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    METHODS AND SYSTEMS FOR BIOMASS-DERIVED CO2 SEQUESTRATION IN CONCRETES AND AGGREGATES
    2.
    发明公开
    METHODS AND SYSTEMS FOR BIOMASS-DERIVED CO2 SEQUESTRATION IN CONCRETES AND AGGREGATES 审中-公开

    公开(公告)号：US20230265019A1

    公开(公告)日：2023-08-24

    申请号：US18172087

    申请日：2023-02-21

    Applicant: CarbonBuilt

    Inventor： Iman Mehdipour

    IPC: C04B40/02 ,  C04B14/28 ,  F23K1/00

    CPC classification number: C04B40/0236 ,  C04B14/28 ,  F23K1/00 ,  C04B2111/00017

    Abstract: Provided herein are integrated biomass combustion-carbonation gas conditioning systems to directly sequester carbon dioxide from biomass-derived CO2-containing flue gas. The CO2 is sequestered by mineral carbonation in concrete materials within a carbonation reactor. The mineral carbonation processes sequester CO2 in concrete materials, aqueous slurries, or aggregates without any additional carbon enrichment process. Contacting a CO2-containing gas stream from a biomass combustion apparatus with concrete, aggregate, or alkaline solutions, causes a carbonation reaction in which carbonation products such as calcium carbonate (CaCO3) and alumina silica gel are formed. The carbonation reactions set forth herein are useful for strengthening concrete and concrete components. Certain processes herein condition the biomass-derived flue gas. The conditioning includes condensing the gas to remove acidic gas, and to remove particulates and water. The conditioning includes adjusting the temperature, relative humidity, and gas flow rate of the biomass-derived flue gas without any carbon capture step before entering the carbonation reactor. The permanent storage of CO2 in concrete materials reduces carbon emissions from biomass combustion systems. The process does so, in certain embodiments, at low temperatures, ambient pressure, and even under dilute CO2 concentrations in CO2-containing flue gas streams. For example, the CO2 concentration in a CO2-containing flue gas stream from a biomass combustion system may be lower than 20 volume percent (vol %) and be used to produce low-carbon concrete materials.

    REDUCING MERCURY EMISSIONS FROM THE BURNING OF COAL BY REMOTE SORBENT ADDITION
    7.
    发明申请
    REDUCING MERCURY EMISSIONS FROM THE BURNING OF COAL BY REMOTE SORBENT ADDITION 审中-公开

    公开(公告)号：US20200248902A1

    公开(公告)日：2020-08-06

    申请号：US16856158

    申请日：2020-04-23

    Applicant: NOx II, Ltd.

    Inventor： Douglas C. COMRIE

    IPC: F23J7/00 ,  F23J15/00 ,  C10L10/00 ,  F23K1/00 ,  C10L9/10 ,  C04B40/00 ,  C04B28/04 ,  C04B18/06 ,  B01D53/64 ,  B01D53/50 ,  C10L10/02

    Abstract: Sorbent components containing halogen, calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents such as calcium bromide are added to the coal ahead of combustion and other components are added into the flame or downstream of the flame, preferably at minimum temperatures to assure complete formation of the refractory structures that result in various advantages of the methods. When used together, the components reduce emissions of elemental and oxidized mercury; increase the level of Hg, As, Pb, and/or Cl in the coal ash; decrease the levels of leachable heavy metals (such as Hg) in the ash, preferably to levels below the detectable limits; and make a highly cementitious ash product.

    Reducing mercury emissions from the burning of coal
    8.
    发明授权
    Reducing mercury emissions from the burning of coal 有权

    公开(公告)号：US10359192B2

    公开(公告)日：2019-07-23

    申请号：US15792087

    申请日：2017-10-24

    Applicant: NOx II, Ltd.

    Inventor： Douglas C. Comrie

    IPC: F23J7/00 ,  B01D53/50 ,  B01D53/64 ,  C04B18/06 ,  C04B28/04 ,  F23J15/00 ,  C10L10/02 ,  C10L10/00 ,  C10L9/10 ,  F23K1/00 ,  C04B40/00

    Abstract: Sorbent components containing halogen, calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents such as calcium bromide are added to the coal ahead of combustion and other components are added into the flame or downstream of the flame, preferably at minimum temperatures to assure complete formation of the refractory structures that result in various advantages of the methods. When used together, the components reduce emissions of elemental and oxidized mercury; increase the level of Hg, As, Pb, and/or Cl in the coal ash; decrease the levels of leachable heavy metals (such as Hg) in the ash, preferably to levels below the detectable limits; and make a highly cementitious ash product.

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