SSZ-13 molecular sieve is widely used in the selective catalytic reduction (SCR) of nitrogen oxides (NOx) in diesel engines. Its unique pore structure and high hydrothermal stability make it highly effective in converting harmful NOx emissions into nitrogen and water, even under harsh operating conditions. This application is critical for meeting stringent environmental regulations and reducing air pollution from vehicles and industrial processes. Additionally, SSZ-13 is employed in gas separation processes, particularly for separating small molecules like CO2 from gas mixtures, making it valuable in carbon capture and storage technologies. Its ability to adsorb specific gases also finds use in the purification of natural gas and other industrial gases. Furthermore, SSZ-13 plays a key role in the petrochemical industry as a catalyst in the methanol-to-olefins (MTO) process, which is essential for producing plastics and other chemicals.