35results about How to "Reduce the amount of hydrogen" patented technology

The invention relates to monocrystalline silicon wafer precleaning liquid and a cleaning method thereof. The invention is characterized in that the precleaning liquid comprises the following compositions: hydrogen peroxide, sodium hydroxide or potassium hydroxide, and water. The cleaning method of the monocrystalline silicon wafer precleaning liquid as in claim 1 is characterized in that the method comprises the following steps: putting a silicon wafer inserted into a flower basket into a uniformly mixed monocrystalline silicon wafer precleaning liquid at a temperature of 55-80 DEG C, performing ultrasonic cleaning for 60-600 seconds, after ultrasonic cleaning, rinsing with deionized water at 60 DEG C for 1 min, after deionized water rinsing, taking the silicon wafer out, and drying. The advantages of the invention are that with the hydrogen peroxide process, the alkali concentration is reduced; the hydrogen generation amount is low; no bubble trace is generated on the silicon wafer surface; no basket rinsing is caused; no obvious boundary is generated. Since the alkali concentration is reduced, the thickness reduction amount is effectively decreased, which facilitates the reduction of the fragment rate of battery pieces in subsequent procedures.

The catalytic rectification method for olefin production includes setting catalytic reaction area in the pre-depropanizing column of the olefin producing apparatus; selectively hydrogenating C3- acetylene hydrocarbons and diene while separating C3, C3-, C4 and C4+ fractions; making top gaseous matter flow into gaseous hydrogenating reactor for further eliminating C3- acetylene hydrocarbons and diene; and feeding the cauldron liquid C4+ to the further separation area. The said method of the present invention can convert most of the C3- acetylene hydrocarbons and diene into corresponding olefin, reduce the hydrogen amount into the deeply freezing system, lower the power consumption, simplify technological process, reduce investment, raise the selectivity of catalytic hydrogenation and raise olefin yield, and has prolonged catalyst operating period, stable operation and no loss of butadiene.

Provided is a carbon black which improves the electrical conductivity and flowability of a resin composition. Carbon black characterized by having the following characteristics: 24M4DBP absorption: At least 130 cm 3 /100 g (1,500 DEG C 30 min) dehydrogenation amount: At most 1.2 mg/g rystallite size Lc: From 10 to 17AA More preferably, it has the following characteristics: itrogen adsorption specific surface area: from 150 to 300 m 2 /g Average particle diameter: from 14 to 24 nm TAB adsorption specific surface area: from 120 to 220 m 2 /g DBP absorption: from 150 to 400 cm 3 /100 g oxygen-containing functional group density: at most 3 mol/m 2.

A method for producing a diamond-like carbon film is disclosed and comprises the following steps: base material is placed in a reaction chamber, an aromatic ring hydrocarbon is guided into the reaction chamber. The aromatic ring hydrocarbon is used as a reaction precursor, the carbon-like carbon film is grown on the substrate. The step of growing the diamond-like carbon film comprises controlling the temperature of the base material at 200 DEG C to 800 DEG C. Since the aromatic ring hydrocarbon has a benzene ring structure and a high hydrocarbon ratio, a carbon-like carbon film having a high content of sp3 and a low hydrogen content can be obtained when the diamond-like carbon film is grown at a high base material temperature, and the hardness of the diamond-like carbon film can be improved A problem that the diamond-like carbon film decreases in hardness in a high-temperature application environment is solved.

A melt refiner (1) which is for use in a ladling chamber (4) (holding chamber) that holds a metal melt (Y) therein and in which the metal melt is subjected to degassing and deslagging to heighten the degree of cleanliness of the metal melt and keep the amount of hydrogen gas small. With the melt refiner (1), the possibility that a slag generated is drawn up with a ladle or the like is low. The refiner is characterized by comprising: a cylindrical treating part (10) which is to be disposed in the ladling chamber (4) and has an opening (inlet hole) (13) through which the metal melt (Y) is caused to flow inward and an outlet hole (15) for discharging the melt outward; and a purifier (20) with which the metal melt (Y) inside the cylindrical treating part (10) is subjected to at least either degassing or deslagging. The refiner is further characterized in that the top of the cylindrical treating part (10) protrudes from the surface of the metal melt (Y) held in the ladling chamber (4).

The invention discloses a power system of a fuel cell car with an ultra-low-temperature cold starting function. The power system comprises a proton exchange membrane fuel cell and a lithium cell, thefeeding end of the proton exchange membrane fuel cell is connected with a power generation hydrogen input pipe and a power generation air input pipe, the power generation hydrogen input pipe is communicated with a hydrogen cylinder, the power generation air input pipe is communicated with an air compressor, a coolant circulation pipe is arranged between the feeding end and the discharging end ofthe proton exchange membrane fuel cell, an air and exhaust gas pipe, a hydrogen circulation pipe, a condensate water outer discharging pipe and a heating exhaust gas pipe are connected at the discharging end of the proton exchange membrane fuel cell, a plurality of heating units are arranged in the proton exchange membrane fuel cell, each heating unit is arranged between one pair of adjacent mono-cells, an exhaust gas heat insulation pipe is arranged outside the lithium cell, and the heating exhaust gas pipe is communicated with the input end of the exhaust gas heat insulation pipe. The powersystem has the advantages that the system can be started at the ultra-low temperature, hydrogen consuming amount of the system is low when cold starting of the system is implemented, the cold starting time is short, and the system is good in running stability.

