85results about How to "Reduce heat of reaction" patented technology

An object of the invention is to realize a method of determining an abnormality in a particulate filter (5) capable of trapping and oxidizing particulate matter contained in exhaust gas in which even a minor abnormality in which small quantity of particulate matter can pass through the particulate filter (5) can be determined with a high degree of accuracy. To achieve this object, the abnormality determination method according to the invention, the transition of the inflowing exhaust gas temperature in and the outflowing exhaust gas temperature out of the particulate filter (5) during deceleration operating, and the degree of decrease in the outflowing exhaust gas temperature relative to the inflowing exhaust gas temperature is computed based on the transition. If the degree of decrease exceeds a threshold value, it is determined that the particulate filter (5) is abnormal.

The present invention provides a carbon dioxide absorber capable of efficiently and stably removing carbon dioxide in a gas or solution. This carbon dioxide absorber contains an amine compound, a weakly acidic compound and water, the pKb value of the amine compound in an aqueous solution at 30° C. is 4.0 to 7.0, the pKa value of the weakly acidic compound in an aqueous solution at 30° C. is 7.0 to 10.0, and the weakly acidic compound is present in an amount within the range of 0.01 equivalents to 1.50 equivalents with respect to amino groups of the amine compound.

The invention relates to an absorbing agent for catching or separating carbon dioxide from gas mixture, which mainly comprises the components by weight percent: 10-50wt% of N-ethylethanolamine, 10-40wt% of tetramethylene sulfone and balance water. The absorbing agent adopts the N-ethylethanolamine as effective component, and the N-ethylethanolamine has high solubility for low-pressure carbon dioxide, good desorbing effect, lower reaction heat of absorption reaction and lower energy consumption for catching or separating the carbon dioxide; and as the 3-dimethyl amino-1-propyl alcohol has the functions of improving the desorbing effect and reducing the volatilization of water, so that the energy consumption of desorbing is further reduced. The absorbing agent can be used for catching or separating the carbon dioxide in various gas mixtures such as flue gas, refinery gas, natural gas, synthesis gas, shift gas, hydrogen preparation gas and the like.

The invention discloses a cross flow type two-stage moving bed active coke waste gas integrated purification tower which comprises a purification tower main body, wherein the purification tower main body is provided with an active coke feeding region, a denitration region, a transitional layer, a desulfuration region and a discharging layer sequentially from top to bottom; the denitration region comprises a denitration region active coke bed layer, a denitration region inlet chamber and a denitration region outlet chamber; the desulfuration region comprises a desulfuration region active coke bed layer, a desulfuration region outlet chamber and a desulfuration region inlet chamber; the transitional layer comprises an inlet chimney flue with a waste gas inlet, and a discharge hopper, the inlet chimney flue is arranged above the desulfuration region inlet chamber in a conducting manner, the denitration region active coke bed layer is connected with the desulfuration region active coke bed layer through the discharge hopper, and the desulfuration region outlet chamber is connected with the denitration region inlet chamber in a conducting manner. According to the invention, the pollution purification efficiency is high, the active coke utilization ratio is high, and the circulation volume is small; airflow distribution is uniform and the resistance is small; the flowing of the active coke is unobstructed and uniform, the denitration efficiency is high, and the operation is stable.

In an internal combustion engine diagnosis apparatus comprising a cleanup catalyst arranged on an exhaust pipe of an internal combustion engine and an HC adsorption catalyst arranged downstream of and in parallel to the cleanup catalyst, degradation and failure of the HC adsorption catalyst is accurately diagnosed. The internal combustion engine diagnosis apparatus comprising the cleanup catalyst arranged in the exhaust pipe of the internal combustion engine; and the HC adsorption catalyst arranged in parallel to and downstream of the cleanup catalyst, during high temperature period the HC adsorption catalyst desorbing and cleaning up HC desorbed during low temperature period, wherein degradation of the HC adsorption catalyst is diagnosed based on a gradient of temperature of the HC adsorption catalyst during a period when temperature of the HC adsorption catalyst is within a range of 50° C. to 250° C.

