36results about How to "Reduced mass transfer limitations" patented technology

The invention provides a titanium dioxide photonic crystal film for removing organic pollutants in the environment by photocatalytic degradation and a preparation method thereof, and belongs to the technical field of photocatalysis. In the invention, a film with a polystyrene opal structure is used as a template, sol is prepared by using tetrabutyl titanate, absolute ethanol and deionized water according to a certain molecular ratio of 1:100:5, the polystyrene template is repeatedly dip-coated with sol and sintered, and finally calcining is performed at a high temperature of 450 DEG C to remove the polystyrene template, and thus, the three-dimensional ordered porous titanium dioxide photonic crystal film with an inverse opal structure is obtained. The obtained titanium dioxide photonic crystal film has the characteristics of controllable film structure, high catalytic activity, high light utilization rate and simple preparation method and can realize high-efficiency removal of organicpollutants.

A method for introducing inhibitor into a fluid to be treated by forming a dispersion comprising droplets, particles, or gas bubbles of the inhibitor dispersed in a continuous phase of a carrier, wherein the droplets, particles, or gas bubbles have a mean diameter of less than 5 μm, and wherein either the carrier is the fluid to be treated or the method further comprises introducing the dispersion into the fluid to be treated. A system for inhibiting an undesirable component, the system comprising at least one high shear mixing device comprising at least one generator comprising a rotor and a stator separated by a shear gap, wherein the high shear mixing device is capable of producing a tip speed of the rotor of greater than 22.9 m/s, and a pump for delivering a mixture of a carrier and an inhibitor to the high shear mixing device.

Methods are described for depositing a film or discontinuous layer of discrete clusters, of material (e.g., metals, metal mixtures or alloys, metal oxides, or semiconductors) on the surface of a substrate, e.g., a patterned silicon wafer, by i) dissolving a precursor of the material into a supercritical or near-supercritical solvent to form a supercritical or near-supercritical solution; ii) exposing the substrate to the solution, under conditions at which the precursor is stable in the solution; and iii) mixing a reaction reagent into the solution under conditions that initiate a chemical reaction involving the precursor, thereby depositing the material onto the solid substrate, while maintaining supercritical or near-supercritical conditions. The invention also includes similar methods for depositing material particles into porous solids, and films of materials on substrates or porous solids having material particles deposited in them. The invention also covers methods of preparing a plated substrate by depositing a catalytic layer followed by a plating layer.

Use of a high shear mechanical device incorporated into a process for the production of cumene hydroperoxide as a mixer/reactor device is capable of decreasing mass transfer limitations, thereby enhancing the cumene hydroperoxide production process. A system for the production of cumene hydroperoxide from oxidation of cumene, the system comprising a reactor and an high shear mixer the outlet of which is fluidly connected to the inlet of the reactor; the high shear mixer capable of providing a dispersion air gas bubbles within a liquid, the bubbles having an average bubble diameter of less than about 100 μm.

The invention relates to a stable immobilized lipase product and a preparation method thereof. By the immobilized lipase product with high random ester exchange enzyme activity, mass transfer limitation is reduced.

The invention belongs to the technical field of harmless treatment of chromium slag and arsenic-containing wastewater, and relates to a co-treatment method of chromium slag and acidic arsenic-containing wastewater. According to the co-treatment method for the chromium slag and the acidic arsenic-containing wastewater, the inherent characteristics and complementarity of the chromium slag and the acidic arsenic-containing wastewater are fully utilized, and neutralization of alkali in the chromium slag, reduction/stabilization of hexavalent chromium, neutralization of acid in the acidic arsenic-containing wastewater and removal of arsenic are synchronously realized; the treatment cost of the chromium slag and the acidic arsenic-containing wastewater is reduced through the thought of treating waste with waste. A large number of strong acid substances exist in the acidic arsenic-containing wastewater, mineral occurrence state Cr (VI) in the chromium slag can be effectively converted into water-soluble state Cr (VI), and mass transfer limitation in the reduction and stabilization process of the Cr (VI) is reduced; and meanwhile, a large amount of mineral components with arsenic adsorption capacity exist in the chromium slag, so that arsenic in the wastewater can be effectively fixed, and the use and treatment cost of chemicals is greatly reduced.

The invention discloses an ultraviolet laser optical fiber ozone generator, which is characterized in that a pressure reducing valve and a flow transmitter are arranged on a communication pipeline between an oxygen tank and an ozone generator, an optical fiber coupler at the upper end of the ozone generator is connected with an ultraviolet laser light source through a conduction optical fiber, thelower end of the ozone generator is communicated with a dispersion optical fiber in the ozone generator, one end of the ultraviolet laser source is connected with a control system through a voltage regulator, the flow transmitter is connected with the control system, the upper portion and the lower portion of the interior of the ozone generator are each provided with a dispersion optical fiber fixing plate, gas channels are formed in the optical fiber fixing plates, and a gas outlet is formed below the ozone generator. During working, pure oxygen is decompressed and enters the ozone generator, the oxygen is distributed through the optical fiber fixing plates and enters the ultraviolet laser excitation chamber, ultraviolet laser radiates ultraviolet light to the periphery through the dispersion optical fiber, the oxygen absorbs the energy of the ultraviolet light to become oxygen monons, and the oxygen monons are combined with the oxygen atoms to produce ozone. According to the device,the illumination contact area is increased, light distribution is more uniform, mass transfer limitation is reduced, and the light utilization rate is remarkably increased.