82 results about "Carbon dioxide partial pressure" patented technology

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(P_T/PH₂) of the total partial pressure P_T of the carbon dioxide partial pressure PCO₂ and water partial pressure PH₂O and the hydrogen partial pressure to −3≦log(P_T/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 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 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 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.

The invention relates to a hyperbaric oxygen treatment device and a using method thereof, in particular to a carbon dioxide mixed oxygen hyperbaric oxygen treatment device and a using method. The device is provided with a sealed cabin body, and the cabin body is provided with a cabin pressurization valve, a cabin pressure reduction valve, a pressure sensor, a carbon dioxide concentration sensor and a controller; a cabin grounding device is arranged on the cabin body. The using method includes the steps that a patient enters the pressurized cabin body, and the cabin body is sealed; when the concentration of carbon dioxide in the cabin body reaches 1.2-2.2%, the cabin pressurization valve is switched on, oxygen is introduced for pressurizing the cabin body, and then the cabin pressurizationvalve is switched off when the pressure reaches a treatment set value; a carbon dioxide partial pressure value is detected and converted, after the set value is reached, the opening angle of the cabinpressurization valve and cabin pressure reduction valve is controlled, and oxygen is introduced for ventilation and gas exchange when the carbon dioxide partial pressure value in the cabin body is kept within a set value range and the pressure is unchanged. The device has the advantages of being simple in structure, convenient to use, capable of dilating blood vessels and improving blood circulation and blood oxygen tension of the human body, good in therapeutic effect and the like.