34 results about "Oxidation-Reduction Activity" patented technology

The invention relates to a method and to a plant for chemical looping oxidation-reduction combustion (CLC) of a gaseous hydrocarbon feed, for example natural gas essentially containing methane. According to the invention, catalytic steam reforming of the feed is performed between two successive feed combustion steps on contact with an oxidation-reduction active mass in form of particles. The reforming catalyst is arranged in a fixed bed in an intermediate reforming zone (130) between the two reduction zones (120, 140) where the two combustion steps are conducted.

FIG. 2 to be published.

The invention relates to preparation and applications of a biocarbon supported thermally activated iron containing ore composite material. Thermally activated iron containing ores are loaded on the surface of biocarbon. The preparation method comprises following steps: grinding iron containing ores and a biomass material, then evenly mixing ores and the biomass material according to a certain massratio, evenly pressing and moulding the mixture, burning the mixture in a reductive atmosphere, naturally cooling, and milling the mixture in an anaerobic atmosphere to obtain fine powder, namely thebiocarbon supported thermally activated iron containing ore composite material. The prepared biocarbon supported thermally activated iron containing ore composite material has the characteristics oflarge specific surface area, high stability, and strong oxidizing-reducing activity. Compared with biomass or thermally activated iron containing ores, the composite material has a prominently improved performance on removing or stabilizing heavy metal ions in water and soil, and thus can be used to process heavy metal pollution of water and soil.

The invention discloses a method for detecting endotoxin. The method includes a material with oxidation reduction activity is added in tachypleus amebocyte lysate, a sample to be tested is added in the tachypleus amebocyte lysate, the sample to be tested may comprise the endotoxin, an oxidation reduction potential corresponding to the material with the oxidation reduction activity is exerted on the tachypleus amebocyte lysate, size of current passing through the tachypleus amebocyte lysate is monitored in real time simultaneously, and concentration of the endotoxin in the sample to be tested is obtained. Logarithm linear relationship exists between the concentration of the endotoxin added in the tachypleus amebocyte lysate and a time dropping point of the current passing through the tachypleus amebocyte lysate. Viscosity change in a tachypleus amebocyte lysate solidification process is shown through an electrochemical process directly, interference of sample colors is avoided, detection of the endotoxin can be achieved rapidly and accurately, and the method for detecting the endotoxin can be widely applied to the field of drug quality control, medical equipment pyrogen monitoring and the like.

The invention belongs to the technical field of biomedical composite materials, and discloses a high-oxidation-reduction-activity bovine serum albumin-carbon nanotube composite electrode, a preparation method thereof and an application of the composite electrode. Carbon nanotubes (CNTs) are dispersed under the action of an ultrasonic wave and bovine serum albumin (BSA) and are dropped onto a conductive substrate, the conductive substrate is activated by a drying and continuous circulation voltmeter-ammeter method to prepare the BSA-CNTs composite electrode, and non-oxidation-reduction transthyretin high-oxidation-reduction-activity is given. The preparation method has the advantages that the method is rapid, simple and convenient to operate, low in cost and environmentally friendly, efficient and stable, raw materials are easily acquired and the like. The method has a wide application prospect in the field of biological analysis and electro-catalysis.

The invention provides an electrochemical immunosensor for detecting tiamulin antigen and a preparation method thereof. According to the invention, AgNPs is reduced to GO in situ to obtain the Ag-GO nano composite material, and the Ag-GO nano composite material shows good conductivity and oxidation-reduction activity. Perfluorosulfonic acid has excellent film-forming ability and high chemical stability and is used as a dispersing agent to obtain an Ag-GO-Nf composite solution, and the composite solution is used for modifying the surface of a basic electrode. Then, gold nanoparticles are electrodeposited on the surface of Ag-GO-Nf, and the effects of fixing an antibody and amplifying an electrochemical signal are achieved. The electrochemical immunosensor constructed by applying the method is simple, convenient, efficient and sensitive, has a wide detection range and a low detection limit when being used for detecting tiamulin antigens, and has good accuracy when being applied to detection of tiamulin residues in samples of animal-derived foods such as eggs, pork and pork livers.

