Selective Catalytic Reduction

{
  "id": "MLC-T-ENV-025148",
  "term": "Selective Catalytic Reduction",
  "field": "Environment",
  "definition": "1. An emissions control technology that reduces NOx by injecting a controlled amount of a reductant (usually urea or ammonia) into the gaseous exhaust stream ahead of a catalyst. An SCR system usually includes a reductant storage and injection system, a control unit, and one catalyst.\n\n2. Noncombustion control technology that destroys NOX by injecting a reducing agent (e.g., ammonia) into the flue gas that, in the presence of a catalyst (e.g., vanadium, titanium, or zeolite), converts NOX into molecular nitrogen and water.",
  "abbreviation": "SCR",
  "references": [
    "Environmental Technology Verification Protocol, Determination of Emission Reductions from Selective Catalytic Reduction Control Technologies for Highway, Nonroad, and Stationary Use Diesel Engines, prepared by RTI International for EPA at http://www.epa.gov/etv/pubs/05_vp_emissions.pdf",
    "40 CFR 76.2 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/selective-catalytic-reduction/"
}