In the recently introduced method of production of graphene from graphite powder in a mixture of nitric and sulfuric acids under microwave irradiation, the problem of control over reaction temperature (and thus over the quality of graphene sheets) remains unresolved. This paper focuses on physical aspects of the production process, considers its implementation in the MiniFlow 200SS microwave system, and models certain regimes of interactions of microwaves in this system with some components of the reactant. Simulations show a very high heating rate for graphite powder, extreme temperature non-uniformity, a strong need for data about formation of new chemical bonds, and the necessity to account for convection flows.
Holmes, A. O., Yang, C., Patel, M., Savaram, K., He, H., & Yakovlev, V. V. (2013). Microwave-Enabled Production ofSolution-Processable Graphene: Principlesand Techniques of Macroscopic Modeling. 14th International Conference on Microwave and High Frequency Heating.
*denotes a WPI undergraduate student author