Can you give me some seminar topic related to chemical engineering?

Practical Uses of Chemical Engineering in D.O.D. Projects
Process design
Chemical Engineering and the Automotive Sector
etc, etc, etc....

You could also approach chemical engineering through big philosophical ideas, such as: How did chemicals differentiate from primordial space? How does nature engineer things? Should humans engineer chemicals that could become weapons? Is biomimicry better than human engineering, etc.