84 results about "Carbon dioxide partial pressure" patented technology

The invention belongs to gas separation field, which proposes a method for eliminating carbon dioxide from gas with compound ammonia liquid. It uses a kind of compound ammonia liquid as the absorbent, the whole ammonia density in the absorbent accounts for 20%-60% according to the weight percentage. When the partial pressure of carbon dioxide in the gas is 0.1MPa-0.25Mpa, the absorbing content is large; the purification is high, and energy-saving.

A carbonitriding method that can improve the nitrogen permeating rate to render the carbonitriding process effective includes an atmosphere control step (50), and a heating pattern control step (60). The atmosphere control step (50) includes an undecomposed NH3 partial pressure control step (51), and a CO / CO2 partial pressure control step (53). The undecomposed NH3 partial pressure control step (51) and the CO / CO2 partial pressure control step (53) are carried out in the atmosphere control step (50) such that ac* defined by the following equation (1) is at least 0.88 and not more than 1.27, and α defined by equation (2) is at least 0.012 and not more than 0.020, where PN is the undecomposed ammonia partial pressure and PH is the hydrogen partial pressure in the heat treatment furnace, whereinac*=(Pco)2K×Pco2(1)PCO: partial pressure of carbon dioxide (atm), PCO<sub2>2< / sub2>: partial pressure of carbon dioxide (atm)K: equlibrium constant at <C>+CO22COα=PN0.006×(PH)32×(1.877-1.055×ac*)100(2)

Belonging to the technical field of oil-gas field chemical agents, the invention relates to a foaming drainage agent for gas well drainage gas recovery. The foaming drainage agent for gas well drainage gas recovery is formed by mixing of a gemini surfactant, a zwitterionic surfactant, a high-bond energy surfactant and a macromolecular polymer. The foaming drainage agent provided by the invention has high temperature environment resistance (up to 180DEG C), suitability to environment with wide pH value (of 1-10), high mineralization degree resistance (greater than or equal to 320000mg / L), and resistance to hydrogen sulfide and carbon dioxide atmosphere (with the hydrogen sulfide partial pressure being greater than or equal to 25% and the carbon dioxide partial pressure being greater than or equal to 20%). And the foaming drainage agent also has the advantages of excellent foaming performance, good foam stability, good water-carrying effect, low surface tension, and foam volume mostly higher than 8 times.

A process of production for producing a high strength galvannealed steel sheet by a hot-dip galvanized steel sheet production equipment using an all radiant tube type annealing furnace and a production equipment for the same are provided, comprising continuously hot-dip galvanizing a high strength steel sheet having a content of Si of 0.4 to 2.0 wt % during which making the atmosphere of the reducing zone an atmosphere containing H2 to 1 to 60 wt % and comprised of the balance of N2, H2O, O2, CO2, CO, and unavoidable impurities, controlling the log(PCO2 / PH2) of the carbon dioxide partial pressure and hydrogen partial pressure in the atmosphere to log(PCO2 / PH2)≦−0.5 and the log(PCO2 / PH2) of the water partial pressure and hydrogen partial pressure to log(PH2O / PH2)≦−0.5, and controlling the log(PT / PH2) of the total partial pressure PT of the carbon dioxide partial pressure PCO2 and water partial pressure PH2O and the hydrogen partial pressure to −3≦log(PT / PH2)≦−0.5.

Functionalized metal-organic framework adsorbents with ligands containing basic nitrogen groups such as alkylamines and alkyldiamines appended to the metal centers and method of isolating carbon dioxide from a stream of combined gases and carbon dioxide partial pressures below approximately 1 and 1000 mbar. The adsorption material has an isosteric heat of carbon dioxide adsorption of greater than −60 kJ / mol at zero coverage using a dual-site Langmuir model.

