{
    "title": "Carbon Dioxide Sequestration Patents",
    "inventor_name": null,
    "publication_year": null,
    "device_name": "Carbon Dioxide Sequestration System",
    "goal": "Capture and permanently store carbon dioxide emissions from fossil-fuel combustion.",
    "problem_addressed": "Atmospheric CO_2 buildup and greenhouse-gas emissions from power plants and industrial processes.",
    "concept_summary": "A family of processes and apparatuses that capture CO_2 (and other gases) from flue streams, convert it into solid carbonates via mineral carbonation, plasma ionization, or chemical absorption, and store the solid product or compressed CO_2 underground. The technologies employ acid-base reactions, ionized water scrubbing, plasma arcs, and gas-separation membranes to achieve high-purity CO_2 capture and sequestration.",
    "detailed_description": null,
    "category": "Chemistry & Chemical Processes",
    "principles": [
        "Acid-base neutralization",
        "Mineral carbonation",
        "Plasma ionization",
        "Gas absorption and scrubbing",
        "Membrane gas separation",
        "Compression and condensation"
    ],
    "scientific_domains": [
        "Chemistry",
        "Environmental Engineering",
        "Chemical Engineering",
        "Materials Science",
        "Energy Systems"
    ],
    "mechanisms_of_action": [
        "Dissolution of magnesium or calcium minerals in weak acid to form metal-rich solutions",
        "Addition of CO_2 and base to precipitate metal carbonates",
        "Ionization of flue gases in a plasma arc to produce elemental fragments",
        "Spray of ionized water in a tunnel to scrub toxic constituents",
        "Use of gas diffusion membranes to transfer CO_2 into a fluid medium",
        "Catalytic conversion of CO_2 to carbonic acid followed by carbonate precipitation"
    ],
    "materials": [
        "Magnesium-containing minerals (e.g., dolomite)",
        "Calcium silicate minerals",
        "Weak acids (e.g., dilute sulfuric acid)",
        "Bases (e.g., sodium hydroxide)",
        "Water",
        "Ionized water",
        "Catalysts for CO_2 conversion",
        "Gas diffusion membranes"
    ],
    "energy_sources": [
        "Heat from flue gas",
        "Electricity for plasma arcs and compressors",
        "Mechanical energy for pumps and compressors"
    ],
    "inputs": [
        "Flue gas containing CO_2, SO_2, NO_x, CO",
        "Water",
        "Acid solution",
        "Base solution",
        "Hydrogen (for some processes)",
        "Methane",
        "Oxygen (from air separation)",
        "Hydrocarbon fuel"
    ],
    "outputs": [
        "Solid magnesium or calcium carbonates",
        "Compressed or liquefied CO_2",
        "Recovered hydrogen",
        "Recovered methane",
        "Cleaned exhaust gas (reduced SO_2, NO_x, particulates)",
        "Oxygen-rich gas stream"
    ],
    "claimed_performance": null,
    "experimental_evidence": null,
    "replication_status": null,
    "keywords": [
        "CO_2 capture",
        "Mineral carbonation",
        "Plasma gasification",
        "Scrubbing",
        "Carbon sequestration",
        "Flue gas treatment",
        "Carbon capture and storage"
    ],
    "related_technologies": [
        "Carbon capture and storage (CCS)",
        "Mineral carbonation",
        "Plasma arc gasification",
        "Ion exchange scrubbing",
        "Membrane gas separation"
    ],
    "controversy_level": "low",
    "confidence_score": 0.8,
    "practicability_score": 0.7,
    "fringe_score": 0.2,
    "evidence_strength": 0.3,
    "risk_score": 0.2,
    "trl_estimate": 7,
    "source_urls": [],
    "organizations": [],
    "applications": [
        "Power-plant emissions reduction",
        "Industrial gas cleaning",
        "Underground CO_2 storage",
        "Hydrogen production with CO_2 capture"
    ],
    "limitations": [
        "High energy demand for heat, compression, and plasma generation",
        "Requirement for large quantities of suitable minerals",
        "Capital cost of retrofitting existing plants",
        "Potential scaling challenges for tunnel-based scrubbing systems"
    ],
    "open_questions": [
        "Economic viability at commercial scale",
        "Long-term stability of mineral carbonate storage",
        "Integration with existing power-plant infrastructure",
        "Optimization of energy use versus CO_2 capture efficiency"
    ],
    "red_flags": [],
    "evidence_quotes": []
}