35results about How to "Increase the rate of the reduction reaction" patented technology

The invention discloses a vulcanized modification method for a Ni-Fe LDH electrode material. Urea is used as a precipitant and ferrous chloride is used as an iron source. Ni-Fe LDH grows on a nickel net substrate; and with a solvothermal method, vulcanization is carried out on the Ni-Fe LDH by using thiourea, sodium sulphide, or thioacetamide as a vulcanizing agent to obtain Ni-Fe LDH-S growing uniformly on the surface of the nickel net based on a cellular structure. Electrochemical performance evaluation is carried out on the Ni-Fe LDH-S in a 1M KOH electrolyte; and a potential window range is stabilized to be -1.1 to 0V. When constant-current charging and discharging are carried out in the potential window, the specific capacitance of the Ni-Fe LDH-S can reach 340 F/g, wherein the specific capacitance of the sample being Ni-Fe LDH without second-step vulcanization is only 45F/g. The result demonstrates that the specific capacity of the Ni-Fe LDH can be improved substantially.

The invention provides a method for removing nitrate nitrogen in a water body, which comprises the following steps: 1, adding ferrous sulfate heptahydrate, polyethyleneglycol and graphene into deoxidized distilled water, mixing to prepare a suspension, then adding a potassium borohydride solution into the suspension, stirring, filtering, and washing to obtain graphene loaded nano iron; and 2, uniformly mixing the graphene loaded nano iron and a water body to be treated, and then performing constant-temperature oscillation treatment, thus ensuring that the removal rate of nitrate nitrogen in the water body is above 85%. According to the invention, the nitrate nitrogen in the water body is removed by using the graphene loaded nano iron, so that the method is simple in technical process, low in production cost and easy to realize popularization and application, maximally keeps the favorable characteristics of graphene and nano iron, and can efficiently and quickly remove the nitrate nitrogen in the water body, thereby obviously improving the nitrate nitrogen removal effect and having wide application value.

The invention discloses an integrated complex ferrous wet flue gas desulfurization and denitration method which comprises the following steps: introducing flue gas into the bottom of an absorption section of an absorption device, and contacting the flue gas with a complex ferrous absorbent solution which is introduced into the absorption device and has the temperature of 30-60 DEG C on the absorption section in a reflux mode, wherein an ultrasonic regeneration tank is arranged at the bottom of the absorption device; and by taking complex ferrous as an absorbent, reducing the regenerated complex iron ions by adopting ultrasound-enhanced sulfite. Due to the addition of ammonium sulfite, Fe (III) EDTA (Ethylene Diamine Tetraacetic Acid) and Fe (II) EDTA (NO) can be reduced into Fe (II) EDTA, regeneration of the absorbent is promoted, byproducts subjected to desulfurization and denitration can be crystallized and recovered to serve as ammonium fertilizers, and resource utilization can be realized. The method is simple in process, high in absorption efficiency and complete in dust removal, the absorbent can be repeatedly utilized, the desulfurization rate is over 99 percent, and the denitration rate is over 97 percent.

The invention relates to an iron and nitrogen co-doped carbon oxygen reduction catalyst. The preparation method comprises steps: a carbon carrier is dissolved in an organic solvent, ultrasonic dispersion for being uniform is carried out, soluble iron salt is added under a stirring condition, and after uniform mixing, a mixed solution is obtained; the mixed solution is transferred to a reaction kettle, a reaction is carried out under the stirring condition, the reaction solution after the reaction is subjected to solid-liquid separation, washing and drying to obtain a solid material, the solidmaterial and a nitrogen source are mixed and grinded, and a pyrolysis precursor is obtained; and the pyrolysis precursor is roasted in an inert atmosphere to obtain the iron and nitrogen co-doped carbon oxygen reduction catalyst, wherein the carbon carrier is Ketjen black nano carbon black particles. Compared with the prior art, the method has the advantages of high oxidation reduction catalytic activity, good electrochemical stability, simple and controllable preparation method, short period, rich raw material reserves, low cost, capability of realizing large-scale production and the like.

The invention discloses a method for preparing Fe2O3 nano-rod array electrodes by means of in-situ vulcanization and carbon coating and application of the Fe2O3 nano-rod array electrodes. The method includes sintering titanium sheets, iron chloride and sodium sulfate by a hydrothermal synthesis process to obtain nano-rod-shaped Fe2O3 arrays; vulcanizing iron sesquioxide by the aid of thiourea or thioacetamide by solvothermal process to obtain Fe2O3-S; carrying out carbon coating on the Fe2O3-S by plasma-enhanced chemical vapor deposition process to obtain Fe2O3-S@C. The titanium sheets are used as a substrate, the iron chloride is used as an iron source, and the sodium sulfate is used as a precipitator. The thiourea or the thioacetamide is used as a vulcanizing agent. The method and the application have the advantages that the maximum capacity of original Fe2O3 electrodes in 1M KOH electrolyte is only 13.67 mAh/g, can be improved to reach 214.3 mAh/g after the Fe2O3 electrodes are vulcanized, and can reach 768.3 mAh/g after carbon coating optimization is carried out on the Fe2O3 electrodes; the capacity retention rate of the Fe2O3-S is only 7.95% after the Fe2O3-S is cycled by 100 times, and the capacity retention rate of the Fe2O3-S@C can reach 92.13%.

