468 results about "Carbon dioxide content" patented technology

Disclosed herein is a system comprising a first compressor; the compressor being operative to compress air; a turbine; the turbine being disposed downstream of the first compressor; the turbine being operative to combust a hydrocarbon fuel along with compressed air from the first compressor to produce an exhaust gas stream; and a second compressor; the second compressor being disposed downstream of the turbine; the second compressor being operative to compress the exhaust gas stream and to recycle the compressed exhaust gas stream to the turbine. Disclosed herein is a method comprising compressing air in a first compressor; combusting the air along with a hydrocarbon fuel in a turbine; generating an exhaust gas stream from the turbine; compressing the exhaust gas stream in a second compressor; recirculating the compressed exhaust gas stream to the turbine; separating carbon dioxide from the exhaust gas stream; and storing the carbon dioxide.

A method for producing methanol and dimethyl ether using the air as the sole source of materials is disclosed. The invention relates to a method for separating the water (i.e., the moisture in the air) and carbon dioxide content of atmospheric air for their use in the subsequent production of methanol, dimethyl ether and derived synthetic hydrocarbons as products. The method includes the conversion of carbon dioxide and water under conditions sufficient to produce methanol and / or dimethyl ether. Methanol and / or dimethyl ether can be used as fuel or fuel additives or further converted to synthetic hydrocarbons and their products. Carbon dioxide is captured on a suitable absorbent, preferentially polyethyleneimine supported on nano-structured fumed silica. The process can also involve hydrogenation with hydrogen produced by electrolysis of water obtained from the air or from any other water source. Methanol can be dehydrated to produce dimethyl ether or further processed to produce synthetic hydrocarbons, polymers, and products derived from them by other known methods.

The device for microbiological analyses on samples of body fluids comprising: an incubation area for containers containing said samples; an analyzer for analyzing the inner atmosphere of said containers; a sorting system to sort the containers according to the carbon dioxide content detected by said analyzer.

The present invention relates to a polyether carbonate polyol made by copolymerizing a starter molecule with carbon dioxide, at a pressure ranging from about 10 psia to about 2,000 psia, and an alkylene oxide, at a temperature ranging from about 50° C. to about 190° C. and in the presence of from about 0.001 wt. % to about 0.2 wt. % of a substantially non-crystalline double metal cyanide (DMC) catalyst, wherein the polyol has an incorporated carbon dioxide content of from about 1 wt. % to about 40 wt. %, wherein the ratio of cyclic carbonate by-product to total carbonate is less than about 0.3 and wherein the weight percentages are based on the weight of the polyol. The inventive polyether carbonate polyols may find use in producing polyurethane foams, elastomers, coatings, sealants and adhesives with improved properties.

A method and system for storing and supplying hydrogen to a hydrogen pipeline in which a compressed hydrogen feed stream is introduced into a salt cavern for storage and a stored hydrogen stream is retrieved from the salt cavern and reintroduced into the hydrogen pipeline. A minimum quantity of stored hydrogen is maintained in the salt cavern to produce a stagnant layer having a carbon dioxide content along the cavern wall and the top of a residual brine layer located within the salt cavern. The compressed hydrogen feed stream is introduced into the salt cavern and the stored hydrogen stream is withdrawn without disturbing the stagnant layer to prevent carbon dioxide contamination from being drawn into the stored hydrogen stream being reintroduced into the hydrogen pipeline. This allows the stored hydrogen stream to be reintroduced into the hydrogen pipeline without carbon dioxide removal.

In a method and device for reducing the carbon dioxide content in a dead volume intended for connection to the respiratory system of a patient, and an anesthesia apparatus embodying such a device, a flow of gas is generated from an outlet associated with the dead volume and the gas is conducted through a carbon dioxide absorber, and the gas after passing through the carbon dioxide absorber is returned to an inlet associated with the dead volume.

Methods for estimating the volume of the carbon dioxide stores of an individual's respiratory tract include determining a carbon dioxide store volume at which a correlation between corresponding signals of carbon dioxide elimination and an indicator of the content of carbon dioxide in blood of the individual is optimized. The estimate of the volume of carbon dioxide stores, which comprises a model of the respiratory tract, or lungs, of the individual, may be used as a transformation to improve the accuracy of one or both of the carbon dioxide elimination and carbon dioxide content signals. Transformation, or filtering, algorithms are also disclosed, as are systems in which the methods and algorithms may be used. The methods, algorithms, and systems may be used to accurately and noninvasively determine one or both of the pulmonary capillary blood flow and cardiac output of the individual.

