241 results about "Carbon dioxide absorber" patented technology

Disclosed are apparatus and method to treat large amounts of flue gas from a pulverized coal combustion power plant. The flue gas is contacted with solid sorbents to selectively absorb CO₂, which is then released as a nearly pure CO₂ gas stream upon regeneration at higher temperature. The method is capable of handling the necessary sorbent circulation rates of tens of millions of lbs/hr to separate CO₂ from a power plant's flue gas stream. Because pressurizing large amounts of flue gas is cost prohibitive, the method of this invention minimizes the overall pressure drop in the absorption section to less than 25 inches of water column. The internal circulation of sorbent within the absorber assembly in the proposed method not only minimizes temperature increases in the absorber to less than 25° F., but also increases the CO₂ concentration in the sorbent to near saturation levels. Saturating the sorbent with CO₂ in the absorber section minimizes the heat energy needed for sorbent regeneration. The commercial embodiments of the proposed method can be optimized for sorbents with slower or faster absorption kinetics, low or high heat release rates, low or high saturation capacities and slower or faster regeneration kinetics.

A method for reclaiming CO2 absorbing chemical(s) from a lean aqueous CO2 absorbent leaving a regeneration column (8), where lean absorbent (30) is withdrawn and flashed (31) to generate a vapor that is compressed (34) and returned into the regeneration column as stripper gas (37), where a part of the lean absorbent (20) is withdrawn and introduced into a reclaimer (21) in which the lean absorbent is boiled to generate a gas phase (23) that is withdrawn and returned into the regeneration column as reclaimed absorbent, and a liquid phase containing impurities (24), wherein the gaseous phase that is withdrawn from the reclaimer is compressed (34) together with the vapor part (33) from the flashing of the lean absorbent, to generate a pressure in the reclaimer that is lower than the pressure in the regeneration column, and a reboiler (11) for carrying out the method, are described.

The fruit and vegetable fresh-keeping agent is placed in the paper bag or cloth bag. Its composition includes (1) active adsorbent, 0.5-5 portions, it is active carbon in which the potassium permanganate is adsorbed, active clay, attapulgite or diatoms; (2) oxygen absorbent, 0.5-5 portions, it is iron powder, (3) ethylene absorbent, 0.5-5 portions, it is zeolite or bentonite; (4). CO2 adsorbent, 0.5-5 portions, it is lime hydrate or coke molecular sieve; (5) antimicrobial agent, 1 portion, it is sodium benzoate; and (6) auxiliary agent, 1-10 portions, it is mixture formed from equi-mass sodium chloride and crystal sodium carbonate or mixture formed from equi-mass calcium chloride and crystal sodium carbonate. The adoption of said fresh-keeping agent can obtain obvious fresh-keeping effect.

The invention relates to a multifunctional indoor air purification and detection system. The multifunctional indoor air purification and detection system comprises an air detection module, a detection processor, an air purification processor, a Bluetooth communication module, a logic control module and a display operating system. Three systems are adopted by the air detection system for detecting a first PM 2.5 content value outdoors, a second PM 2.5 content value at an indoor air inlet and a third PM 2.5 content value at an indoor air outlet respectively. The air purification processor is connected with an indoor airflow field conditioning module, a dust filtering module, a hazardous gas absorber, a carbon dioxide absorber and a purification controller. According to the multifunctional indoor air purification and detection system, the categories of pollutants can be detected, and if the concentration of various pollutants exceeds the national standard, different draught fans are hierarchically driven to achieve segmental purification; multiple types of air detection modules are integrated, so that the system size is reduced, indoor air can be detected accurately and indoor detection cost is reduced.

A carbon dioxide storage means stores the carbon dioxide released in a heat exchanger. The heat exchanger cools the exhaust gas emitted by the internal combustion engine, and includes a thermal electric generator (TEG) configured to couple thermally the exhaust gas chamber to the absorber fluid chamber in a manner effective to heat the CO2 absorbent fluid by heat from the engine exhaust to release CO2 gas from the CO2 absorbent fluid and generate electricity in response to a temperature difference therebetween. The CO2 absorbent fluid is one of: a) an aliphatic di-functional nitrile (e.g. pimelonitrile); and b) an oligomeric poly-acrylonitrile (PAN).

The invention provides an embedded double-line central oxygen supply lifesaving system for a mine refuge chamber. An embedded mine refuge chamber lifesaving cabin body is arranged inside a mine chamber; the cabin body is a sealed inflated flame-retarding double-layer lifesaving cabin body; a compressed air pipeline port running through the cabin body and a communication data line interface are arranged on the cabin body; and a double-line central oxygen supply lifesaving system, a carbon dioxide absorber, a power carrier communication device, a UPS power source, an RFID personnel identification system, a video safety monitoring system, an automatic toxic and harmful gas detector, a sealed physiological excretion discharger and a survival food storage cabinet are arranged inside the cabin body. The double-line central oxygen supply lifesaving system is connected with central air and oxygen supplying masks and is connected with the compressed air pipeline port. The power carrier communication device is connected with the communication data line interface. The embedded double-line central oxygen supply lifesaving system can provide a shelter, oxygen and living spaces for the mineworkers in the case of mine disasters and can have the functions of saving life and providing refuge; meanwhile, the embedded double-line central oxygen supply lifesaving system is provided with a double-line oxygen supply system.

