{
    "title": "Alcohol-Benzene-Water Fuel",
    "inventor_name": "Alfred Coreth",
    "publication_year": 1935,
    "device_name": "Corethstoff",
    "goal": "Provide a cheaper, higher-mileage internal-combustion engine fuel that is non-explosive and can be used without engine modification.",
    "problem_addressed": "Reliance on expensive gasoline and the need for more efficient, safer automotive and aviation fuels.",
    "concept_summary": "Corethstoff is a fuel mixture consisting mainly of water, raw (crude) alcohol, and a hydrocarbon carrier such as benzene, wood oil, or paraffin oil. The mixture contains at least 10 % water, which is absorbed by the alcohol and oil components. The resulting blend can be poured into any internal-combustion engine, delivering comparable power to gasoline while claiming 20 % greater range, reduced knocking, lower combustion temperature, and non-explosive properties.",
    "detailed_description": "The invention builds on known alcohol-benzene-water mixtures but increases the water content by using impure crude alcohol (containing empyreumatic oil) and wood-spirit oils that promote water absorption. Various formulations are described, e.g., 40-45 % crude benzole, 40-45 % crude alcohol (85  deg C), and 10-20 % water, or alternatives replacing benzene with wood oil, tung oil, or paraffin oil. The fuel is claimed to keep engine cylinders free of carbon deposits, run without knocking, emit odorless exhaust, and provide at least the same power as gasoline while consuming less heat.",
    "category": "Mechanical Engineering",
    "principles": [
        "Solvent-mediated water absorption in alcohol-oil mixtures",
        "Low-temperature combustion",
        "Knock suppression by water content"
    ],
    "scientific_domains": [
        "Chemistry",
        "Mechanical Engineering",
        "Energy"
    ],
    "mechanisms_of_action": [
        "Water dilutes the fuel, reducing peak combustion temperature",
        "Alcohol provides combustible energy",
        "Hydrocarbon carrier (benzene, wood oil, etc.) dissolves water and alcohol"
    ],
    "materials": [
        "Water",
        "Crude alcohol (~=85 % ethanol)",
        "Benzene",
        "Wood oil / wood-spirit oil",
        "Tung oil",
        "Paraffin oil",
        "Crude benzole"
    ],
    "energy_sources": [
        "Chemical energy of the fuel mixture"
    ],
    "inputs": [
        "Raw alcohol (with impurities)",
        "Water",
        "Benzene or wood-oil homologues",
        "Optional additives (tung oil, paraffin oil, etc.)"
    ],
    "outputs": [
        "Mechanical power (engine output)",
        "Combustion gases (CO_2, H_2O, trace hydrocarbons)",
        "Heat"
    ],
    "claimed_performance": "20 % greater mileage than gasoline; non-explosive and practically non-inflammable; engines run without knocking; cylinders remain free of carbon deposits; low combustion heat; odorless exhaust.",
    "experimental_evidence": "The article reports that the fuel \"passes tests\" and that \"the cylinders of internal combustion engines is not calaminent; combustion takes place with a very low heat while providing at least as much power as when burning gasoline; engines are running, whatever happens, without knocking and exhaust gas has no odor.\"",
    "replication_status": null,
    "keywords": [
        "alternative fuel",
        "water-alcohol blend",
        "bio-fuel",
        "engine performance",
        "knock reduction"
    ],
    "related_technologies": [
        "Ethanol-gasoline blends (E-fuel)",
        "Water-in-fuel injection systems",
        "Low-temperature combustion engines"
    ],
    "controversy_level": "medium",
    "confidence_score": 0.85,
    "practicability_score": 0.6,
    "fringe_score": 0.4,
    "evidence_strength": 0.3,
    "risk_score": 0.2,
    "trl_estimate": 5,
    "source_urls": [
        "http://www.bibliotecapleyades.net/ciencia/supressed_inventions/suppressed_inventions45.htm",
        "http://eresources.nlb.gov.sg/newspapers/Digitised/Article/straitstimes19350923-1.2.131.aspx",
        "https://news.google.com/newspapers?nid=2268&dat=19360104&id=jG0mAAAAIBAJ&sjid=9gAGAAAAIBAJ&pg=6035,2466066&hl=en",
        "http://fultonhistory.com/Newspapers%2023/kings%20Ferry%20NY%20%20Southern%20%20Cayuga%20Tribune/kings%20Ferry%20NY%20%20Southern%20%20Cayuga%20Tribune%201935-1936/kings%20Ferry%20NY%20%20Southern%20%20Cayuga%20Tribune%201935-1936%20-%200430.pdf",
        "http://paperspast.natlib.govt.nz/cgi-bin/paperspast?a=d&d=CHP19350726.2.37.8"
    ],
    "organizations": [],
    "applications": [
        "Automobile fuel",
        "Aircraft fuel"
    ],
    "limitations": [
        "Water content limited by solubility; excessive water may cause engine issues",
        "Performance claims lack independent, quantitative testing",
        "Potential for corrosion or material compatibility problems in long-term use"
    ],
    "open_questions": [
        "What is the long-term effect of water-rich fuels on engine wear and corrosion?",
        "How does the fuel's energy density compare to modern gasoline or diesel on a per-liter basis?",
        "Can the mixture be produced at scale with consistent quality?"
    ],
    "red_flags": [
        "Reliance on anecdotal newspaper reports rather than peer-reviewed data",
        "No independent replication or modern testing documented",
        "Claims of \"20 % farther\" mileage without quantitative methodology"
    ],
    "evidence_quotes": [
        "\"Passes tests\" - Modern Mechanix and Inventions",
        "\"The cylinders of internal combustion engines is not calaminent; combustion takes place with a very low heat while providing at least as much power as when burning gasoline; engines are running, whatever happens, without knocking and exhaust gas has no odor.\"",
        "\"Because of its non-explosive and practically non-inflammable qualities, Corethstoff is being considered as an airplane fuel.\"",
        "\"The new fuel, called Corethstoff, is composed largely of water and raw alcohol and can be used in any type of internal combustion motor without alteration of engine or carburetor.\"",
        "\"It is not only cheaper to produce than gasoline, but goes 20 percent farther as well, the inventor claims.\""
    ]
}