The invention relates to an iron-manganese composite chromium-removal material and a preparation method thereof, and belongs to the technical field of environmental materials. According to the preparation method, under the regulation and control of a heating and reducing gas atmosphere, uniformly mixing iron and manganese minerals according to a certain proportion; the prepared iron-manganese composite material with high adsorption capacity can solidify heavy metal chromium Cr (VI) in water and soil, and has the characteristics of high adsorption capacity, wide pH application range, high stability, high oxidation-reduction activity, environment friendliness, strong and long lasting solidification effect and the like. The preparation method of the novel chromium removal material is simple,green and economical, and the application prospect in the aspects of purification treatment of Cr (VI)-containing wastewater and remediation of Cr (VI) contaminated soil is promising.

The invention relates to the field of a lead-acid storage battery, and discloses a <pi>-type-conjugated oxidation reduction polymer modified lead storage battery and a preparation method therefor. Positive electrode lead paste of the battery comprises 98.5-99.5 parts of lead powder, 0.2-0.8 parts of additive and 0.3-0.7 parts of mixed polymer powder; and the mixed polymer powder is prepared from a <pi>-type-conjugated oxidation reduction polymer, a surface anti-oxidation functional group sulfonated arene polymer and single-wall carbon nanotubes. The active material of the lead storage battery comprises the surface-modified and anti-oxidation functional group conjugated oxidation reduction polymers, so that strong electronic storage capability and rapid electronic reaction speed are achieved; the polymers comprise available oxidation reduction nodes, so that relatively strong oxidation reduction activity is achieved; therefore, the lead storage battery has relatively high energy density, and the discharging time of the battery is obviously prolonged in a high-rate discharging condition of the battery; and meanwhile, the service life of the battery is prolonged.

The invention relates to a weather-resistant oil-water mixed gel platform and a preparation and application thereof, a preparation method comprises the following steps: (1) modifying chondroitin sulfate to prepare modified chondroitin sulfate with double bonds as a cross-linking agent; (2) mixing ethylene glycol and water to prepare an oil-water mixed solution; (3) diluting concentrated sulfuric acid with an oil-water mixed solution to obtain a mixed solvent; (4) mixing the prepared cross-linking agent with a solvent, and adding a monomer and a photo-initiation system to prepare a uniform precursor solution; (5) gelling the obtained gel precursor solution to prepare oil-water mixed gel; and (6) loading mercaptopyridine on the prepared oil-water mixed gel to prepare the oxidation-reduction active oil-water mixed gel. Compared with the prior art, the preparation process is convenient and efficient, the material is green and environment-friendly, and the prepared gel platform has all-weather tolerance and ion transfer capability and can be used for preparing electronic energy storage devices.

The invention discloses a CaMnO3 type perovskite material as well as a preparation method and application thereof. The CaMnO3 type perovskite material with the proper oxygen vacancy is prepared by regulating and controlling the ratio and the pH value of calcium salt, manganese salt and a chelating agent to prepare a powder material, then calcining the powder material at low temperature, calciningthe powder material at high temperature and finally carrying out ammonia gas heat treatment. The preparation method is simple to operate, easy in raw material obtaining, low in cost and capable of realizing mass production. In addition, the CaMnO3 type perovskite material prepared by the method is uniform in particle, large in specific surface area and high in production repeatability, basically has no performance difference in different batches of samples, and is further high in oxidation-reduction activity and good in stability when being used as a catalyst material.

The invention discloses a parent nucleus substituted naphthalimide electrochemical polymerization monomer and a preparation method thereof. According to the invention, a series of D-pi-A (donor-pi-acceptor) type organic dye molecules which take parent nucleus substituted naphthalimide as an acceptor and take triphenylamine or carbazole or thiophene and other elements with electrochemical polymerization activity as donors are synthesized. The electron cloud distribution and molecular orbital energy level distribution of the naphthalimide are adjusted through different parent nucleus substituents. The synthesized D-pi-A (donor-pi-acceptor) type organic dye molecule has excellent oxidation-reduction activity, and can form a thin film through electrochemical polymerization to be applied to the photoelectric field.

The invention relates to the technical field of photoelectric materials, in particular to a pyridine-bridged ruthenium acetylene-terminated compound, which has a structural general formula shown in the specification, in the formula, Py is one of H or CH3, and R' is one of H, F, CH3, OCH3, CHO, COOEt and CN. According to the compound, pyridine and derivatives thereof are used as conjugated bridge chains, metal ruthenium is used as an oxidation-reduction active end group, and an electrochemical method test shows that the compound shows two continuous single-electron oxidation-reduction processes, shows good electron interaction (coupling), has the good charge transmission performance and has the good potential application prospects in the field of molecular wires.

