This course aims to educate students on the fundamental principles of chemical separation technologies essential to energy and environment-related applications that enable to achieve sustainable development. The course will include both equilibrium-controlled separation processes and separation processes that involve both mass transport and equilibrium considerations. The students will learn the basic concepts in molecular separation (especially for mixtures of gases and vapours) and how separation processes work as well as develop ability to use the basic knowledge learned to provide solutions to timely important separation problems in the field of energy and environment.