The invention relates to a calculating method of the volume of a hydrogen storage tank in a hydrogen cyclic fatigue test system. The calculating method comprises the steps of calculating the volume ofa high-pressure storage tank and calculating the volume of a low-pressure storage tank. By means of the calculating method of the volume of the hydrogen storage tank in the hydrogen cyclic fatigue test system, the minimum volumes of the high-pressure storage tank and the low-pressure storage tank in the hydrogen cyclic fatigue test system can be calculated, it is achieved that the hydrogen use amount in a hydrogen cyclic fatigue test is minimum on the condition of guaranteeing the normal run of the hydrogen cyclic fatigue test to improve the test safety, and besides, the running cost of the test is lowered.

The invention discloses a cracked gas compression interstage selective hydrogenation method, belonging to the selective hydrogenation technical field. Aiming at reducing energy consumption and cocking of separation and hydrogenation flows in ethylene unit while reducing energy consumption and coking of cracked gas compressing machine stage and improving application universality and easy operationof the method, mixed phase hydrogenation reaction is carried out between stages of cracked gas compression machine, compressed condensate is taken as liquid phase material flow, hydrogenation is carried out under the presence of catalyst to reduce alkyne and dialkene content in cracked gas, and the material after hydrogenation is cooled and fed into the suction tank at a fourth compression stage.The method of the invention reduces high unsaturated hydrocarbon while consuming part of hydrogen, thus not only reducing energy consumption and coking amount of separation and hydrogenation flows but also reducing coking and energy consumption of compression stage. The method of the invention has wide application and can be used in various cracking separating flows.

The invention relates to a process for supercritical CO2 hydrogenation based on amorphous alloy. The method comprises the following steps: mixing a solvent and organic amine in a reaction kettle to form a solution, selecting amorphous alloy as a catalyst, adding H2 and CO2 at a low temperature, heating the mixture until the partial pressure of CO2 reaches a supercritical state, and carrying out areaction in the state to obtain the products, formic acid and alkane compound. Compared with the prior art, the low hydrogen-carbon ratio and the low reaction temperature are different from those of atraditional CO2 hydrogenation catalytic reaction system, and more H2 energy consumption and temperature cost are saved.

The invention discloses a hydrogen production method, a hydrogen production system, and a circulating method and circulating device of hydrogen production electrolyte. The circulating method comprises an oxygen side electrolyte circulating method and/or a hydrogen side electrolyte circulating method. The oxygen side electrolyte circulating method comprises the following steps: carrying out gas-liquid separation on a gas-liquid mixture discharged from the oxygen side of an electrolytic bath to obtain an oxygen side separated electrolyte; carrying out depressurization gas-liquid separation on the oxygen side separated electrolyte to obtain oxygen side depressurization separated electrolyte; and boosting the oxygen side depressurization separated electrolyte and inputting the oxygen side depressurization separated electrolyte into an electrolytic bath. The hydrogen side electrolyte circulating method comprises the following steps: carrying out gas-liquid separation on a gas-liquid mixture discharged from the hydrogen side of the electrolytic bath to obtain a hydrogen side separated electrolyte; carrying out depressurization gas-liquid separation on the hydrogen side separated electrolyte to obtain a hydrogen side depressurization separation electrolyte; and boosting the hydrogen side depressurization separation electrolyte and inputting the electrolyte into the electrolytic cell. According to the circulating method, the purity of hydrogen and oxygen obtained by hydrogen production through water electrolysis can be improved, and high system pressure can also be guaranteed.

The invention is mainly applied to the technical field of furnace pipe heating, and in particular, relates to a cracking furnace pipe in-situ coating treatment heat treatment furnace. The cracking furnace pipe in-situ coating treatment heat treatment furnace comprises a bottom frame, wall plates and a top cover plate to form a furnace cavity; portal frames are distributed in the furnace cavity; the portal frames are mounted on the bottom frame; two layers of cross beams are arranged on the portal frames; bottom electric heating chips are arranged between the adjacent portal frames, and are fixed on the bottom frame; the periphery of the bottom frame is the wall plates; the top cover plate is arranged at the tops of the wall plates; the wall plates on the front and back two sides and the top cover plate are provided with fire observing holes; staff access ports and process pipe outlets are respectively formed in the wall plates at the left and right two ends; and thermocouples, electric wire sleeves and side electric heating chips are respectively arranged on the inner sides of the wall plates on the front and back two sides. The cracking furnace pipe in-situ coating treatment heat treatment furnace can be used for heat treatment of pressure containers, can perform the heat treatment for equipment with different lengths and specifications through such forms as adding of separation plates and heightening, and can achieve multiple purposes.