The invention discloses a method and equipment for preparing hydrocarbon by methyl alcohol or/ and dimethyl ether. The invention is mainly characterized in that raw material gases, such as methyl alcohol or/ and dimethyl ether and the like pass through fixed bed reaction composition equipment for catalysis to generate hydrocarbon, wherein the fixed bed reaction combination equipment is at least provided with two reaction zones, and each reaction zone is provided with a heat exchange tube set capable of independently adjusting heat exchange medium temperature; after reaction gases separate target product hydrocarbon and water by heat exchange and cooling, expect that less chillout recycle gas is mixed with raw material gas, reaction for generating target product hydrocarbon is carried out.The invention has the beneficial effects of small catalyst layer temperature difference, low recycle ratio, high synthetic ratio, small investment, high output, energy saving and consumption reduction.

The invention discloses a method and a device of continuously synthesizing tetramethyl ammonium carbonate by multi-reactors in series. Liquid-phase reaction materials in each reactor are connected in series through a pipeline. Gas-phase reaction materials are connected in parallel to keep the pressure between reactors balanced. The reaction materials flow into a next stage reactor from a previousstage reactor through the difference of liquid level in the reactors. The two stage reactors have a difference of liquid level of 0.5-1.0 m. The tetramethyl ammonium carbonate is prepared by continuously adding raw materials including dimethyl carbonate, trimethylamine and solvent methanol to a first stage tank reactor in a mole ratio of 1:0.8:3-1:1.5:8, leading a reaction mixture to continuouslyflow out from the last stage tank reactor, recycling a reaction solvent and an unconverted reactant by flash evaporation, then re-adding to the first stage tank reactor for recycling, and finally removing the solvent and the unconverted reactant. The operation pressure of the invention is the lowest, the reaction is stable, and continuous operation and automatic control are realized. Simultaneously, the reaction materials are heated to a reaction temperature by reaction heat, so the energy is saved and the production cost is reduced.

The present invention relates to an electrochemical energy storage and conversion device belonging to the technical field of lithium ion battery, which comprises a positive electrode, a negative electrode, a diaphragm and electrolyte and is characterized that the positive electrode is composed of transitional metal lithium ion compound capable of absorbing/discharging lithium ions. The negative electrode is composed of active lithium ion battery material with oxidation and reduction potential higher 1.0V vs. Li/Li+ and mixture or composite of active carbons. The present invention provides a novel energy storage device characterized by safety and high specific energy during high-power discharge and has the advantages of high specific power, great safety and long service life, etc.

The invention discloses an isobutene polymerization reaction method and device, and belongs to the field of petrochemical engineering. The reaction method comprises the following steps: carrying out afirst superposition reaction on a reaction material containing mixed C4 in a first superposition reactor at a first set pressure and a first set temperature; cooling the first reaction product from the first overlapping reactor to a second set temperature, and carrying out a second overlapping reaction in a second overlapping reactor under a second set pressure; and fractionating the second reaction product from the second superposition reactor to obtain a diisobutylene product. Wherein the first set temperature is the bubble point temperature of the mixed C4 under the first set pressure, andthe first set temperature is lower than the deactivation temperature of the catalyst in the first superposition reactor; the second set pressure is greater than the first set pressure. By utilizing the method, the conversion rate of converting isobutene into diisobutene can be remarkably improved, and the cost can be reduced.

