Fig. 2. (a) Photograph of the 4 mm reactor filled with activated carbon (AC): (i) before use, and (ii) after use (flow rate of H2O: 0.1 mL min−1, microwave (E-field) input power: 15 W); (b) photograph of the AC in the single-mode applicator through the observation window for temperature measurement – note the red glow due to the microwave E-field heating.