The present invention relates to a high-activity calcium base CO2 obsorbent and its preparation method. The described method uses alcohols, distilled water, aluminium salt and calcium oxide as raw material, and includes the following steps: calcining for 1-4 hr. at 800-1000 deg.C, adding alcohols and distilled water, calcining dried sample for 3 hr, at 500-700 deg.C, grinding, more adding distilled water, drying, calcining dried sample for 1-3 hr, at 700-1000 deg.C, fine grinding so as to obtain the invented high-activity calcium base CO2 absorbent.

The invention discloses a greenhouse intelligent adjusting and controlling device and method. A special device and a unit control system are included. The special device comprises an upper channel and a lower channel which are arranged at the top in a greenhouse and are arranged horizontally. A fan is arranged in the upper channel. A carbon dioxide absorber and a carbon dioxide back flow device are arranged in the lower channel. The greenhouse is provided with a special air conditioner unit. The unit control system is connected with a carbon dioxide concentration tester and a humidity sensor and a temperature sensor arranged in the greenhouse. Reliability control over three environment factors of temperature, humidity and carbon dioxide is achieved, and cost is low.

The present invention relates to a carbon dioxide absorbent. In particular, the present invention relates to a carbon dioxide absorbent comprising an ionic liquid, amine and glycol. Since the carbon dioxide absorbent of the present invention can retain excellent CO₂ absorption capacity despite repetitive regenerations at low temperature, it can reduce energy consumption and a loss of absorbents used, and therefore, can be effectively used for a process of collecting carbon dioxide from exhaust gas and natural gas and separating the same.

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.

A respirator shall be improved concerning better utilization of the carbon dioxide absorber (3). To accomplish the object, a transponder (5), which contains data on the type of absorber, the period of use and the current state of consumption, is arranged at the carbon dioxide absorber (3). A transponder polling device (8) at the respirator (1) reads the data from the memory chip (6) and an updated state of consumption is calculated from data on the operation of the respirator and stored again in the memory chip (6).

A carbon dioxide absorbent is disclosed. The absorbent compostion contains a liquid, non-aqueous, silicon-based material, functionalized with one or more groups that reversibly react with CO₂ and/or have a high-affinity for CO₂; and at least one amino alcohol compound. A method for reducing the amount of carbon dioxide in a process stream is also described. The method includes the step of contacting the stream with the carbon dioxide absorbent composition. A power plant that includes a carbon dioxide removal unit based on the carbon dioxide absorbent is also described.

The invention relates to a two-phase wet-type anaerobic digestion treatment method of food waste, which adopts an intermittent two-stage wet-type anaerobic digestion process aiming at food waste treatment characteristics: the solid-liquid separation is simultaneously achieved when crushed food waste is put in a hydrolysis acidification reactor to carry out acidification, acidified liquid enters into a methane-phase reactor to carry out continuous digestion, digested gas passes through a methane and carbon dioxide detector and a carbon dioxide absorber in sequence and finally enters into a gas collection device, and effluent water digestion liquid of a methane phase is recycled to an acidification phase. In the invention, the solid-liquid separation is simultaneously realized in the hydrolysis acidification process, therefore, the production ratio of volatile fatty acid is increased, and the hydraulic retention time of the acidification phase is reduced; effluent water of the methane phase is recycled to the acidification phase so as to dilute the input concentration and be capable of adjusting the pH value of the acidification reaction, therefore, the operation cost is saved, the pH value is easy to control, and the acidification effect is remarkably enhanced.

A system for separating carbon dioxide gas from internal combustion engine exhaust and an electricity generating heat exchanger for the system. The system includes a scrubber tank containing a carbon dioxide absorbent fluid and configured to bubble exhaust gas from the heat exchanger through the carbon dioxide absorbent fluid, whereby carbon dioxide gas is absorbed by the carbon dioxide absorbent fluid. A carbon dioxide storage means stores the carbon dioxide released in a heat exchanger. The heat exchanger cools the exhaust gas emitted by the internal combustion engine, and includes a thermal electric generator (TEG) configured to couple thermally the exhaust gas chamber to the absorber fluid chamber in a manner effective to heat the CO2 absorbent fluid by heat from the engine exhaust to release CO2 gas from the CO2 absorbent fluid and generate electricity in response to a temperature difference therebetween.

In accordance with one aspect, the present invention provides an amino-siloxane composition comprising at least one of structures I, II, III, IV or V said compositions being useful for the capture of carbon dioxide from gas streams such as power plant flue gases. In addition, the present invention provides methods of preparing the amino-siloxane compositions are provided. Also provided are methods for reducing the amount of carbon dioxide in a process stream employing the amino-siloxane compositions of the invention as species which react with carbon dioxide to form an adduct with carbon dioxide. The reaction of the amino-siloxane compositions provided by the present invention with carbon dioxide is reversible and thus, the method provides for multicycle use of said compositions.

