In industrial processes such as petrochemicals and coal-based chemical production, sulfur recovery is a critical step for achieving environmental compliance and resource recycling. As the mainstream sulfur recovery technology, the Claus process relies heavily on catalyst performance to achieve high efficiency. Traditional alumina-based catalysts have limitations in organic sulfur hydrolysis, oxygen resistance, and sulfate formation resistance. In contrast, TiO₂-based sulfur recovery catalysts offer superior overall performance, making them an ideal alternative to imported catalysts and an effective solution for improving plant efficiency-A988 TiO₂ being a representative example.
Ⅰ. Core Processes and Role of Catalysts in Industrial Sulfur Recovery
Sulfur recovery units primarily treat feed gases containing H₂S, converting toxic and polluting sulfur compounds into elemental sulfur and water to meet environmental regulations. The two core reactions in sulfur recovery are the Claus reaction and organic sulfur hydrolysis, with catalyst activity directly determining total sulfur conversion rates and tail gas emission levels.
Ⅱ. Composition and Performance Characteristics of A988 TiO₂ Catalyst
The A988 TiO₂ sulfur recovery catalyst uses TiO₂ as its primary active component, combined with multiple patented additives. Compared to conventional catalysts, it demonstrates significantly higher activity in both organic sulfur hydrolysis and the Claus reaction between hydrogen sulfide and sulfur dioxide. Its conversion efficiency approaches thermodynamic equilibrium, substantially enhancing overall sulfur recovery efficiency.
Ⅲ. Stability Advantages of A988 TiO₂ Catalyst under Complex Operating Conditions
In real-world operations, occasional oxygen leakage in feed gases can lead to catalyst deactivation-a common issue with traditional catalysts. A key advantage of the A988 catalyst is that oxygen leakage does not impair its activity in either the Claus or hydrolysis reactions, ensuring long-term stable operation and preventing production interruptions caused by operational fluctuations.
Additionally, this catalyst exhibits excellent adaptability to high space velocities, maintaining high catalytic activity even under such conditions. This allows for reduced reactor volume, lowering capital and operating costs. In scenarios with significant load fluctuations, the A988 catalyst resists sulfate formation, effectively slowing down catalyst deactivation and offering a much longer service life than conventional alternatives.
Ⅳ. Industrial Applications and Loading Methods of A988 TiO₂ Catalyst
The A988 TiO₂ sulfur recovery catalyst is suitable for Claus sulfur recovery units in petrochemical and coal chemical industries. It can be loaded as a full bed in reactors or used in combination with other catalyst types: when placed in the first-stage reactor, it enhances COS and CS₂ hydrolysis rates; when used in second- or third-stage reactors, it further improves overall sulfur conversion.
Ⅴ. Industry Value of TiO₂ Catalysts
Overall, TiO₂-based sulfur recovery catalysts overcome the performance limitations of traditional catalysts, achieving international advanced standards in activity, stability, lifespan, and operational adaptability. They serve as essential materials for modern sulfur recovery units to improve quality and efficiency while meeting stringent environmental requirements, providing a reliable solution for domestic substitution in industrial applications.