Reactor design refers to the process of creating systems that facilitate controlled chemical reactions, often used in industries like pharmaceuticals, petrochemicals, and energy production. The design focuses on optimizing factors such as temperature, pressure, and mixing to enhance reaction efficiency and product yield. Different types of reactors, such as batch, continuous, and plug flow reactors, are chosen based on the specific requirements of the chemical process. Key considerations in reactor design include safety, scalability, and environmental impact. Engineers must also account for the materials used in construction, ensuring they can withstand the conditions inside the reactor. Advanced modeling techniques and simulations are often employed to predict reactor behavior and performance before actual implementation.