170results about "Carbon capture" patented technology

The invention provides compositions and methods directed to carbonation of a cement mix during mixing. The carbonation may be controlled by one or more feedback mechanisms to adjust carbon dioxide delivery based on one or more characteristics of the mix or other aspects of the mixing operation.

Provided herein are methods and compositions for carbonation of recycled concrete aggregates (RCA) to produce carbonated RCA. In addition, uses of the carbonated RCA, such as in building materials, and building materials containing RCA, are included. Carbonation of RCA may be used alone or may be used in combination with other carbonation processes associated with concrete manufacture, such as carbonation of wet concrete mixes and / or carbonation of concrete wash water.

Compositions and methods are provided for a system in which liquid carbon dioxide, or a mixture of liquid and gaseous carbon dioxide, is converted to solid carbon dioxide by exiting an orifice at a sufficient pressure drop, e.g., for delivery of carbon dioxide to a concrete mixture in a mixer.

The present invention discloses a high-concentration carbon dioxide capture system built on a cement kiln system and a low-carbon emission type cement clinker production line. Among them, the high-concentration carbon dioxide capture system includes a first decomposing furnace, a preheater assembly, a first gas-solid separator, a second decomposing furnace device, and a second gas-solid separator; the feed end of the first decomposing furnace is connected to the discharge end of the preheater assembly, and the intake end of the first decomposing furnace is connected to the cement kiln system; the inlet end of the first gas-solid separator is connected to the outlet end of the first decomposing furnace, the discharge end of the first gas-solid separator is connected to the second decomposing furnace device, and the outlet end of the first gas-solid separator is connected to the intake end of the preheater assembly; the inlet end of the second gas-solid separator is connected to the second decomposing furnace device. The low-carbon emission type cement clinker production line includes a cement kiln system, a high-concentration carbon dioxide capture system, and a carbon monoxide generation system that are connected to each other. The present invention effectively realizes the series connection and circulation of the production of cement clinker, carbon dioxide, and carbon monoxide.

Methods of capturing carbon in biochar are provided. The method includes mixing the biochar with an alkaline solution to form an intermediate mixture, and exposing the intermediate mixture to a CO2 source to precipitate calcium carbonate over and in the biochar to form a CO2 weathered biochar. In some cases, the method further includes injecting CO2 into the alkaline wastewater to sequestration / store CO2, which may then be used as mixed water for the production of cementitious composites. The method can be used for upgrading three waste streams, and the treated CO2 weathered biochar maintains the compressive strength of the obtained concrete when replacing part of the pre-cured cement and aggregate components. In addition, the treated CO2-weathered recycled aggregate maintains the mechanical strength of the obtained concrete when replacing part of the aggregate.

The invention provides methods and compositions for treating wash water from concrete production with carbon dioxide. The treated wash water can be reused as mix water in fresh batches of concrete.

To provide clinker powder that can absorb more carbon dioxide during a curing process, thereby reducing the total amount of carbon dioxide emitted, and that can produce a cement composition with excellent strength development, and a method for producing the clinker powder.SOLUTION: The clinker powder has a mineral composition having a hydraulic modulus (H.M.) of 1.1-2.0, a silica modulus (S.M.) of 1.5-3.5, an iron modulus (I.M.) of 1.7-3.5, and a total content of aluminum oxide (Al2O3) and iron oxide (Fe2O3) of 9.0-14.0 mass%.SELECTED DRAWING: None

The present invention relates to a construction material composition containing up to 55% by dry weight of Portland cement, which has high early and long-term compressive strength. Other major components in cement are SCM, limestone, a sulfate source, and an accelerator.