The invention provides a method for monitoring leakage in an on-orbit state for a spacecraft. The method comprises the following procedures of: monitoring pressure after partitioning cabins; injecting a neon gas in a capsule, and balancing; performing sampling analysis; performing mass flow analysis; and calculating a leak rate. According to the method provided by the invention, a pressure change monitoring method, a mass spectrum analysis method and a mass flow method are comprehensively applied to calculation and analysis of the leak rate of a space station in the on-orbit state comprehensively; the gas temperature inside the capsule is measured, as well as the changes of the total pressure, the oxygen partial pressure, the carbon dioxide partial pressure and the water vapor partial pressure are measured when the pressure is monitored; a pressure change monitoring system is used for monitoring the pressure change quantity in the capsule by comprehensively using pressure parameters measured by an environmental control and life support system; and the leak rate of a capsule body is accurately calculated by applying the mass spectrum analysis method and the mass flow method.

The device (100) has control circuits (124,124a) to measure blood buffer parameter of measuring unit selected from group consisting of bicarbonate concentration and carbon dioxide partial pressure. The measured value of blood buffer parameter signal is supplied to control device (125) to regulate actual value of blood buffer parameter to preset value range. The pH measuring unit (150a) is provided in upstream of dialysis unit (105) to supply pH value signal to alarm unit (130) to trigger alarm signal exceeding or falling below specific pH range.

The invention relates to a method for operating a gas scrubbing plant, wherein a feed gas (1) containing hydrogen, carbon monoxide, carbon dioxide and carbonyl sulphide and / or hydrogen sulphide is scrubbed in a scrubbing facility (A1) by a scrubbing agent (3, 4) pre-charged with carbon dioxide in order to largely remove the sulphur components selectively from the feed gas and produce a desulphurised gas stream (5, 9). The invention is characterised in that a sulphur-free scrubbing agent (3, 4) is used that has a carbon dioxide partial pressure upon its introduction into the scrubbing facility (A1) which is greater than or equal to the carbon dioxide partial pressure in the feed gas (1) to be desulphurised.

The invention discloses a nitrogen-phosphorus high-efficiency expansion type wood flame retardant. The urea phosphate crystallization mother liquor is taken as a raw material, and Fe, Mg, Ca, Al metal ion activators and boric acid are added to stir evenly, and then put into a vacuum distillation device , heated in a water bath at 80°C-90°C, after vacuum distillation for 1.5-2h, the water content of the mother liquor is less than 8%; put the crystallized mother liquor after dehydration into a polymerization reactor equipped with an electric stirrer, turn on the electric stirrer and Heating switch, heat at a rate of 4-6°C / min, and adjust the speed of the electric mixer at a lower speed of 150rpm. Through the gas cylinder, feed two kinds of gases into the reaction kettle with the partial pressure of ammonia at 0.4-0.7MPa and the partial pressure of carbon dioxide at 0.3-0.6MPa, and keep the total pressure in the reaction kettle at 1.2-1.4MPa. When the reaction temperature reaches 160-220℃ , keep the reaction temperature for 1.5-2.5h, and after the reaction ends, the product is lowered to normal temperature, and then pulverized to obtain the flame retardant powder. It has the characteristics of simple process and easy industrialization, low cost, less investment, short treatment cycle, reasonable ratio of nitrogen and phosphorus, good synergistic flame retardant effect, clean and pollution-free.

Combining controlled open-ocean iron enrichment with a system for collecting the ensuing biological growth can lead to a fundamental shift towards using marine biomass feedstock for large-scale global biodiesel production. The literature review reveals that open-ocean enrichment effectively reduces both the atmospheric carbon dioxide partial pressure and ocean acidity. A semi-closed ocean system is provided that allows for the efficient cultivation and harvesting of a high tonnage biomass feedstock generated by iron fertilization. The concept methodically capitalizes on the ocean's free nutrients, kinetic / potential energy, and expansive surface area to ensure that the mass, energy, and cost balance equations favor our system while taking care to preserve the ocean's ecosystem. The system is modular, portable, easily scalable system, and minimizes waste. In addition to the above benefits, our concept allows continued adherence to the NEPA and London Protocol by culling the biomass produced by fixing carbon dioxide and limiting iron exposure to the vessel's interior.

The Portable Unit for Metabolic Analysis measures human metabolic function. The compact invention attaches to the face of a subject and it is able to record highly time-resolved measurements of air temperature and pressure, flow rates during inhalation and exhalation, and oxygen and carbon dioxide partial pressure. The device is capable of ‘breath-by-breath’ analysis and ‘within-breath’ analysis at high temporal resolution.