The invention relates to a double-kettle type continuous nitration reaction device. The double-kettle type continuous nitration reaction device is characterized by comprising a nitric acid feed pump and a concentrated sulfuric acid feed pump, wherein the nitric acid feed pump is connected to a nitric acid feed pump; a flowmeter is arranged on the nitric acid feed pipe; the other end of the nitric acid feed pipe is connected to a primary reaction kettle; a spray head is arranged in the primary reaction kettle; the spray head is connected with the other end of the nitric acid feed pipe; the concentrated sulfuric acid feed pump is connected to the primary reaction kettle through the concentrated sulfuric acid feed pipe; a primary jacket is arranged outside the primary reaction kettle; the primary jacket is connected to a primary cooling water inlet and a primary cooling water outlet; the lower part of the primary reaction kettle is connected to a primary U-shaped bend pipe; the other end of the primary U-shaped bend pipe is connected to a secondary reaction kettle; the height of a nitric acid inlet of the secondary reaction kettle is lower than that of a nitric acid inlet of the primary reaction kettle; a secondary jacket is arranged outside the secondary reaction kettle; the secondary jacket is connected to a secondary cooling water inlet and a secondary cooling water outlet; the lower part of the secondary reaction kettle is connected to a secondary U-shaped bend pipe; and the secondary U-shaped bend pipe is connected to a discharge pipe.

The invention relates to a carbon dioxide absorbent used for capturing after combustion. The carbon dioxide absorbent is characterized by being composed of a main absorbent polyethyleneimine (PEI), auxiliary absorbents TEPA, MEA, MDEA, DEA and PZ, an antioxidant sodium sulfite, potassium sulfite or ammonium sulfite, a corrosion inhibitor sodium molybdate, sodium chromate, sodium vanadate or ammonium molybdate, and water. The molecular weight of polyethyleneimine (PEI) is 300-500; polyethyleneimine has a branch shape, and the molecule comprises three amino groups including primary amine, secondary amine and tertiary amine; and compared with other types of organic amines, polyethyleneimine has higher amine density. A compound absorption solution has relatively high carbon dioxide absorption amount, relatively rapid absorption speed, low regeneration energy consumption and high stability, so that the absorbent has a very great application prospect in the aspect of capturing carbon dioxide after combustion.

The invention discloses an application of 4,4-bis-1,3,2-dioxazothiophene-2,2-dioxide, and electrolyte and a lithium ion battery. The 4,4-bis-1,3,2-dioxazothiophene-2,2-dioxide can be applied to preparation of the electrolyte, when the prepared electrolyte is utilized in the lithium ion battery, the 4,4-bis-1,3,2-dioxazothiophene-2,2-dioxide in the electrolyte can enhance film formation property ofpositive and negative electrode interfaces under the high voltage, a stable passivation film can be formed on positive and negative electrodes of the battery, the passivation film has low impedance property, fast charging property of the lithium ion battery can be improved, film thickness is thin, compactness is good, stability is high, the positive and negative electrode interfaces can be protected, stability of the electrolyte is improved, internal electronics of the battery can be absorbed during the hot box test, heat of reaction is reduced, and safety of the battery is improved.

The invention provides a method and a device for transforming high-concentration SO2 flue gas to prepare sulfuric acid and belongs to the field of sulfuric acid preparation. The method and the deviceare suitable for transforming the high-concentration SO2 flue gas to prepare the sulfuric acid and the problems that reaction heat of one section of transforming the high-concentration SO2 flue gas toprepare the sulfuric acid is too high and a catalyst is inactivated due to high temprature are solved. According to the method and the device, dry air and part of high-concentration SO2 flue gas aremixed and diluted; the concentration of the diluted SO2 flue gas is controlled to be 10 percent+/-0.5 percent; the diluted SO2 flue gas is pre-transformed to obtain SO3 flue gas with a certain concentration; then the flue gas containing SO3 and the residual part of main flue gas are mixed and mixed gas enters a main transforming device and is transformed. By adopting the method and the device, provided by the invention, the concentration of SO2 is controlled to be 10 percent+/-0.5 percent through mixing with the dry air, and the SO3 flue gas with the certain concentration is transformed through pre-transformation. The transformation rate of each phase can be controlled very well and the stable and reliable sulfuric acid can be produced through utilizing the high-concentration SO2 flue gas;meanwhile, the catalyst in the transforming device is ensured not to be damaged.