A fuel system comprising a fuel tank, a catalytic inerting device for producing oxygen depleted air (ODA) by reaction of fuel vapor from the fuel tank with air, and a separator device for separating carbon dioxide from the ODA gas before feeding the carbon dioxide depleted ODA gas to the fuel tank so as to render the fuel tank ullage atmosphere inert. Also, a method of reducing the carbon dioxide content of oxygen depleted air (ODA) produced by a catalytic inerting device for inerting a fuel tank ullage atmosphere, the method comprising separating carbon dioxide from the ODA gas before feeding the carbon dioxide depleted ODA gas to the fuel tank. The system may be installed in an aircraft.

A method of separating one or more light components, such as helium, from a carbon dioxide containing stream. A two-phase stream is obtained, at least in part, by cooling a pressurized feed stream to at least partially condense such stream. The stream that is subsequently degassed to produce a first vapor stream enriched in the light component(s) and a first liquid stream containing an entrained fraction of the light component(s). The first liquid stream is expanded to create another two-phase stream that is degasified to produce a second vapor stream that is also enriched in the light component(s) and a second liquid stream having an enriched carbon dioxide content. The second liquid stream is repressurized and vaporized. In case of a supercritical feed, the pressurized feed stream is expanded after having been cooled. Thereafter, the feed is degassed to produce the light component enriched vapor stream and a liquid stream enriched in the carbon dioxide. The resultant vapor streams, enriched in the light component(s) may then be further processed to isolate the light components.

Contemplated plants and methods for NGL recovery from feed gases having a carbon dioxide content equal or greater than about 2% employ temperature control configurations that allow high-level and flexible recovery of ethane and heavier components while avoiding freezing of the carbon dioxide in the process. Where the feed gas has a significant fraction of C3+ components and moderate carbon dioxide content, a single column configuration with an intermediate reflux condenser may be used, while two-column configurations may be used for feed gases with high carbon dioxide content and relatively low C3+ component concentration.

A decanter for consuming and tasting drinks such as beer has a plurality of raised ribs (11) inside it, extending from the base (12) towards the mouth (5) of the decanter (1) and evenly distributed radially or in a helical or spiral arrangement; a decanter (1) with such ribs (11), held at an angle during filling and rotated during and after filing, allows the drink to be subjected to a whirling motion, with consequent partial elimination of the carbon dioxide and enhancement of the organoleptic properties of the beer.

The invention discloses a one-stage hydrogen separating and purifying method based on a pressure swing adsorption membrane and a device for realizing the same. The method comprises the following steps of: a, adsorption, wherein feed gas with hydrogen content of 75%, carbon dioxide content of 24.5%, carbon monoxide content of 0.5% and pressure of 1.2Mpa is fed into an adsorption tower, a hydrogen purification adsorbent filled in the adsorption tower adsorbs the carbon dioxide and the carbon monoxide in the feed gas, effective gas component hydrogen is output from the top of the adsorption tower, and the product hydrogen is sent to a user from the device through an outlet valve; and b, regeneration, wherein after the feed gas is adsorbed in the adsorption tower, equalized pressure drop and inverse discharge are performed on the adsorption tower, inversely discharged gas enters into a membrane separation unit, infiltration gas is stored in a buffer tank and then returned into the evacuated adsorption tower, and finally equalized pressure increasing and final charge are performed on the adsorption tower. By utilizing the process, the size of a pressure swing adsorption device can be reduced, the hydrogen yield is improved, and the cost is lowered.

The present invention relates to a method for the production of stable humus- and nutrient-rich and water-storing soil substrates with properties of anthropogenic soil types (Terra Preta) in which pyrogenic carbon, organic biomass, and / or natural mineral materials are used as initial materials in a fermentation process. The soil produced or treated according to the invention leads to a sustainably high soil yield such that mineral fertilizers are no longer needed for agricultural use. Moreover, the soil is suitable for use as a soil substitute, for use as a soil supplement, for greening developments, for preventing erosion, for improving regional water supplies, for preventing floods, for preventing climate change, for reducing carbon dioxide content in the atmosphere, for waste water cleaning and treatment, for exhaust air cleaning and building air purification, for creating material flow cycles from biogenic waste and / or waste water in order to develop and utilize land use and development systems.