The invention provides a two-stage selective non-catalytic reduction (SNCR) denitrification system and a two-stage SNCR denitrification method. The system and the method can effectively prolong the residence time of a reductant in a furnace, enhance a mixing effect of the reductant and flue gas, and promote a reduction reaction to be rapidly carried out at a low-temperature section, thereby greatly improving the denitrification efficiency of SNCR and having considerable economic and environmental benefits. The system comprises a boiler; two stages of cyclone separators are arranged on a horizontal flue behind a furnace arch of the boiler in a way of series connection; a first stage SNCR denitrification reactor and a second stage SNCR denitrification reactor are respectively arranged in front of the two stages of cyclone separators; an outlet end of the later cyclone separator is connected with an exit flue; the first stage denitrification reactor is internally provided with a pluralityof main spray guns, and the main spray guns are evenly arranged on the cross section of the horizontal flue in multiple layers; the second stage denitrification reactor is internally provided with ammonia supplement spray guns, and the ammonia supplement spray guns are arranged along the cross section of the horizontal flue.

The invention provides a method for treating chlorine- containing organic substance, relating to chlorine- removing from chlorine- containing organic substance in water technique. The surface of iron used for water treatment is catalyzed through chemical copper plating to increase the reduction effect of iron, then modifies the surface of plated copper by using surface active agent to change the hydrophilicity and lipophilicity of iron surface and increase the dissolution and adsorption of organic substance on the iron surface, and improve the transmission condition of organic substance to iron surface and the reaction speed. The invention is characterized by simple device, convenient management, low cost and low energy consumption.

The invention relates to a method for removing chromium and nickel in acid washing waste liquor. The method is implemented as follows: a removal process is specifically divided into the following two steps: adding a proper amount of iron powder into the acid washing waste liquor, performing reaction for a period of time at proper temperature and stirring speed, filtering and separating the acid washing waste liquor and the iron powder, adding a proper amount of nano-iron into the acid washing waste liquor, performing reaction for a period of time at proper temperature and stirring speed, and filtering and separating the acid washing waste liquor and the nano-iron. The acid washing waste liquor from which heavy metals are removed is consistent with the national standard HG/T4200-2011 about a raw material ferrous chloride for polyferric chloride, and can be used for preparing an iron-based coagulant. The method provided by the invention is simple, fast, low in cost and energy consumption and environment-friendly, and has a good removal effect on chromium and nickel ions with a relatively high concentration, a broad application prospect and high industrial application value.

The present invention provides a zirconia carrier catalyst based on ternary copper-based microspheres and a preparation method thereof. The zirconia carrier catalyst based on ternary copper-based microspheres includes ternary copper-based microspheres and sheet-like tetragonal ZrO2 The carrier, the preparation method is: stir and mix the copper salt solution and the zirconium salt solution evenly, slowly add the alkali solution dropwise, add the co-catalyst, stand for aging, wash with water and suction filter, dry and grind into powder, roast and cool to obtain copper oxide/oxidized Zirconium precursor: Add the copper oxide/zirconia precursor to the alkali solution, stir and heat up to medium temperature in a water bath, slowly add hydrazine hydrate and glucose, and perform the reduction reaction. After the end, quickly add ice water to cool, wash and filter, and vacuum dry. A zirconia supported catalyst based on ternary copper-based microspheres is obtained. The preparation method of the invention is simple and efficient, can control the change from Cu2+ to Cu+ to Cu0, can control the degree of reduction, increases the ratio of Cu0 to Cu+, and has high catalyst activity.

The invention discloses a preparation method of sponge iron. The preparation method comprises the following steps that step one, a raw material is prepared; step two, a reducing agent is prepared; andstep three, the technological process is carried out, specifically, (1), 42 columns of silicon carbide tank bodies are stacked on a vehicle surface; (2), a cylinder mould is placed at the center position of the silicon carbide tank bodies; (3), gaps between the cylinder mould and the silicon carbide tank bodies are filled with the reducing agent prepared in the step 2; (4), the cylinder mould isfilled with a prepared raw material, and a silicon carbide tank body opening is sealed; (5), a tunnel kiln is reduction is carried out; and (6), a product is subjected to drawing and cooling processing to form terminal product sponge iron powder. Compared with the prior art, the preparation method of the sponge iron has the advantages that the yield is increased, the cost is reduced, the product quality index is improved, and the product meets the high-end requirement of a reduced iron powder market; and the defects existing in a reduction technology are overcome.

