Step One: Generation of Sulfur Dioxide Gas (SO2) Sulfur dioxide gas is formed when sulfur obtained from various sources is burned. This step requires ensuring that the air supplied to the combustion process is dry. When burning sulfur, the ratio of air to sulfur must be controlled to ensure that high-purity sulfur dioxide is produced.
Step 2: Catalytic oxidation of sulfur dioxide to generate sulfur trioxide (SO3). Under the action of a catalyst (usually vanadium pentoxide), sulfur dioxide reacts with oxygen to generate sulfur trioxide. The temperature and pressure of this step need to be strictly controlled to optimize the yield of sulfur trioxide.
Step 3: Sulfur trioxide combines with water to form sulfuric acid (H2SO4). When sulfur trioxide combines with water, sulfuric acid is formed. This process releases a large amount of heat, so measures need to be taken to control the reaction temperature to prevent equipment damage.
Sulfuric acid is widely used in chemical fertilizers, petroleum refining, wastewater treatment, chemical synthesis and other fields, and is an indispensable part of modern industry4. As technology advances, sulfuric acid production is becoming more efficient and environmentally friendly to meet the growing global demand for this important chemical.
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