A method and system for storing and supplying hydrogen to a hydrogen pipeline in which a compressed hydrogen feed stream is introduced into a salt cavern for storage and a stored hydrogen stream is retrieved from the salt cavern and reintroduced into the hydrogen pipeline. A minimum quantity of stored hydrogen is maintained in the salt cavern to produce a stagnant layer having a carbon dioxide content along the cavern wall and the top of a residual brine layer located within the salt cavern. The compressed hydrogen feed stream is introduced into the salt cavern and the stored hydrogen stream is withdrawn without disturbing the stagnant layer to prevent carbon dioxide contamination from being drawn into the stored hydrogen stream being reintroduced into the hydrogen pipeline. This allows the stored hydrogen stream to be reintroduced into the hydrogen pipeline without carbon dioxide removal.

A method for food fresh-keeping and the fresh-keeping refrigerating room, comprising the refrigerating, humidifying and deoxidation the food in the refrigerating room; the said deoxidation step is: removing the oxygen in the air when the oxygen concentration amounting to a certain value and then loading the food into the refrigerating room; and the said humidifying step is: humidifying the air when the degree of humidity is under a certain value. The fresh-keeping by this method and in this refrigerating room can maintain for a long time for the proper value of the oxygen content, humidity, temperature and carbon dioxide content in the refrigerating room air, particularly by humidifying at a low temperature can reach a good humidifying effect in the refrigerating room with a low temperature, solving the problem existing in the humidifying for a long time; furthermore, the deoxidation cost can be deduced largely by burning to remove oxygen. The device is most suitable for the Sea Island and ocean-going ship for transport which demands the food fresh-keeping.

The invention discloses a two-phase carbon dioxide collecting device which belongs to the technical field of flue gas cleaning treatment. Compared with the conventional collecting device, the two-phase carbon dioxide collecting device is additionally provided with a separator, wherein an absorbent solution in the separator is separated into two liquid phases, of which the carbon dioxide contents are obviously different; upper layer liquid is separated from lower layer liquid by standing, performing rotary centrifugal separation or filtering; and the upper layer liquid is directly recycled, and the lower layer liquid is conveyed into an absorption tower for regeneration. By adoption of the two-phase carbon dioxide collecting device, the energy consumption by a chemical absorption method for collecting the carbon dioxide is greatly reduced, and then the cost for large-scale application of the technology is reduced.

The invention discloses a low-pressure gasification system, which comprises a coal slurry supply unit, a low-pressure water-cooled wall gasifier and a synthesis gas washing unit, wherein the low-pressure water-cooled wall gasifier comprises a gasification chamber used for gasifying water coal slurry and a quenching chamber adjacently arranged below the gasification chamber to quench combustion products produced in the gasification chamber and obtain crude synthesis gas; the synthesis gas washing unit is connected to the quenching chamber and is used for washing the crude synthesis gas to generate synthesis gas; the gasification chamber is communicated with the quenching chamber through a downcomer; an ascending pipe sleeve is arranged on an outer wall of the downcomer; and quenching wateris introduced into the ascending pipe sleeve and sprays from the upper end of the ascending pipe sleeve so as to cool the combustion products. Due to the low-pressure gasification system, the carbon dioxide content in the generated synthesis gas is greatly reduced, so that decarbonizing equipment in a synthesis ammonia device can be reduced when the synthesis gas enters a downstream process. Therefore, the energy consumption in the whole downstream process is greatly reduced, the cost is reduced, and the coal types are little limited. The invention also provides a gas making method.

The invention discloses a horizontal-type solid fermentation tank and fermentation method for Pu-erh tea. The fermentation tank comprises a tank body supported by a tank body support, and a clamp jacket is installed outside the tank body; the top of the tank body is provided with feed inlets, exhaust ports, diversion plates connected with heating wires, a water inlet and a water replenishing and inoculation opening; the bottom of the tank body is provided with a discharge outlet, a water vapor inlet, a sterile air inlet, a carbon dioxide inlet, a drying ventilation opening and a water outlet, and a stirring system is further arranged in the tank body. According to the fermentation method, a traditional Pu-erh tea pile-fermentation technology is changed, production standardization and specification rationalization of the Pu-erh tea are achieved on the condition that fermentation conditions such as microorganism species, tidal prism, temperature, fermentation time, inoculated-pathogen quantities and oxygen and carbon dioxide content of the Pu-erh tea are comprehensively considered, the fermentation process of the Pu-erh tea is artificially controllable, and the quality of the Pu-erh tea is more stable, safer and more controllable.

