Controlling nitrogen oxide (NOx) emissions is a critical aspect of industrial environmental management. As industries evolve and face new operational demands, such as the need for deep load adjustment in power generation, traditional methods of NOx removal can become less effective. This scenario necessitates the exploration of alternative and advanced techniques, with hydrogen peroxide (H2O2) oxidation catalyzed by specialized materials presenting a highly promising solution. This approach offers a pathway to achieve efficient industrial emission control even under challenging conditions.

Hydrogen peroxide (H2O2) is a potent yet environmentally friendly oxidant. Its application in flue gas denitration, particularly through catalytic oxidation, harnesses its strong oxidizing potential to convert NOx into more manageable compounds. The key to unlocking the full potential of H2O2 lies in its catalytic decomposition, which generates reactive species like hydroxyl radicals (·OH). These radicals are highly effective in oxidizing NO and NO2, thereby facilitating their removal from flue gas streams. This process is a core element of achieving superior catalyst performance for NOx reduction.

The effectiveness of H2O2 oxidation is significantly amplified when combined with suitable catalysts. As highlighted in recent research, catalysts such as Fe-loaded Titanium Dioxide (Fe-TiO2) play a crucial role. These catalysts are designed to facilitate the decomposition of H2O2 at lower temperatures, a critical advantage when dealing with flue gases that may not reach the optimal operating temperatures for conventional systems like SCR. This makes catalytic H2O2 oxidation an ideal method for low-temperature flue gas NOx removal, directly addressing a major limitation of existing technologies.

Furthermore, this approach offers a solution for the issue of ammonium hydrogen sulfate formation, which can occur with traditional SCR systems when temperatures are too low. By employing H2O2 oxidation, industries can bypass this problem entirely, safeguarding catalyst longevity and maintaining efficient operation. The process is not only effective but also aims for optimal efficiency through careful control of operational parameters. Adjusting the H2O2/(SO2 + NO) molar ratio, for instance, is key to balancing reactant availability and preventing self-consumption reactions that can reduce efficiency.

Achieving high NOx removal rates, often exceeding 85%, while simultaneously ensuring near-complete SO2 removal, demonstrates the comprehensive pollutant control capabilities of this integrated method. The research also points to the importance of factors like liquid-to-gas ratio and the pH of the absorption solution in maximizing the overall performance of the denitration system. Fine-tuning these parameters ensures that the catalytic process operates at peak efficiency.

For industries seeking to enhance their environmental performance and meet increasingly stringent regulations, adopting H2O2 oxidation with advanced catalytic systems represents a forward-thinking strategy. It provides a robust and adaptable solution for managing NOx emissions, contributing to cleaner air and more sustainable industrial operations. NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to supporting these advancements through innovative chemical solutions.