Abstract
A prototype superheated steam generator was developed and simple activation tests were conducted. High-temperature superheated steam at 1000 °C could be generated by sending low temperature (100 °C) saturated steam from the bottom of a silica tube filled with silicon carbide heater elements heated by microwave irradiation. The temperature of the superheated steam could be precisely controlled by adjusting the microwave output power for heating the SiC heater elements. Activation of cotton by microwave-assisted superheated steam treatment at 650 °C for 10 min was found to be effective to achieve a specific surface area of ca. 670 m2/g, which is higher than that obtained by the conventional method.
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