A chemical reactor is a vessel or container where chemical reactions take place. It is designed to provide the right conditions, such as temperature and pressure, to facilitate these reactions. Reactors can vary in size and complexity, from small laboratory setups to large industrial units, and are essential in producing chemicals, pharmaceuticals, and fuels. In a chemical reactor, reactants are mixed and transformed into products through various processes. Different types of reactors, such as batch reactors, continuous reactors, and plug flow reactors, are used depending on the specific requirements of the reaction and the desired output. Proper design and operation of reactors are crucial for efficiency and safety.