Despite the availability of various methods and catalysts, there are several challenges associated with the catalytic removal of SOx:
1. Catalyst Deactivation: Over time, catalysts can become poisoned or fouled by SOx and other pollutants, leading to reduced efficiency and the need for frequent replacement or regeneration.
2. Cost: The development and implementation of effective catalytic systems can be expensive, particularly for large-scale industrial applications.
3. Selectivity: Achieving high selectivity for the desired reaction while minimizing side reactions and by-products is a constant challenge.
