Multiphase flows and multiphase reactors are commonly encountered in energy industry operations. Such operations include coal gasifiers, carbon capture processes, combustion chambers, oil refineries, oil drilling, pipe line transport, and Fischer-Tropsch synthesis. The inherently complex nature of multiphase flows requires a multi-dimensional measurement technique capable of providing real time monitoring of process dynamics and physical properties of the flow. Electrical Capacitance Volume Tomography (ECVT) through its real-time imaging, flexible sensor, non-invasive probes, suitability for up-scale applications, and affordable cost provides a solution in these regards. Moreover, the applicability of capacitance sensors in hot environments enables visualization of combustion processes, fuel burning, emissions control, and optimization of energy generation.