The invention discloses a design method of a high-specific-energy lithium ion battery with both electrochemical performance and safety performance. The design method comprises the steps of selecting materials, specifically, selecting materials with oxidation-reduction activity under high voltage as materials to be evaluated; conducting preparation, specifically, preparing a lithium ion button battery taking the to-be-evaluated material as a positive electrode; performing evaluation, specifically, verifying the button battery, and evaluating the oxidation capacity and electrochemical performance of the to-be-evaluated material; and conducting material selection, specifically, preferably selecting from the multiple to-be-evaluated materials to obtain the positive electrode material with both electrochemical performance and safety performance. According to the method disclosed by the invention, the positive electrode of the battery is screened by utilizing the high-voltage oxidation-reduction activity and gas production behavior of the positive electrode material, so that the overcharge temperature rise is controlled within a certain range, and the overcharge safety performance of the lithium battery is improved; and meanwhile, the overcharge safety performance of the positive electrode material can be rapidly evaluated, the research and development efficiency is improved, and the development cost is saved.

The invention relates to short fiber polyaniline and an application thereof in a water-based heavy anti-corrosion coating. The short fiber polyaniline is prepared by the following steps: firstly, uniformly mixing CNT (Carbon Nanotube) which accounts for 1-5wt% of aniline and aniline, performing ultrasonic dispersion, adding water, and uniformly stirring to obtain a suspension; adding concentrated hydrochloric acid, mixing, and adjusting the pH value of the suspension to be below 2; dropwise adding an ammonium persulfate aqueous solution in an ice bath environment of 0-5 DEG C to initiate an aniline oxidation polymerization reaction; and after the reaction is finished, filtering, washing and drying to obtain the product. According to the invention, short-fiber-shaped polyaniline with controllable morphology is synthesized, a small amount of CNT not only has a morphology adjusting function, but also can increase the electron transport performance of polyaniline, and the oxidation-reduction activity of polyaniline is effectively expanded from acidity to neutrality; the short-fiber-shaped polyaniline not only can be easily and uniformly dispersed in the waterborne epoxy grafted acrylic coating, but also the formed coating has the characteristics of excellent toughness, adhesive force and long-acting corrosion resistance.

The invention relates to an electroosmotic pump system, a manufacturing method of a functional electrode of the electroosmotic pump system and a fluid conveying method. The electroosmotic pump system comprises a liquid storage tank, an electroosmotic driving module, a fluid pipeline, a plurality of valves, a power supply and a control module; the electroosmosis driving module comprises a functional electrode with reversible oxidation-reduction activity; the fluid pipeline comprises two communicated three-way pipelines, the electro-osmosis driving module is arranged at the communication position of the two three-way pipelines, each three-way pipeline is communicated with the liquid storage pool and the outside, and the valves are opened or closed to form a fluid channel for target liquid to flow to the outside after flowing through the electro-osmosis driving module from the liquid storage pool; and the flowing directions of the target liquid flowing through the electroosmosis driving module in the first fluid passage and the second fluid passage are opposite. According to the electroosmotic pump system, the functional electrode with reversible oxidation-reduction activity, the first fluid passage and the second fluid passage are arranged, so the oxidation-reduction activity of the functional electrode can be repaired, and the electroosmotic pump can stably work for a long time.

The present invention concerns a combustion reactor (300) for chemical looping combustion (CLC) configured to operate in a fluidised bed, comprising:

• • a lower chamber (320) forming a first reaction zone for the combustion of a hydrocarbon feedstock in the presence of particles of an oxidation-reduction active mass, comprising a first side wall and being configured to include a dense fluidised bed;
  • an elongate upper chamber (340) with smaller passage cross-section than that of the lower chamber, forming a second reaction zone for the combustion of gaseous effluents originating from the combustion in the lower portion, comprising a second side wall and being configured to include a dilute fluidised bed;
  • an intermediate portion (330) connecting the two chambers, and including an inner wall forming a right angle with the side walls of the two chambers. The invention also relates to the facility and the CLC process incorporating such a reactor (300).