Provide is a carbonated cement slurry production system capable of efficiently fixing carbon dioxide in a cement slurry with a larger amount. A carbonated cement slurry production system 1 for producing a carbonated cement slurry formed by carbonation of a cement slurry containing cement and water by a carbon dioxide-containing gas, the carbonated cement slurry production system comprising: a carbonation apparatus 2 for bringing the cement slurry 15 into contact with the carbon dioxide-containing gas; and carbon dioxide-containing gas supply apparatus 3 for supplying the carbon dioxide-containing gas to the carbonation apparatus 2 at a pressure larger than an atmospheric pressure, wherein the carbonation apparatus 2 includes a carbonation tank 4 for storing the cement slurry 15 and the carbon dioxide-containing gas so that a gas phase formed of the carbon dioxide-containing gas is positioned above a liquid phase of the cement slurry.

A concrete mixing apparatus includes: a rotatable mixing drum; an internal combustion engine including an exhaust system for discharging exhaust gas containing carbon dioxide; a diverter pipe connected in fluid communication with the exhaust system and the mixing drum; and means for cooling the exhaust gas upstream of the mixing drum.

Embodiments of the present invention disclose a cement production system, a preheating assembly of the system has a first inlet for receiving cement raw materials and a first outlet for discharging the cement raw materials preheated by the preheating assembly; a first cylinder is in communication with the first outlet to receive the preheated cement raw materials discharged from the preheating assembly, a combustion assembly is arranged on the outer wall of the first cylinder, the combustion assembly is used for heating and decomposing calcium carbonate in the cement raw materials into semi-clinker and carbon dioxide gas, the first cylinder has a second outlet for discharging the semi-clinker and a third outlet for discharging the carbon dioxide gas; a part of a sintering assembly is in communication with the second outlet to receive the semi-clinker discharged from the first cylinder and sinter the semi-clinker into clinker; a carbon capture assembly is in communication with the third outlet to receive the carbon dioxide gas discharged from the first cylinder and capture and recycle the carbon dioxide gas. The cement production system of the embodiments of the present invention significantly reduces the energy consumption of carbon capture.

The disclosure relates to a method for controlling carbonation synthesis of silicon and / or aluminium carbonate minerals, wherein the concentration of dissolved silicon and / or aluminium in a mix to be cured is adjusted to at least 1 mmol / 1 before curing the mix with gas comprising carbon dioxide (CO2) having a partial pressure of CO2 of at least 0.15 bar. In some embodiments of the disclosure an alkaline substance is added to the raw material to provide the mix where the total concentration of dissolved silicon and / or aluminium of at least 1 mmol / 1. The disclosure also relates to a product obtainable by the methods of the disclosure as well as to the use of the product as building material, preferably for producing concrete-like products, more preferably for elements, most preferably for pre-casted elements and to the use of the method in construction industry or for production of elements and / or pre-casted elements.

The invention relates to a method for producing material containing hydrated cement, wherein the material is crushed in a first crushing device (2) and then supplied to a reactor (3) in which the material is mixed with an aqueous liquid and CO2 and in which a mixing movement of the material is generated, wherein the material removed from the reactor (3) is split into at least two fractions by means of a grading device (20). Furthermore, the temperature and the pressure in the reactor (3) are influenced such that an overpresssure in comparison with the atmospheric pressure and a temperature higher than 100°C are adjusted.

Method and equipment for conditioning wet concrete (703), the wet concrete (703) being agitated in a revolving-drum concrete mixer (702), thereby bringing changing portions of the wet concrete (703) to a free surface (706) of the wet concrete (703) inside the mixer (702), the agitated wet concrete (703) being cooled and partially carbonated in that liquid and / or solid carbon dioxide is supplied to the concrete mixer (702) simultaneously with liquid nitrogen so that both the supplied nitrogen and the supplied carbon dioxide contact the free surface (706) of the wet concrete (703).

The present invention relates to methods for integrating CO2-mediated mineral carbonation and / or activation in a cement production facility and methods for producing low-carbon-footprint cement, comprising withdrawing at least part of the exhaust gas generated cement production, conditioning it by modifying one or more of temperature, pressure, CO2 concentration and humidity, subjecting an activatable solid feedstock to a size-reduction operation in a size-reduction apparatus distinct from the raw mill and cement mill, and producing low-carbon-footprint cement by mixing the CO2-activated material with the cement wherein mixing is performed feeding the CO2-activated material to the cement mill or a distinct mixing apparatus.