#CMT# # / CMT# The method involves arranging compressor (1) with annular entry surface, two burners, combustion chambers (14,15) and high-pressure turbines (16,17). The oxygen-reduced gas (21) and sucking-in fresh air (2) are supplied alternately to the compressor. The oxygen concentration of the oxygen-reduced gas is smaller than the oxygen concentration of sucking-in fresh air of compressor. The flow channel of the compressor is attached with compressor intake (3) having two sections (51,52) arranged alternately in circumferential direction. #CMT# : # / CMT# An independent claim is included for gas turbine electric power plant. #CMT#USE : # / CMT# Method for operating gas turbine in gas turbine electric power plant (claimed). #CMT#ADVANTAGE : # / CMT# The carbon dioxide partial pressure in the exhaust gases can be increased so as to reduce the power losses and efficiency losses of electric power plant. The oxygen contents in the sucking in gases from gas turbines can be reduced to reduce the nitrous oxide emissions. The operability of the gas turbine can be improved with prolonged service life and efficient cleaning function. #CMT#DESCRIPTION OF DRAWINGS : # / CMT# The drawing shows a schematic view of the gas turbine electric power plant. 1 : Compressor 2 : Sucking-in fresh air 3 : Compressor intake 14,15 : Combustion chambers 16,17 : High-pressure turbines 21 : Oxygen-reduced gas 51,52 : Sections.

The invention describes a new device for the measurement of the partial pressure of carbon dioxide. The device is based on a simple construction and can be manufactured in a cost effective way. The pH dependency of the redox potential of organic substances is used to determine an electrical characteristic that depends on the partial pressure of carbon dioxide. The device for the potentiometric determination of the partial pressure of carbon dioxide consists of a housing with an opening for the entrance for gases, a gas permeable membrane, an electrolyte, at least one redox and one reference electrode with electrode contacts that transmit the electrode potential outwards through the housing. The gas permeable membrane has an electronically conductive layer that works as a redox electrode for a pH dependent redox system. The pH dependent redox system is adsorbed, absorbed or chemically bound onto the electronically conductive layer and interacts electrochemically with the electrode such that the pH dependent redox potential adjusts at the electrode according to the present partial pressure of carbon dioxide.

The invention relates to the field of medical equipment, and discloses a hydrophobic three-dimensional porous material, a preparation method and application thereof and a blood storage bag. The preparation method of the hydrophobic three-dimensional porous material comprises the steps that (1) a porous structure sugar template is prepared from water-soluble sugar; (2) polydimethylsiloxane is poured into the porous structure sugar template and solidified; and (3) the porous structure sugar template in a solid material obtained in step (2) is removed. The preparation method of the hydrophobic three-dimensional porous material is easy to operate and low in cost, and no organic solvent residue exists in the prepared hydrophobic three-dimensional porous material; and the hydrophobic three-dimensional porous material prepared through the preparation method of the hydrophobic three-dimensional porous material is of an irregular pore structure and is used for remarkably increasing the oxygen partial pressure of a blood sample in the blood storage bag, decreasing the carbon dioxide partial pressure and improving deformability of erythrocytes.

The invention comprises a method for reducing the amount of carboxylic acids in petroleum feeds comprising the steps of (a) adding to said petroleum feed a catalytic agent comprising an oil soluble or oil dispersible compound of a metal selected from the group consisting of Group VB, VIB, VIIB and VIII metals, wherein the amount of metal in said petroleum feed is at least about 5 wppm, (b) heating said petroleum feed with said catalytic agent in a reator at a temperature of about 400 to about 800 DEG F (about 204.44 to about 426.67 DEG C) and a pressure of about atmospheric to about 1000 psig (about 6996.33 kPa) in the substantial absence of hydrogen, and (c) sweeping the reactor containing said petroleum feed and said catalytic agent with an inert gas to maintain the combined water and carbon dioxide partial pressure below about 50 psia (344.75 kPa).