The invention discloses a test method of supercritical carbon dioxide content in coal. A determination device consisting of a vacuum pump, a coal sample tank, a carbon dioxide cylinder, a pressure device and a high-accuracy balance is used in the test method. The test method comprises the following steps of calculating the quantity of gas filled into an adsorption tank by measuring the mass variation of the adsorption tank, substracting the gas phase content increased in a free space of the adsorption tank to obtain the excess adsorption quantity of a coal sample under balance pressure, and calculating the gas phase carbon dioxide content in a coal pore by utilizing a non-ideal gas equation according to the pore pressure. The supercritical carbon dioxide content in coal is a sum of the excess adsorption quantity and the gas phase content of the pore space in coal, tests of a plurality of balance pressures can be finished by measuring carbon dioxide contents in the coal sample under different balance pressures. The test method has the advantages of simpleness and low requirement to an instrument and equipment, can accurately and conveniently measure the carbon dioxide content in coal and is beneficial to test research on the carbon dioxide content in coal.

The invention discloses a gamma-aminobutyric acid-containing milk beverage and a production method thereof. 100g of the gamma-aminobutyric acid-containing milk beverage comprise 7 to 83g of milk, 6.0 to 10.0g of sugar, 0.06 to 0.7g of one or more stabilizing agents, 0.2 to 0.5g of one or more acidity conditioning agents, 0.04 to 0.15g of flavoring essence, 0.1 to 5g of gamma-aminobutyric acid and the balance water. Carbon dioxide gas is fed into the gamma-aminobutyric acid-containing milk beverage and thus a carbon dioxide content of the gamma-aminobutyric acid-containing milk beverage is in a range of 1.5 to 3g / 100g.

The invention relates to a device for determining two or more respiratory parameters relating to an individual and a method for determining two or more respiratory parameters relating to an individual by means of the device. The disclosed device and method may be used in an individual suffering from pulmonary gas exchange problems relating to gas exchange of oxygen and / or carbon dioxide, e.g. a patient with chronic obstructive pulmonary disease. The device and method may also be used in a healthy individual or in an animal, e.g. for research experiments. The device has detection means for oxygen and carbon dioxide contents in inspired and expired gas and blood. The device is controlled by a computer with functionality for entering oxygenation, carbon dioxide and acid-base values from one or more blood samples from arterial, venous, central venous or mixed venous blood samples, and with the parameter estimation based on equations of gas exchange of both oxygen and carbon dioxide and equations describing the acid-base chemistry of blood potentially including the competitive binding of oxygen and carbon dioxide to hemoglobin.

The invention discloses a variable air volume (VAV) energy-saving control system for a central air-conditioner. The system comprises a master control cabinet, an air supply unit, air ducts, variable air volume (VAV) adjusting valves, indoor controllers and a monitoring system, the air supply unit comprises a frequency converter, a surface air cooler, a heater and a draft fan, a fresh air inlet provided with a fresh air valve and an air supply outlet are formed in an air supply duct, an air return duct is connected with the air supply duct through a fourway pipe provided with a proportion adjusting valve, and the monitoring system comprises an air supply pressure detector, a static pressure detector, an air return temperature detector, an indoor temperature detector and a carbon dioxide content detector. The control system can be set according to different users, local temperature can be changed, indoor air can be circulated continuously through the air return duct, the consumption amount of thermal energy or cold energy is reduced, and resource waste is decreased; in addition, according to the indoor carbon dioxide content detector, the master control cabinet adjusts the opening of the proportion adjusting valve and the opening of the fresh air valve, the fresh air inlet amount and air exhaust amount can be adjusted, the comfort degree of a user is raised, and meanwhile the energy dissipation is decreased to the greatest extent.