A carbonated slurry production system that can continuously and efficiently fix carbon dioxide in a slurry formed of calcium-containing powder and water, and that can easily and stably control an average retention time of the slurry,including: a slurry tank having a first slurry storage portion for contacting the slurry with a carbon dioxide-containing gas, a slurry supply device for supplying a slurry containing a calcium-containing powder and water; a carbon dioxide-containing gas supply device for supplying a carbon dioxide-containing gas at a pressure greater than atmospheric pressure to a gas phase formed of the carbon dioxide-containing gas in the first slurry storage portion; carbonated slurry discharge device for discharging the carbonated slurry; liquid surface measurement unit for measuring the height of a liquid surface; and a slurry control device for controlling the average retention time of the slurry based on the heights of the first and second liquid surfaces.

Provided herein are compositions and methods for carbonating wash water (reclaimed water) produced during the production and use of concrete, and subsequent uses of the carbonated reclaimed water, including its use in the manufacture and use of additional batches of concrete.

To provide a carbonation hardening body capable of largely reducing a total amount of carbon dioxide exhausted and having large strength, by absorbing a large amount of carbon dioxide in an aging process.SOLUTION: A carbonation hardening body obtained by carbonating a hardening body of a hydraulic composition containing (A) a powdery hydraulic material containing C2S and C2AS and containing pulverized calcined material that satisfies the following conditions (1) and (2), (B) water, and (C) an aggregate containing cement hydrate-containing aggregate. (1) When the fired product does not contain C4AF, an amount of C2AS is 10 to 2,000 pts.mass with respect to 100 pts. mass of C2S, and when the fired product contains C4AF, a total amount of C2AS and C4AF with respect to 100 pts.mass of C2S is 10 to 2,000 pts.mass, and a ratio of C4AF in the total 100 mass% of C2AS and C4AF is 70% by mass or less, and (2) the fired product does not contain C3A or contains C3A in an amount of 20 pts.mass or less relative to 100 pts.mass of C2S.SELECTED DRAWING: None

The present invention relates to compositions comprising a mechanochemically carboxylated inorganic filler and a binder, wherein the binder is cement and / or asphalt, and the filler is obtained from a mechanochemically carboxylated silicate mineral. The present invention also relates to methods for making such compositions. The present invention further relates to methods for making concrete from these compositions, and to the concrete obtained from such methods. The present invention also relates to methods for using the mechanochemically carboxylated inorganic filler, for example, as a filler in asphalt or cement.

Methods of making settable compositions that include uncured carbonate aggregates are provided. Aspects of the methods include: preparing a carbonate slurry, subjecting the carbonate slurry to rotational action (optionally with an aggregate substrate), to produce an uncured carbonate aggregate, and then combining the uncured carbonate aggregate with a cement component and a liquid to produce the settable composition. Also provided are settable compositions produced by the methods and uses thereof.

The present invention relates to a method for manufacturing a carbonated binder using carbon dioxide for treating captured carbon dioxide, a deep cement mixing method for improving soft ground using same, a carbonation reaction apparatus used in the method for manufacturing a carbonated binder, and a carbon dioxide capture device using the carbonation reaction apparatus. The method for manufacturing the carbonated binder comprises: (a) mixing a powdered binder with mixing water to generate a liquid mixed binder; and (b) reacting the generated liquid mixed binder with carbon dioxide by means of a carbonation reaction apparatus to produce a carbonated binder, wherein the carbonation reaction apparatus may be configured to operate in a continuous flow manner in which the liquid mixed binder is sequentially introduced, reacted with carbon dioxide, and discharged.

