330results about "Carbon capture" patented technology

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.

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.

Provided herein are methods and compositions for determining and reporting carbon dioxide sequestered and / or carbon dioxide avoided in operations involving concrete, including concrete raw material transport, concrete production, and concrete use.

Described is a method for extracting alkali from silicates under carbon neutral conditions. The method involves providing a reaction mixture containing an alkali-bearing aluminosilicate composition and an alkali base composition. The reaction mixture is treated with a combined activation and leaching process to form a concentrated alkali-silicate solution and an alkali aluminosilicate solid residue, where carbon dioxide is produced as a carbon dioxide reusable co-product from the activation. The alkali aluminosilicate solid residue is reacted with a first portion of the carbon dioxide reusable co-product to form an alkali leached aluminosilicate composition, thereby extracting alkali from the alkali-bearing aluminosilicate composition. Also described are methods of making inorganic polymer cement and concrete from the products and / or co-products produced by the method of extracting.

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.

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.

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.

The invention relates to a method for producing an aggregate comprising the steps of providing a starting product comprising at least 20% by mass magnesium silicate hydrate, crushing to a fineness corresponding to a BET surface area of 0.1 m2 / g or finer, homogenizing the starting product, and at least partially dewatering the starting product of bound water by means of thermal treatment in a thermal treatment unit, contacting the dewatered starting product with CO2, wherein CO2 reacts with the dewatered magnesium silicate hydrate and the CO2 is bound in the resulting magnesium carbonate hydrate and / or magnesium carbonate, and compressing and compacting the dewatered starting product before or after contacting with CO2 to solids for producing the aggregate. The invention also relates to an aggregate.

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.

A method / system for sequestering carbon dioxide from cement and lime production facilities wherein carbon dioxide from flue gases originating from cement or lime production facilities is recovered and transported to a building materials production facility where it is sequestered.

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.

A carbonation slurry production system is provided that can fix carbon dioxide in a slurry consisting of calcium-containing powder and water and can easily control the average residence time of the slurry. A carbonated slurry production system 1 including: a slurry tank 2 having first slurry storage portions 10a, 10b for contacting the slurry with a carbon dioxide-containing gas; a slurry supplying device 7 for supplying a slurry consisting of a calcium-containing powder and water; a carbon dioxide-containing gas supplying device 4 for supplying a carbon dioxide-containing gas at a pressure greater than atmospheric pressure to gas phases 9a, 9b consisting of the carbon dioxide-containing gas in the first slurry storage portion; a carbon dioxide-containing gas discharging device 5 for discharging the carbonated slurry; liquid level measuring means 6a, 6b, 6c for measuring the height of the liquid level consisting of the slurry; and a slurry control device 7 for controlling the average residence time of the slurry based on the heights of the first liquid levels 8a, 8b and the second liquid level 11.

High temperature furnaces, calcining, pyrolysis and other high temperature manufacturing processes, composition rearrangements, and equipment. Systems, equipment and processes using oxyfuel combustion using gaseous fuels for cement manufacture. Reactor furnaces using oxyfuel containing natural gas and gravity feed to process pellets forming a pellet bed into cement.

Described herein are processes for synthesizing hydraulic-carbonating binder systems through mechanochemical process, including providing a blend of material stream one of aluminosilicate or calcium aluminosilicate mineral material and material stream two of alkaline-rich mineral material; and simultaneously fractioning the blended minerals while contacting the blended minerals with a CO2-containing in the mechanochemical reactor. This binder system is useful for cementation functions in concrete. The precipitated carbonation products are mainly calcium carbonates (CaCO3), magnesium carbonates (MgCO3), and amorphous alumina-silica gel. The developed binder system is activated through hydration and / or concurrent hydration-carbonation reactions in concrete and it can be utilized in the form of slurry or dried powder for a wide range of precast and cast-in-place or ready-mix concrete applications. The binder system reacts with cement in concrete to form carbonate / calcium-silicate-hydrate (C-S-H) composite phases that result in enhanced mechanical properties.

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 disclosure herein sets forth processes and compositions for producing carbonated materials comprising calcium carbonates through a mechanochemical process. The present disclosure concerns the production of calcium carbonate by sequestrating CO2. Certain processes herein include providing alkaline-rich mineral materials that include carbonatable solid wastes such as lime kiln dust, cement kiln dust, and coal combustion residues, and simultaneously fractioning the alkaline-rich mineral materials, while contacting the alkaline-rich mineral materials with a CO2-containing gas in carbonation reactor at low temperature and ambient pressure. In some embodiments, the alkaline-rich mineral materials are partially carbonated before being used in the processes disclosed herein. After contacting the alkaline-rich mineral materials with a CO2-containing gas in carbonation reactor at low temperature and ambient pressure, solid calcium carbonate is produced. In aqueous reactors, the solid calcium carbonate is filtered from a solution in which it precipitated, and the remaining solution includes hydroxide as well as alkaline metal ions. The solution filtered from the solid calcium carbonate can be sequentially contacted with a CO2-containing gas stream to precipitate additional calcium carbonate. The carbonated materials formed from these processes can be used in the form of a slurry, as a moist powder, as a dried powder, as a reactive filler or as a supplementary cementitious material in a mixture that is used to make concrete.

Chemical reaction devices involving acid and / or base, and related systems and methods, are generally described.

Reaction schemes involving acids and bases; reactors comprising spatially varying chemical composition gradients (e.g., spatially varying pH gradients), and associated systems and methods, are generally described. For example, methods comprising producing an acid; dissolving a material comprising calcium in the acid to produce calcium ions; treating the calcium ions to produce solid calcium hydroxide and / or calcium oxide; and utilizing the solid calcium hydroxide and / or calcium oxide in a downstream process to produce a cement, wherein the downstream process comprises heating the solid calcium hydroxide and / or calcium oxide in a kiln are described.

Methods for carbon-capture within a biochar are provided. The method includes mixing a biochar with an alkaline solution to form an intermediate mixture and exposing the intermediate mixture to a CO2 source so as to precipitate calcium carbonate onto and into the biochar to form a CO2-weathered biochar. In some cases, the method also includes injecting CO2 into alkaline wastewater to sequester / store CO2 which can then serve as mixing water for producing cementitious composites. This method may be used to upcycle three waste streams, and treated CO2-weathered biochar preserves compressive strength of resultant concrete when substituted for a portion of the pre-cure cement and aggregate components. Further, treated CO2-weathered recycled aggregate preserves mechanical strength of resultant concrete when substituted for a portion of 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.

Reaction schemes involving acids and bases; reactors comprising spatially varying chemical composition gradients (e.g., spatially varying pH gradients), and associated systems and methods, are generally described.

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 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.

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.

Various embodiments include a system or platform that uses electrochemistry to upcycle waste products and low-value minerals into valuable, carbon dioxide (CO2)-neutral materials. Various embodiments may include systems and / or methods for processing material inputs using an electrochemical reactor. Various embodiments may include systems, methods, and / or devices for capturing and sequestering carbon dioxide (CO2) while producing valuable co-products.

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.