PHOTOCATALYTIC MICROREACTOR AND METHOD FOR OPERATION THEREOF Russian patent published in 2019 - IPC B01J19/00 

FIELD: chemistry.

SUBSTANCE: invention relates to apparatus for carrying out heterogeneous photocatalytic reactions in liquid-gas or liquid-liquid systems, including in the presence of solid catalyst particles, and can be used in chemical, petrochemical, pharmaceutical, food, biotechnological and other industries. Photocatalytic microreactor contains a vertical shell of a cylindrical translucent material, on the side surface of which one or more tubes of translucent material are wound, one of the ends of each of the tubes is used to supply the initial reagents, and the other end of each of the tubes is designed to output the finished product, a cylindrical casing with a reflective coating on the inner surface, mounted coaxially outside the shell, and a lighting element inside the shell. In this case, the tubes are laid on the surface of the shell with equal pitch into the installed thin-walled racks with grooves the way the axis of each of the tubes forms a zigzag line, and the number of rows of racks is even, the grooves in the even rows of racks are shifted up along the axis of the shell relative to the corresponding grooves in the odd rows of racks, and the closest distance from the surface of the tubes to the inner surface of the housing is from one to three external diameters of the tubes. During operation of the photocatalytic microreactor, the initial components are fed into the tubes of the microreactor, the flow rates of the phases are set such that a slug flow regime is formed in the tubes, wherein the lengths of the dispersed and continuous phase drops, related to the internal diameter of the tubes, are in the range from 2 to 10, the angle value α is set in the range between 30° and 60° to achieve the best mixing in solid and dispersed phases.

EFFECT: invention provides for intensification of mass transfer, improving the degree of utilization of light radiation, increasing the product yield per unit volume and increasing the efficiency of the apparatus.

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