57results about How to "Reduce degradation cost" patented technology

The invention discloses a preparation method of a Sr<2+>-doped TiO2 composite hollow sphere photocatalyst, and belongs to the environmental protection field. The method comprises the following steps: adopting a template method-hydrolysis coating method to prepare a Sr<2+>-doped C / TiO2 core-shell particle, and calcining the particle at a certain temperature for a certain time to obtain the Sr<2+>-doped TiO2 composite hollow sphere photocatalyst. The Sr<2+>-doped TiO2 composite hollow sphere photocatalyst prepared in the invention can be used in the visible photocatalysis degradation of a cationic dye solution. The method has the advantages of pollution-free raw materials, simple technology, no emission of pollutants in the preparation process, short preparation period, less energy consumption and low cost, is a green synthesis technology, and can realize the large scale preparation. The doping of Sr<2+> improves the visible response of the photocatalyst, improves the lives of electrons and cavities, promotes the transmission of photoelectrons and substantially improves the visible photocatalytic activity of the catalyst.

The invention relates to a light / ozone-electricity-adsorption reaction device and method for extracting copper by degrading browning waste liquor. The device comprises a light / ozone synergistic decomposing device, an electrolysis device for degrading and recovering metal copper and an adsorption elution device. In the device, a photocatalyst and an oxygen catalyst are loaded on a porous activated carbon carrier with high specific surface area; under the synergistic effect of ultraviolet light and ozone, photo-generated electron pairs are prevented from compounding, long-time catalytic treatment activity is kept, a free radical.OH with strong oxidation activity is generated, organic matters in the browning waste liquor can be oxidized and degraded, and the complexing bond of the complex in the browning waste liquor can be broken; insoluble reticular titanium base material serves as an anode, a copper sheet material serves as a cathode, organic matters in the browning liquor is continuously degraded by electrolysis to generate a second-grade degrading product which is easy to adsorb, and valuable metal copper is recovered on the cathode; and finally, common activated carbon is used for adsorbing to effectively treat the browning waste liquor, so as to realize green and environment-friendly treatment of the browning waste liquor.

The invention discloses a method for the catalytic alcoholysis of (Polylactic Acid PLA) by a CaO / MCF (Mesocellular silica Foam) mesoporous basic molecular sieve, and belongs to the technical field of the high-value conversion of waste resources. The method is a reaction of degrading the PLA by using the CaO / MCF mesoporous basic molecular sieve as a catalyst and methanol as a reactant; after the reaction is finished, a methyl lactate product is recovered through operations of filtration, distillation and the like; the alcoholysis rate of the PLA can reach 98 percent or above; the selectivity of the product methyl lactate can reach 90 percent or above. According to the method, CaO / MCF is used as the catalyst; the methanol is used as a reactive raw material; a reaction condition is mild; a reaction method is simple; the price of the raw material is low; a process of recovering the product is simple; the catalyst can be repeatedly utilized; the degradation efficiency is high; the cost of degrading the PLA can be greatly industrially decreased; the method is actually an economical and effective way, and is worth popularizing.

The invention discloses a degradation device in a VOC exhaust gas treatment system for automobile interior processing, which works through an electric heating plate to heat and evaporate the hydrogen peroxide solution in the lower liquid storage chamber of the evaporation tank, and the water vapor and The hydrogen peroxide vapor moves up in the lower liquid storage chamber of the evaporator and enters the mixing chamber through the one-way air inlet. At the same time, the heat in the lower liquid storage chamber of the evaporator is transferred to the upper surrounding chamber of the evaporator. The upper surrounding chamber preheats the VOC exhaust gas to make it similar to the temperature of the steam in the mixing chamber. After the upper surrounding chamber of the evaporation tank preheats the VOC exhaust gas, it enters the mixing chamber along the overflow valve to mix with water vapor and hydrogen peroxide vapor. , by setting the evaporation tank and the mixing chamber, the heat of the steam itself can be used to preheat the VOC waste gas in advance, reducing the occurrence of hydrogen oxide vapor condensing into a liquid state, reducing energy consumption, and reducing the cost of VOC waste gas degradation.