The invention belongs to the technical field of microbial fuel cells. The invention relates to a modified carbon brush electrode and a preparation method thereof. The modified carbon brush electrode comprises an anode and a cathode; the preparation process comprises the following steps of: enabling the carbon brush to besubjected to acid treatment; introducingoxygen-containing functional groups into the surface of the carbon brush; using a hydrothermal synthesis method to grow iron oxide nanoparticles on the surface of the carbon brush in situ; immersing the carbon brush with the iron oxide grown on the surface into an ethanol mixed solution containing a conductive polymer monomer; sequentially adding deionized water or a solution containing a nano carbon material and hydrochloric acid, reacting iron oxide on the surface of the carbon brush with acid to generate Fe<3+>, and inducing a conductive polymer monomer near the carbon fiber to be subjected to in-situ polymerization reaction toform a conductive polymer film or a conductive polymer film containing a nano carbon material, thereby obtaining a modified carbon brush anode; and further calcining the modified carbon brush anode in an inert atmosphere to obtain the in-situ growth nitrogen-doped or iron-nitrogen-doped oxygen reduction reaction catalyst carbon brush cathode.

The invention provides an efficient smelting method of silicon-manganese alloy. The efficient smelting method comprises the following steps: adding raw materials including water-washing residues, silicon-manganese alloy residues, prebatching being prepared from smelting dust caused by dust removal of smelting flue gas, manganese ores and the like into a submerged-arc furnace and performing smelting so that waste residues produced in a smelting process of a part of silicon-manganese alloy are effectively treated on one hand, and the dried water-washing residues and silicon-manganese alloy residues are beneficial for improving the thermodynamics conditions of the submerged-arc furnace in a smelting process on the other hand, and thus, the smelting efficiency is improved. The water-washing residues and the smelting dust contain a large amount of calcium oxide and magnesium oxide, so that regulation demands on alkalinity in the submerged-arc furnace can be met, the dried water-washing residues, the silicon-manganese alloy residues and the smelting dust contain a large amount of silicon and manganese, and the recycling ratios of the silicon and the manganese are obviously increased after re-smelting. Meanwhile, the the dried water-washing residues and the smelting dust has higher smelting point, by coordinating with addition of aluminum oxide, the furnace residue smelting point can be effectively increased, and thus, the furnace temperature is improved, and reduction reaction velocity in the submerged-arc furnace is quickened.

The invention discloses a mineral powder reduction system, which includes: a reactor, a heating device and a gas distributor. The reactor includes a feed section, a reduction section and a cooling section. The reduction section is located below the feed section and communicates with the feed section. , the cooling section is located below the reduction section and communicates with the reduction section, the top of the feed section is provided with a feed port, the bottom of the cooling section is provided with a discharge port, and the side wall of the reactor is provided with a reduction tail gas outlet and a reduction gas inlet The heating device is arranged in the reduction section to provide heat for the reduction reaction in the reduction section; the gas distributor is arranged in the feed section, and the gas distributor has a gas inlet and an upwardly facing gas outlet, and the gas inlet and the gas outlet are connected. The gas distributor is configured to blow off the falling mineral powder in the feeding section so that the mineral powder falls into the reducing section in a dispersed manner. According to the ore powder reduction system of the embodiment of the present invention, the ore powder can be fully dispersed by the gas distributor, thereby increasing the contact area between the ore powder and the reducing gas.

The invention relates to an antibacterial PP composite material and a preparation method thereof. The antibacterial PP composite material comprises the following components in parts by weight: 80 parts-100 parts of PP; 4 parts-6 parts of an antibacterial agent; and 0.1 parts-0.5 parts of an antioxidant; The antibacterial agent is the glucose/nano-Cu antibacterial agent, which is characterized in that due to the existence of a hydroxyl group and an amino group in the glucose molecule, a cage molecule having a similar network structure is formed by hydrogen bond, the compact crystal structure isformed to form the steric hindrance effect, and the surfaces of the nano Cu particles are separated to produce the stereoscopic protection effect, the contact between the nano-Cu particles is prevented, the agglomeration probability of the nano-Cu particles is reduced; so that the antibacterial property of the PP composite material can be better improved, which has great significance.

The invention relates to a conductive film repairing method which comprises the following steps of providing a conductive film to be repaired, wherein the conductive film comprises a base film, a structural layer and a conductive mesh, the structural layer and the conductive mesh are located on the base film; the structural layer is provided with a pattern groove, and the conductive mesh is formed by filling the pattern groove with a metal material; carrying out sensitization treatment on the conductive film; placing the conductive film subjected to sensitization treatment in a chemical copper plating solution; adding a reducing solution under a stirring condition; and carrying out standing, so that a deposited copper layer is formed on the surface of the conductive mesh, and the deposited copper layer is further filled in gaps with poor circuit breaking in the conductive mesh. According to the conductive film repairing method provided by the invention, sensitization and chemical copper plating are carried out on the surface of the conductive film, silver or gold in the conductive mesh plays a catalytic role in the process, a high reduction reaction rate exists nearby the conductive mesh, batch repairing can be carried out on the poor circuit breaking of the conductive mesh, the success rate is high, the efficiency is high, and automatic repairing can be achieved.