Desulfurization processes are methods used to remove sulfur compounds from fuels and emissions. These processes are essential for reducing air pollution and meeting environmental regulations. Common techniques include flue gas desulfurization (FGD), which removes sulfur dioxide (SO2) from exhaust gases, and hydrodesulfurization (HDS), which treats petroleum products to lower sulfur content. In industrial applications, desulfurization helps improve the quality of fuels, making them cleaner and more efficient. By minimizing sulfur emissions, these processes contribute to better air quality and help combat issues like acid rain, which can harm ecosystems and infrastructure.