadeh, Mohammad Hossein, Yazdi, Fatemeh
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2024
• Subjects: Catalytic reduction; Elemental sulfur production; Environmental protection; Mechanisms of reduction; Sulfur dioxide; Catalytic reduction; Sulfur dioxide; Elemental sulfur production; Mechanisms of reduction; Environmental protection
• ISSN: 0957-5820; 1744-3598
• DOI: 10.1016/j.psep.2023.11.077

Rapid industrialization and societal advancements have resulted in significant gaseous pollutants emissions, particularly sulfur dioxide (SO2). This notorious pollutant poses a threat to ecosystems, contributes to acidic rain formation, and leads to the corrosion of equipment and infrastructure. To address these concerns, the catalytic conversion of sulfur dioxide to elemental sulfur, a benign and valuable product, has gained considerable attention. Despite numerous studies on this method, a lack of comprehensive knowledge regarding its benefits and drawbacks has hindered its widespread adoption and implementation. In this comprehensive review, we present a detailed analysis of the subject, encompassing various reductants employed, reduction mechanisms, catalyst types, methods for catalyst improvement, diverse operational conditions, lesser-explored aspects, and potential solutions for enhancing this technique. It is expected that examining the recent developments and fundamental evolutions that have taken place in this field leads to a full understanding of this technique and open the way for its development and implementation in the industry. [Display omitted]