441 results about "Low carbon dioxide" patented technology

Power plants and process for lowering CO₂ emissions generally includes extracting a portion of the recirculated CO₂-rich flue gas mid-way through the compression pathway of a gas turbine and removing the CO₂ in a separation unit. The remaining portion of the CO₂ rich flue gas (i.e., the portion of the recirculated flue gas that was not fed to the separation unit) is mixed with fresh air coming from an additional compressor-expander and then fed back to the compression pathway. As a result, flue gas recirculation increases the CO₂ concentration within the working fluid, leading to an additional increase in CO₂ partial pressure. As the concentration and partial pressure of CO₂ is increased, a lower energy penalty is observed to remove the CO₂. Moreover, a reduced volume is fed to the CO₂ separation unit during operation. Consequently, the size of the separation equipment can be reduced as well as the energy required for the separation process.

A process for removal of carbon dioxide from air using lithium-exchanged X-zeolites at low carbon dioxide partial pressures is provided. The process is particularly useful in applications where fresh air is not available and exhaled air needs to be recycled. An apparatus for carrying out the process is also provided.

The invention provides the disclosure of a novel plant/algae/cyanobacteria photosynthesis, biomass production, and productivity pathway involving low carbon dioxide inducible (LCI) proteins. According to the invention, the activity of one or more LCI proteins may be modulated to increase the same under conditions where such proteins are typically repressed. According to the invention, modulation of LCI protein activity was able to increase biomass production by as much as 80% under elevated CO₂ conditions. The invention includes methods, and genetically modified plants/algae/cyanobacteria, cells, plant parts and tissues.

The invention relates to a method for removing carbon dioxide from flue gas of power station by employing ammonia process and a system thereof. The method of the invention is that the spray of an ammonia empty tower circulation removes carbon dioxide; the ammonium hydrogen carbonate fell to tower bottom is divided into three paths: the first path is to circulate by means of a primary spray device at the upper part of a deposition pond; the second path is to circulate by means of a secondary spray device at the middle part of the deposition pond; the third path is that pumping the ammonium hydrogen carbonate out from the bottom of the deposition pond to process fertilizer ammonium bicarbonate after rotational flow, centrifugation and drying treatment; the flue gas after being removed carbon dioxide and defogged is emitted into atmosphere. The system comprises the primary spay device, the secondary spray device, a carbon dioxide absorbing tower of the defogging device from top to bottom, wherein, the primary spray device and the secondary spray device are respectively connected with the upper part and the middle of the deposition pond via a primary slurry circulation pump and a secondary circulation pump, and the water inlet of the primary spray device is provided with a ammonia supply device; the bottom of the deposition pond is serially connected with a cyclone separator, a centrifuge and a drier via a fluid thickening circulation pump; the invention is especially suitable for treating flue gas of power station with large flux and low carbon dioxide concentration, in addition, ammonium bicarbonate fertilizer can be obtained.

The invention discloses low-energy-consumption and low-emission cement and a preparation method and application thereof. Cement clinker mainly comprises the following minerals in parts by weight: 35-65 parts of C2S, 20-50 parts C4A3S and 5-15 parts of C4AF. A corresponding green stock consists of the following components in parts by weight: 30-60 parts of CaO, 25-35 parts of SiO, 5-35 parts of Al2O3, 1-6 parts of SO3 and 1-10 parts of Fe2O3. The cement clinker is a product which is prepared by calcining limestone, alumina and clay or sandstone and gypsum serving as raw materials at the temperature between 1,280 DEG C and 1,300 DEG C for 45-70 minutes by combining the advantages of low calcium content, low-temperature baking and high later strength of a belite mineral, low-temperature baking and high later strength of anhydrous calcium sulphoaluminate, and the like. The cement product has the advantages of excellent performance, low energy and resource consumption and low carbon dioxide emission, can play an important role in the field of construction, and has a wide application prospect.

The invention discloses a supercritical carbon dioxide microemulsion capable of reducing minimum miscible pressure of carbon dioxide and crude oil. The microemulsion consists of a CO2-philic surfactant, a cosolvent and supercritical carbon dioxide; and the microemulsion is prepared by the following steps: uniformly mixing the CO2-philic surfactant, the cosolvent and the supercritical carbon dioxide according to proportions under pressure of 8-20MPa and at temperature of 40-90 DEG C, and injecting an obtained mixture to an oil reservoir. The supercritical carbon dioxide microemulsion disclosed by the invention can be used for effectively reducing the minimum miscible pressure of carbon dioxide and crude oil by more than 20%, so that the miscible phase of the carbon dioxide and the crude oil can be achieved under relatively low pressure.

