Innovative design and experimental research on the world's first pilot plant for continuous supercritical hydrothermal synthesis nano copper

Supercritical hydrothermal synthesis (SCHS) is a promising nanomaterial preparation technology. We have successfully constructed the world's first continuous supercritical hydrothermal synthesis of nano copper pilot plant, with a yield of 100 kg/d and a grain size of nano copper products between 48–90 nm. In this work, the progressiveness of the supercritical hydrothermal synthesis pilot plant is systematically introduced, including rapid and uniform mixing, high Reynolds number, precise control of reaction time, avoidance of blockage and corrosion, and automation and safety control of the pilot plant. In addition, the synthesis mechanism and experimental results of supercritical hydrothermal synthesis of nano copper are further introduced. Finally, we analyze the economy of the pilot plant. The experimental research on the continuous hydrothermal synthesis of nano copper on a pilot scale may provide some guidance for future commercialization.