The present invention provides a cementitious reagent material produced from globally abundant inorganic feedstocks, methods for the manufacture of such cementitious reagent material and for forming the reagent material as microspherical glassy particles, and also provides an apparatus, system, and method for the thermochemical production of glassy cementitious reagent having a spherical morphology. [Solution] A cementitious reagent is provided, which includes particles containing atoms of Si, Al, Fe, Ca, Mg, Na, and K, said particles having a spherical morphology with an average circularity (R) of >0.8, and said particles being at least 80% X-ray amorphous.

Methods of making a hydraulic cement are provided. Aspects of the methods include employing precipitated calcium carbonate (PCC), such as a CO2 sequestering PCC, as a feedstock for lime (CaO) production. Also provided are hydraulic cements and concretes produced by methods of embodiments of the invention, as well as products produced therefrom. In addition, systems for practicing methods of embodiments of the invention are provided.

The sand aggregate (180) includes a plurality of aggregate grains (182), at least one of which includes desert sand grains (120) that are too small for use in concrete applications, carbonate particles (150) distributed on the outer surfaces (122) of the desert sand grains (120), and a sand-based adhesive (170) that clumps the desert sand grains (120) together. The at least one aggregate grain (182) has a size comparable to that of river sand grains, while the desert sand grains (120) have a smaller size than the river sand grains, making the at least one aggregate grain (182) suitable for concrete applications.

Divalent ions are extracted from solids by leaching to form a divalent ion-containing solution. The divalent ion-containing solution is subjected to concentration to form a concentrated divalent ion-containing solution. Precipitation of a divalent ion hydroxide salt is induced from the concentrated divalent ion-containing solution. In other cases, the concentrated divalent ion-containing solution is exposed to carbon dioxide to induce precipitation of a divalent ion carbonate salt.

The invention relates to a method for recycling concrete (6) or concrete-building material mixtures and to a mixture for coating paper and / or for producing cement and / or toothpaste, and / or formulations, coatings and / or dispersions made of polymers, paints, sealants and / or silicones. The method has the steps of mixing (5) a second fluid (3) with the concrete (6) or the concrete-building material mixture; dissolving Ca out of the concrete (6) or the concrete-building material mixture in the second fluid (3) in order to obtain a Ca-enriched second fluid (3a); isolating (7) the Ca-enriched second fluid (3a); precipitating (8) CaCO3 (9) from the Ca-enriched second fluid (3a) by mixing with a first fluid (2) at a pressure ranging from 1.1 bar to 500 bar; isolating the CaCO3 (9), in particular by means of a solid-liquid separation (10) of the CaCO3 (9) precipitated from the second fluid (3), and drying (11) the isolated CaCO3 (9).

A cement clinker producing system, capable of providing a gas containing a carbon dioxide gas at a high concentration by increasing a carbon dioxide gas concentration for a part of an exhaust gas, includes a cyclone preheater to preheat a cement clinker raw material, a rotary kiln to burn the preheated cement clinker raw material so as to provide cement clinker, a calcination furnace to promote decarbonation of the cement clinker raw material, a clinker cooler to cool the cement clinker, a kiln exhaust-gas discharge passages to discharge an exhaust gas generated in the rotary kiln, a combustion-supporting gas supply device to supply a combustion-supporting gas having a higher oxygen concentration than air, a combustion-supporting gas supply passage to guide the combustion-supporting gas to the calcination furnace, and a calcination furnace exhaust-gas discharge passage to discharge a carbon dioxide gas-containing exhaust gas generated in the calcination furnace.

The invention comprises a method and a system (1) for treating concrete particles (2) for subsequent recycling of said concrete particles. In the method, a container (4) of the system (1) is filled with concrete particles (2), the container being airtight at least in certain areas. Subsequently, a gas containing CO2 is input continuously or discontinuously depending on the degree of absorption of CO2 by the concrete particles (2) in the container (4), said degree being determined by at least one sensor (8, 9, 10). After a predetermined CO2 saturation of the concrete particles (2) has been detected, the concrete particles (2) that have become rich in CO2 are removed.