A carbon dioxide absorbent comprising (i) a liquid, nonaqueous silicon-based material, functionalized with one or more groups that either reversibly react with CO₂ or have a high-affinity for CO₂ is provided and (ii) a hydroxy-containing solvent. The absorbent may be utilized in methods to reduce carbon dioxide in an exhaust gas, and finds particular utility in power plants.

The invention discloses a preparation method of a heavy metal polluted soil stabilizer, belonging to the technical field of soil remediation and treatment. The preparation method is characterized by comprising the following steps: blasting air or carbon dioxide gas under the conditions that polymine is used as a skeleton and a magnesium compound is used as an alkaline modifier and tetramethylammonium hydroxide is used as a carbon dioxide absorbent, and adding carbon disulfide to synthesize a mixture of a polymer chelating agent and a magnesium carbonate microcrystal; and adding ferric salt and carrying out chelating, oxidization/reduction, precipitation and adsorption to realize the efficiently stabilization of heavy metals in the polluted soil. In the stabilizer, the mass ratio of polymine to magnesium compound to tetramethylammonium hydroxide to ferric salt is 1:(0.2-0.6):(0.05-0.1):(0.1-0.5), wherein the molar weight of introduced carbon dioxide is at least 20% of that of magnesium ions and any amount of water is added. The stabilizer can be a solution or a crystal substance. The stabilizer is simple in synthetic technology and can realize efficient and fast stabilization of various heavy metals while carbon sequestration.

A protective fabric or material includes a base material and at least one inorganic filler selected from the group consisting of a chemical decontamination agent, a biological decontamination agent, an electromagnetic radiation shielding agent, an antimicrobial agent, a self-decontaminating agent, a decontamination catalyst, a carbon dioxide absorbing agent, and a combination thereof.

In an isotopic gas analyzer, a gas injector (21) is provided for pressurizing a gas specimen in cells (11a,11b). The pressurization of the gas specimen virtually produces the same effect as increasing the concentration of carbon dioxide in the gas specimen, thereby improving an S/N ratio for the analysis and hence data reproducibility.

The invention is applicable to the technical field of medical equipment, discloses an anesthesia machine respiratory system and an anesthesia machine. The anesthesia machine respiratory system comprises a drive branch and a gas exhaust pipeline. The anesthesia machine respiratory system also comprises a switching device used for selectively guiding gases breathed out by a patient into the drive branch and or the gas exhaust pipeline to realize switching between re-inhaling or non-re-haling. The switching device is connected to the drive branch and the gas exhaust pipeline. The drive branch is connected to an absorption device. The anesthesia machine comprises the above the anesthesia machine respiratory system. According to the anesthesia machine respiratory system and the anesthesia machine provided by the invention, rapid switching between a non-re-haling system and a re-inhaling system can be realized. In the mode of the non-re-haling system, medical workers do not need to pay attention to whether a carbon dioxide absorbent in the absorption device needs to be replaced, so that burdens for the medical workers are reduced, and the usage is convenient.

The invention provides recyclable ionic liquid type carbon dioxide absorbent and a preparation method thereof. The cation of the absorbent in the invention is a poly-nitrogen straight chain amine substance; and the anion of the absorbent is organic acid radical or inorganic acid radical, wherein the organic acid is a carboxylic acid derivative, a sulphuric acid derivative, a phosphoric acid derivative and carboxylic acid above C3. The preparation method of the absorbent comprises the steps of taking the poly-nitrogen straight chain amine substance and the organic acid or the inorganic acid as raw materials and synthesizing through an acid-base neutralization method. The absorbent disclosed by the invention can absorb CO2 at room temperature or under a high-temperature condition; the absorption effect above 15% on CO2 in mixed gas can be achieved; furthermore, the absorbed ionic liquid can be desorbed; the desorbing rate is more than 99%; the absorbent is recyclable; and, after the absorbent is utilized repetitively for many times, the original absorption amount still can be kept.

Provided is one of labels 101, 120, 130 and 140, top layer materials formed on a printing medium 201, 246 and 266, information-bearing media 301, 330, 350 and 360, a solid fuel 401, and a wristband clip 510, having the function of absorbing carbon dioxide to which a new carbon dioxide absorbent is added. Provided are also carbon dioxide reduction methods of absorbing carbon dioxide by burning the same.

Provided is a glove type operation box which can reduce the concentration of carbon dioxide. A dehumidification rotary device is divided into an absorption area (2), a purification area (3), and a regeneration area (4) relative to the rotation direction of the dehumidification rotary device, a regeneration circulating path allowing air to circulate by passing through the regeneration area (4) is arranged to enable outside air to mix with a part of the regeneration circulating air for cooling. On this basis, the air passes through a carbon dioxide absorption tank (10) filled with a carbon dioxide absorbent composed of alkali metal hydroxide or alkali earth metal hydroxide, and then passes through the absorption area (2), and the air in the absorption area (2) is supplied to a drying chamber (16); moreover, the air enters into a cooling device (22) via the backflow air valve (18), so that the cooled and dried air can be returned back to the absorption area (2).