The invention provides a pig-keeping system capable of intelligently monitoring environments, and a monitoring method thereof. The pig-keeping system comprises a microcontroller in connection with a clock module; the microcontroller is in connection with temperature and humidity sensors for monitoring pig house environments, and ammonia gas, hydrogen sulfide and concentration detection sensors; the microcontroller is also in connection with a drawing fan, a purge valve, an infrared lamp, and forage feed and drinking-water valve control relays. Each relay is in connection with associated facilities. The monitoring method comprises: the microcontroller storing ammonia gas, hydrogen sulfide and carbon dioxide content set values, temperature and humidity set values, cleaning time, and feeding and water supply time; and starting associated relays to perform cleaning, exhausting, heating, humidification, food and water supply, etc. according to set parameters. The pig-keeping system can monitor independently, operate efficiently, save manpower and resources, guarantee sanitation, reduce costs, and improve farming efficiency; a plurality of systems are in wireless connection with a host computer to accept technical guidance and to boost a management level; set parameters of each system can be automatically adjusted, or controlled by the host computer.

A blood treatment method is described that is adapted to at least partially eliminate the carbon dioxide content of the type comprising a step of drawing a blood flow. Advantageously according to the invention, the method further comprises the steps of: acidifying the blood flow with transformation of the related blood bicarbonate content into gaseous carbon dioxide; and eliminating the gaseous carbon dioxide content by means of a pressure gradient.

Methods for estimating the volume of the carbon dioxide stores of an individual's respiratory tract include determining a carbon dioxide store volume at which a correlation between corresponding signals of carbon dioxide elimination and an indicator of the content of carbon dioxide in blood of the individual is optimized. The estimate of the volume of carbon dioxide stores, which comprises a model of the respiratory tract, or lungs, of the individual, may be used as a transformation to improve the accuracy of one or both of the carbon dioxide elimination and carbon dioxide content signals. Transformation, or filtering, algorithms are also disclosed, as are systems in which the methods and algorithms may be used. The methods, algorithms, and systems may be used to accurately and noninvasively determine one or both of the pulmonary capillary blood flow and cardiac output of the individual.

In a method for continuous and non-invasive determination of the effective lung volume, the cardiac output, and / or the carbon dioxide content of venous blood of a subject during a sequence of respiratory cycles, the inspiratory and expiratory flow, and the carbon dioxide content of at least the expiration gas are measured. In each respiratory cycle, a first parameter related to the subject's fraction of alveolar carbon dioxide, a second parameter related to the carbon dioxide content of the subject's arterial blood, and a third parameter related to the subject's carbon dioxide elimination are determined based on the measured inspiratory flow, expiratory flow and carbon dioxide content. The effective lung volume, the cardiac output, and / or the carbon dioxide content of venous blood of the subject is determined based on the correlation of the first, second and third parameters.

The invention discloses an asphyxia prevention intelligent control system for an automobile, and the system is an intelligent control device for preventing a child from being asphyxial when the childstays and sleeps in the automobile while an air conditioner of the automobile is turned on during parking. The control system includes a vehicle speed detecting module, a vital sign detecting module,an air temperature detecting module, a signal processing module, an alarm module, and a safety measure module. When the vehicle speed detecting module detects that a vehicle speed is zero, the vital sign detecting module starts to detect whether there is a person in the vehicle or not. When detecting a person in the vehicle, the gas temperature detecting module monitors the oxygen and carbon dioxide contents and temperature in the vehicle in real time if a vehicle owner does not come back within a preset time threshold. The signal processing module processes the information collected by the air temperature collecting module and judges whether the alarm module is activated to send an alarm message and the safety measure module opens a window or not. The system can effectively prevent the occurrence of asphyxia events.

A non-aqueous cell according to the present invention has an assembly element comprising a positive electrode, a negative electrode, and a separator in a sealed case with the features: an amount of electrolyte is greater than or equal to 30% and less than or equal to 100% of the total pore volume of said assembly element; and a carbon dioxide content is greater than or equal to 1 volume % of the total gas contained in said sealed case.

Methods for estimating the volume of the carbon dioxide stores of an individual's respiratory tract include determining a carbon dioxide store volume at which a correlation between corresponding signals of carbon dioxide elimination and an indicator of the content of carbon dioxide in blood of the individual is optimized. The estimate of the volume of carbon dioxide stores, which comprises a model of the respiratory tract, or lungs, of the individual, may be used as a transformation to improve the accuracy of one or both of the carbon dioxide elimination and carbon dioxide content signals. Transformation, or filtering, algorithms are also disclosed, as are systems in which the methods and algorithms may be used. The methods, algorithms, and systems may be used to accurately and noninvasively determine one or both of the pulmonary capillary blood flow and cardiac output of the individual.