Functionalized metal-organic framework adsorbents with ligands containing basic nitrogen groups such as alkylamines and alkyldiamines appended to the metal centers and method of isolating carbon dioxide from a stream of combined gases and carbon dioxide partial pressures below approximately 1 and 1000 mbar. The adsorption material has an isosteric heat of carbon dioxide adsorption of greater than −60 kJ / mol at zero coverage using a dual-site Langmuir model.

The present invention provides a method of treating wastewater containing phosphorus and / or nitrogen for removing phosphorus and / or nitrogen from the wastewater, including following steps of: (a) introducing wastewater containing phosphorus and / or nitrogen into a an anaerobic reactor, treating the introduced wastewater with anaerobic microorganisms, to produce biogas from organic matters in the wastewater, and then discharging the treated wastewater saturated with carbon dioxide under carbon dioxide partial pressure of 0.2 to 0.5 atm; and (b) injecting the treated wastewater of step (a) into a carbon dioxide stripping apparatus wherein the wastewater is free-fallen to expose the wastewater to ambient condition with carbon dioxide partial pressure of less than 0.001 atm so that carbon dioxide stripping takes place and increase in pH occurs without addition of alkaline substance, and then providing proper pH of 8.4 to 9.6 to form struvite.

The invention discloses a patient sign monitoring system which is characterized by comprising a body temperature sensor, a heart rate sensor, a pulse oximeter and a carbon dioxide partial pressure sensing film, wherein the body temperature sensor, the heart rate sensor, the pulse oximeter and the carbon dioxide partial pressure sensing film are respectively connected with a wireless signal transmitting device; a wireless signal receiving device matched with the wireless signal transmitting device is arranged on a far-end personal computer (PC); and the PC is provided with a display device and an alarm device. The patient sign monitoring system is capable of detecting the body temperature, the heart rate, the blood oxygen saturation degree and the carbon dioxide partial pressure value of a patient in real time, and sending the results into the PC arranged in a nurse station in a way of wireless transmission, thus helping nurses or related doctors to respond the change of the body temperature of the patient in time.

The present invention relates to a medical solution, a method for producing said medical solution, a multi-compartment bag containing the medical solution as well as use of said medical solution. According to the invention the medical solution comprises a first single solution comprising bicarbonate and carbonate in such proportions that the partial pressure of carbon dioxide, CO2, in the first single solution is of the same order of magnitude as the partial pressure of carbon dioxide, CO2, of the atmosphere. The medical solution further comprises a second single solution comprising an acid. Said first and second single solutions are, after terminal sterilization and up on use, to be mixed to form a final solution. Said second single solution has a pH of 1.0-1.5, and said final solution has a pH of 7.0-7.6.

The invention relates to medical instruments, in particular to a tracheal catheter capable of directly monitoring the end-tidal carbon dioxide partial pressure of an infant. The tracheal catheter comprises a catheter body, a cuff, a connector, an opening and a thin tube, wherein the cuff is connected to one end of the catheter body, the connector is arranged at the other end of the catheter body, the opening is arranged in a position, between the cuff and the connector and close to the cuff, of the catheter body and connected with the thin tube, and the tail end of the thin tube is connected with an end-tidal carbon dioxide monitor. The tracheal catheter has the advantages that the tracheal catheter is improved to solve the technical problem that due to the fact that the infant is low in body weight, if an existing tail-end sampling device is used, the dilution effect of fresh air flow in the tracheal catheter on carbon dioxide is evident, and the measured end-tidal carbon dioxide is evidently lower than an actual value, the sampling part opening 1 is close to the top end of the tracheal catheter, the inner diameter of the thin tube 2 is small, the fresh air quantity in the thin tube 2 is low, influence of the fresh air flow on the collected breathing gas at the top end of the tracheal catheter is small, the end-tidal carbon dioxide level can be reflected accurately, and the tracheal catheter is evident in use effect.