The invention discloses a system and method for preparing coal-based synthetic natural gas by using abandoned wind electricity or photo-electricity and industrial organic wastewater. The method comprises the following steps: by adopting large-scale abandoned wind electricity or abandoned photo-electricity as a working power supply of water electrolysis equipment, degrading or decomposing organic matters in industrial organic wastewater by virtue of an electrolysis mode, and respectively obtaining a large amount of by-products namely oxygen and hydrogen at two ends of an electrode, wherein oxygen is used as raw gas in a coal gasification process, hydrogen is directly used for reducing a large amount of carbon dioxide generated in coal gasification and adjusting the hydrogen-to-carbon ratio of refined gas in a mixer, and natural gas is prepared by virtue of methanation reaction. According to the system and method disclosed by the invention, a novel coal-based synthetic natural gas process is optimized and upgraded; and by virtue of combination and complementation of new and old energy industries, the yield of the coal chemical industry can be improved, the emission of carbon dioxide and energy consumption in a production process can be reduced, and the energy conservation, environmental protection and high benefits of a coal-based synthetic natural gas process can be achieved.

The invention provides a non-aqueous solvent carbon dioxide capture liquid, method and system and belongs to the field of carbon dioxide recovery. The non-aqueous solvent carbon dioxide capture liquid is prepared from, by weight, 60-80% of organic solvent and 20-40% of composite organic amine. The organic solvent comprises low alcohol and/or ethanediol. The composite organic amine comprises hindrance amine and active amine. The weight ratio of active amine to hindrance amine is (0.4-70):1. Hindrance amine contains primary amine or at least one piece of secondary amine, secondary amine is connected with secondary carbon atoms or tertiary carbon atoms, and primary amine is directly connected with the tertiary carbon atoms. Active amine comprises primary amine or secondary amine. The non-aqueous solvent carbon dioxide capture liquid has relatively low carbon dioxide desorption temperature and relatively low solvent specific heat capacity and latent heat of evaporation, therefore, energy consumption in the desorption process is effectively reduced, and the comprehensive capture cost of carbon dioxide is reduced.

The invention discloses a geological carbon dioxide sequestration structure and sequestration method and belongs to the technical field of carbon dioxide sequestration and environmental protection. The carbon dioxide produced in industrial production is recovered in a centralized mode and injected into abandoned oil fields and gas fields to make carbon dioxide and underground water generate a solid carbon dioxide hydrate, and the sequestration and emission reduction purposes are achieved. The carbon dioxide hydrate related in the invention has the characteristic of containing ultra-volume gas and can be safety saved under the stable geological conditions verified over thousands of years, and the leakage risk is greatly reduced. In addition, a well area device for oil and gas extraction injects carbon dioxide to the position 300-500 meters away from the ground, and the sequestration cost is greatly reduced. In consideration of policy making and implementation for carbon dioxide emission reduction in our country or even throughout the word, the geological carbon dioxide sequestration structure and sequestration method has a very wide market space.

A carbon dioxide capturing apparatus and process uses a self-generating power means that uses carbon dioxide in combustion exhaust gas through the convergence of a carbon dioxide absorption tower. The capturing apparatus and process also relies on ionic generator associated technology using a concentration difference between seawater and freshwater. The capturing apparatus and process result in increased production efficiency for electric energy and reduced costs for a carbon dioxide capturing process by increasing a concentration difference using an absorbent liquid for absorbing carbon dioxide and, at the same time, electricity is obtained through carbon dioxide which is a greenhouse gas.

The invention discloses a high biomass content epoxy resin composition. The high biomass content epoxy resin composition comprises, by mass, 100 parts of epoxidized plant oil, 1 to 100 parts of unsaturated bio-based dicarboxylic acid, 1 to 10 parts of a curing accelerator 1, and 1 to 10 parts of a radical initiator; wherein the curing accelerator 1 is tetrabutylammonium bromide, triphenylphosphine, 2-methylimidazole, 2,4,6-tris(dimethylaminomethyl)phenol, or boron trifluoride, and the radical initiator is a peroxy curing agent or an azo curing agent. The invention also discloses a curing method and applications of the high biomass content epoxy resin composition. The high biomass content epoxy resin composition is capable of improving material mechanical properties greatly; the main raw materials come from biomass renewable resources, are both green and nontoxic, and possesses certain positive functions in alleviating oil crisis and reducing carbon dioxide release; damage on human body is reduced, environmental pollution is reduced, and it is beneficial for industrialized application and especially application in the field of paint.

