12results about "Carbon capture" patented technology

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 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.

A carbon-neutral, or even carbon-negative, cement is provided. The hardening of these novel cements is based on acid-base reactions, and the cements are formulated with CO2- or biomass-derived organic acids, organic acid salts (e.g., NaHC2O4), or mixtufres thereof, and geographically abundant mineral bases, with or without small-dose functional admixtures or additives.

This invention relates to a method for simultaneously cleaning exhaust gases and manufacturing supplementary cementitious materials. It involves simultaneously cleaning CO2 and / or SO2 from exhaust gases using recycled concrete fine powder. x Methods for manufacturing supplemental binder materials, including: providing d in stockpiles or silos 90 ≤ 1000µm recycled concrete fine powder is used as starting material. The starting material is purged to provide carbonation material. The carbonation material and cleaned exhaust gas are removed, and the carbonation material is depolymerized to form supplementary binder material; and d-containing 90 Stockpiles or silos of recycled concrete fine powder ≤ 1000µm are used as starting materials for cleaning CO2 and / or SO2 in exhaust gases. x It is also used to manufacture supplementary adhesive materials.

A method including entraining carbon dioxide (CO2) in a cement slurry composition and subjecting the cement slurry composition to conditions under which the CO2 achieves and maintains a supercritical state; and allowing the cement slurry composition to harden to form a hardened cement having CO2 sequestered therein.

A method of making a cement composite can include contacting an aqueous solution comprising calcium ions with a carbon dioxide source producing a carbonated aqueous solution. Fine particles can be submerged in the carbonated aqueous solution to produce microaggregate particles comprising the fine particles coated with calcium carbonate. The microaggregate particles can be combined with cement particles to produce the cement composite. The cement composite can be used in cementing applications for hydrocarbon wells including for casing liners and well plugs.

HZ 8301 EP Abstract Method for manufacturing concrete parts comprising the steps: - providing a hydraulic cement and aggregate - mixing the cement and aggregate with water to provide a fresh concrete - introducing CO2 into the fresh concrete in an amount resulting in a carbonation degree of more than 0.5 wt.-% and less than 5 wt.-% of the total carbonatable Ca and Mg phases which are calculated as 0.785 × (CaO - 0.56 CaCO3 - 0.7 SO3 ) + 1.091 × (MgO - 0.479 MgCO3) for a first carbonation step - curing the fresh concrete until at least 15 wt.-% of the calcium aluminates are hydrated to provide a green concrete part - subjecting the green concrete part to CO2 in an amount resulting in a carbonation degree of more than 10 wt.-% of the total carbonatable Ca and Mg phases which are calculated as 0.785 × (CaO - 0.56 CaCO3 - 0.7 SO3 ) + 1.091 × (MgO - 0.479 MgCO3) for a final carbonation step, and - storing the part for 0.5 hours to 28 days for further hydration of not-yet carbonated, not-yet hydrated cement to provide the concrete part. and concrete parts obtainable with the method.

The invention relates to an installation (14) for the thermal treatment of dispersible raw material, in particular cement raw meal and / or mineral products, comprising an ascending line (62) through which hot gases can flow, wherein the ascending line has at least one fuel inlet (48, 50) for the admission of fuel into the ascending line (62), wherein the ascending line (62) has at least one raw meal inlet (44, 46) for the admission of raw meal into the ascending line (62), which at least one raw meal inlet (44, 46) is arranged upstream of the fuel inlet (24) in a flow direction of the gas within the ascending line (62). The invention also relates to a method for the thermal treatment of dispersible raw material, in particular cement raw meal and / or mineral products, having the steps: - admitting fuel via a fuel inlet (48, 50) into an ascending line (62) for conducting hot gases, and - admitting raw meal into the ascending line (62), wherein the raw meal is introduced into the ascending line (62) upstream of the fuel inlet (48, 50) in the flow direction of the gas.

The invention relates to a carbonation system comprising a carbonation cell made of monolithic, cylindrically shaped metallic material (preferably stainless-steel), capable of withstanding pressures up to 100 bar, for binding carbon dioxide to mineral-based materials in powder or sand form. The carbonation cell includes a cell lid (2) and a gas valve (3) that allows both gas inlet and outlet through a single fluid line, a pneumatic hose (4) for gas transfer between the carbonation cell and a CO2 source (6), and a manometer (5) for measuring gas pressure. The CO2 source (6) stores the CO2 gas to be delivered into the carbonation cell body (1). In the carbonation process, to remove air from inside the cell, CO2 gas is introduced and released through the same single line in preferably three successive purging cycles. Afterward, the system pressure is brought to the target pressure, and carbonation of the mineral material is achieved. The system is designed for carrying out accelerated carbonation reactions in mineral-based materials independently of applications performed with fresh cement or concrete mortar.

The embodiment of the present application discloses a low-carbon cement production method, which comprises the following steps: preheating cement raw materials; heating and decomposing the preheated raw materials to decompose calcium carbonate in the cement raw materials into semi-clinker and carbon dioxide gas; sintering the semi-clinker into clinker and cooling the clinker; capturing the carbon dioxide gas; recycling part of the carbon dioxide gas into a decomposition furnace to form a carbon dioxide circulation loop; and supplementing external carbon dioxide into the carbon dioxide circulation loop when the circulation gas amount in the carbon dioxide circulation loop is insufficient. The low-carbon cement production method of the embodiment of the present application avoids the dilution of nitrogen to process emission CO2 in the traditional process by introducing controllable pure CO2 protective gas into the decomposition furnace and maintaining micro-negative pressure.