The invention relates to the field of ocean-atmosphere measurement, in particular to a watertight anti-pressure storehouse body for measuring ocean-atmosphere carbon dioxide flux. The storehouse body comprises a lower storehouse body and an upper storehouse body, wherein the lower storehouse body is arranged on the lower half part of the watertight anti-pressure storehouse body; the upper storehouse body is arranged on the upper half part of the watertight anti-pressure storehouse body; and a carbon dioxide partial pressure optical fiber chemical sensor sample cell, which is connected with the upper and lower storehouse bodies respectively, of an atmosphere passage, a carbon dioxide partial pressure optical fiber chemical sensor sample cell, which is connected with the upper and lower storehouse bodies respectively, of an ocean passage, and an electrical connecting passage which is connected with the upper and lower storehouse bodies respectively are arranged between the lower storehouse body and the upper storehouse body. The watertight anti-pressure storehouse body designed by the invention has a compact and simple structure, is convenient to mount, has high sealability and pressure resistance, can be sequentially released for a long time, and is suitable for an anchoring platform and an ocean-atmosphere CO2 flux measuring instrument which adopts CO2 partial pressure opticalfiber chemical sensors.

A carbonitriding method that can improve the nitrogen permeating rate to render the carbonitriding process effective is directed to carbonitriding a workpiece formed of steel that contains at least 0.8 mass % of carbon by heating in an atmosphere including ammonia, carbon monoxide, carbon dioxide and hydrogen. The method includes an atmosphere control step (50), and a heating pattern control step (60). The atmosphere control step (50) includes an undecomposed NH3 partial pressure control step (51), a CO / CO2 partial pressure control step (53), and an H2 partial pressure control step (52). The undecomposed NH3 partial pressure control step (51), the CO / CO2 partial pressure control step (53) and the H2 partial pressure control step (52) are carried out such that the partial pressure of hydrogen in the heat treatment furnace is at least 0.1 atmospheric pressure and not more than 0.3 atmospheric pressure, and gamma defined by the following equation (1) is at least 2.0 and not more than 6.0, in the atmosphere control step (50). gamma = a c * C NH 3 ( 1 ) where a c * = ( Pco ) 2 K x Pco 2 ( 2 ) PCO: partial pressure of carbon monoxide (atm); PCO<sub2>2< / sub2>: partial pressure of carbon dioxide (atm), K: equilibrium constant at <C>+CO2 2CO; CNH<sub2>3< / sub2>: undecomposed ammonia concentration (volume %)

The invention discloses a liquefaction process method and a device capable of adjusting carbon dioxide concentration and used for separating carbon dioxide from biogas, wherein the biogas is subjected to dehydration and desulfurization pretreatment and then is subjected to multi-stage compression until the partial pressure of carbon dioxide in the biogas reaches 6.5 MPa and a critical state at the temperature of less than or equal to 25 DEG C is reached, and then the biogas is cooled to the temperature of less than 25 DEG C through a condenser; and carbon dioxide gas in the biogas is liquefied, separated and recycled. Moreover, the concentration of the carbon dioxide is increased by arranging bypass adjustment, and the partial pressure of the carbon dioxide is ensured to be 6.5 MPa or above, so that the carbon dioxide is liquefied at the normal temperature of 25 DEG C and is convenient to store. After the liquid carbon dioxide is separated, the remaining gas is pressurized and purified to obtain high-concentration methane. According to the method and the device, the content of methane separated from the biogas can reach 98% or above, the purity of carbon dioxide gas liquefied at normal temperature through pressurization can reach 98% or above through purification and enrichment, the method and the device are suitable for large-scale continuous production, the system is simple in structure, continuous and convenient to operate, energy consumption is reduced, and the method and the device have wide technical application prospects.

The invention discloses a solar power generation system. The solar power generation system is provided with a medium flowing path for accommodating a medium to circulate in the solar power generationsystem, the medium flow path comprises a first circuit and a second circuit, a pressure adjusting unit communicates with the first circuit and the second circuit, the pressure adjusting unit can stabilize the air pressure in the first circuit below a specified threshold value by conveying the medium in the first circuit to the second circuit. According to the solar power generation system, the high-density energy storage and high-efficiency heat exchange can be achieved, the partial pressure of carbon dioxide in the process of heat storage and release can be adjusted through the energy storagemode of a solar chemical heat pump, so as to upgrade the medium-temperature energy storage to the high-temperature energy storage with high application value, the overall efficiency is improved, andthe system cost is lowered.