The invention relates to a method for increasing separation efficiency of oil field associated gas and recovering carbon dioxide, which belongs to the technical field of chemical industry. A double-membrane separator is used for increasing the processing efficiency of oil and gas field associated gas, and the invention provides a high efficiency oil-removal agent for displacing oil of the oil field. The double-membrane separator is used for respectively purifying light dydrocarbon and carbon dioxide in non-condensable gas, and three effects that light hydrocarbon recovery efficiency can be increased, apparatus operation load due to carbon dioxide is reduced and natural gas decarburization is reduced can be realized in same apparatus, a carbon dioxide separating membrane is used for purifying carbon dioxide and can be used for displacing oil injection. The method can effectively reduce the influence of carbon dioxide on a associated gas recovery device, apparatus operation cost is reduced, light hydrocarbon yield can reach more than 30%, concentration of natural gas carbon dioxide is reduced to less than 2%. The natural gas loss late is less than 0.5%, the apparatus is simple and compact, and is suitable for on-line production, and the economic benefit is high.

The invention relates to a method for producing low-temperature polyester fiber double-color strip fabric. By the method, the production process flow of the strip fabric is optimized, energy resources are saved to the greatest extent and the emission of carbon dioxide is reduced. The method comprises the following steps of: 1, performing a weaving process, namely weaving grey cloth on a double-sided circular knitting machine by selecting a low-temperature polyester fiber yarn and a positive ion yarn as upper face yarns and an ordinary polyester fiber yarn as a bottom face yarn according to double-sided acrylic cloth; and 2, performing dyeing and finishing processes, namely removing oil from the grey cloth, placing in a vat, throwing disperse dye stuff and positive dye stuff in a dye vat, dyeing in a bath, raising the temperature of dye liquid in the dye vat from room temperature to between 96 and 99 DEG C, preserving temperature for 40 to 60 minutes, reducing and washing for 20 to 30 minutes at the temperature of between 60 and 80 DEG C, taking the cloth out, dewatering, drying, forming and obtaining a finished product.

This invention concerns methods and apparatus for processing Fischer-Tropsch off-gas comprising the following steps: a) subjecting Fischer-Tropsch off-gas to at least a water gas shift reaction and partial CO₂ removal resulting in a Fischer-Tropsch off-gas with significantly reduced levels of carbon dioxide and a CO₂ rich stream; and optionally b) subjecting part of the carbon dioxide depleted Fischer-Tropsch off-gas to synthesis gas manufacturing; and c) using another part of the carbon dioxide depleted Fischer-Tropsch off-gas for generating energy.

An improved process for the production of lyophilized Piperacillin alone or in combination with Tazobactam with improved pH adjustment, by degassing the solution of products to a controlled low carbon dioxide content prior to lyophilization.

The invention discloses an air filtering device 3D printing method based on a human face, and the method comprises the steps: obtaining scanning data through various types of human face photographing and scanning technologies so as to obtain a digital model of the face of a user; importing the digital model into three-dimensional modeling software; generating a sealed part of a mask, a three-dimensional spatial structure of the mask and a cavity structure of the mask based on the human face digital model, carrying out the optimization and fine tuning of the sealed part and the structures, so as to guarantee the airtightness of the mask and the face and the optimal volume of a cavity; building a three-dimensional digital model of the mask through combining with the personalized design from a user and employing modeling software; determining a mask three-dimensional model, and transmitting the mask three-dimensional model to a 3D printer for printing; enabling an air filter to be embedded in the sealing part of the mask; and carrying out the binding of two side edges of a mask fixing part and the sealing part of the mask. The method can enable the mask to be matched with the facial profile of an individual, and reduces the leakage of air. The volume of the cavity in the mask is optimal, and the concentration of carbon dioxide is effectively reduced. The hardness of the sealing part can be adjusted to meet different demands of individuals.