Process Intensification via Rotating Packed Bed (Higee)

Dear Colleagues,

High gravity refers to the force exerted on material in an environment, which has much larger acceleration than the Earth’s gravitational acceleration (9.8 m/s²). On Earth, a high gravity environment is usually achieved by the centrifugal force generated by rotation. High gravity devices mainly include the rotating packed bed, rotating disk, rotating baffled bed, and so on.

Under the high gravity environment created by high gravity devices, liquid is sheared into micron to nanoscale liquid droplets, film, or ligaments. In addition, fluids are highly turbulent, and the interface between them is updated rapidly. All these lead to a great enhancement of micromixing and mass transfer with 1–3 orders of magnitude higher than that in conventional devices, increasing the macroscopic reaction rate. Consequently, the production efficiency per unit equipment volume can be greatly improved to decrease the volume of a device. Therefore, high gravity technology is considered a breakthrough technology to strengthen the transfer and heterogeneous reaction process, and high gravity devices are known as “transistors of chemical industry”.

At present, high gravity technology has been successfully applied to gas absorption, dust removal, water deoxidation, wastewater treatment, biological fermentation, nanomaterial preparation, desulfurization alkali regeneration, devolatilization, catalyst synthesis, organic synthesis, distillation, electrochemical reaction, polymerization, etc., exhibiting remarkable strengthening effects. High gravity technology has drawn more and more attention, and its application field has been gradually expanded.

Prof. Dr. Guangwen Chu
Prof. Dr. Baochang Sun
Prof. Dr. Yong Luo
Guest Editors

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