Ignition temperature metals

Occurrence. Carbon monoxide is a product of incomplete combustion and is not likely to result where a flame bums in an abundant air supply, yet may result when a flame touches a cooler surface than the ignition temperature of the gas. Gas or coal heaters in the home and gas space heaters in industry have been frequent sources of carbon monoxide poisoning when not provided with effective vents. Gas heaters, though properly adjusted when installed, may become hazardous sources of carbon monoxide if maintained improperly. Automobile exhaust gas is perhaps the most familiar source of carbon monoxide exposure. The manufacture and use of synthesis gas, calcium carbide manufacture, distillation of coal or wood, combustion operations, heat treatment of metals, fire fighting, mining, and cigarette smoking represent additional sources of carbon monoxide exposure (105—107). 

Metal Incendiaries. Metal incendiaries include those of magnesium in various forms, and powdered or granular aluminum mixed with powdered iron(III) oxide. Magnesium is a soft metal which, when raised to its ignition temperature, bums vigorously in air. It is used in either soHd or powdered form as an incendiary filling, and in alloyed form as the casing for small incendiary bombs. 

Special Hazards of Combustion Products Not pertinent Behavior in Fire May explode in fires Ignition Temperature Not flammable Electrical Hazard Not pertinent Burning Rate Not flammable. Chemical Reactivity - Reactivity with Water No reaction Reactivity with Common Materials Dirt and metals can cause rapid decomposition with the liberation of oxygen gas Stability During Transport Pure grades are stable, but contamination by dirt and metals can cause rapid or violent decomposition Neutralizing Agents for Acids and Caustics Not pertinent Polymerization Not pertinent Inhibitor of Polymerization Not pertinent. 

Fire Hazards - Flash Point Not flammable, but may cause or increase the intensity of a fire Flammable Limits in Air (%) Not flammable Fire Extinguishing AgerUs Not pertinent Fire Extinguishing Agents Not To Be Used Not pertinent Special Hazards of Combustion Products Not pertinent Behavior in Fire Can form explosive mixture with combustible material or finely powdered metals. Increases the intensity of fires Ignition Temperature Not pertinent Electrical Hazard Not pertinent Burning Rate Not pertinent. 

Ignition Temperatures of Metals in Oxygen Atmospheres , CombstnSci Technol 3,77 (1971) 15) J.T, Bryant, The Combustion of... 

Fuel treatments have been used for very many years as an aid to improving the combustion efficiency process. Old formulations often used saw dust, wood flour, common salt, zinc sludge, ground oyster shell, and similar crude ingredients, but could still provide a dramatic effect when thrown into a fire. The metallic salts present (sodium in salt, zinc in sludge, and calcium in shell) acted as catalysts that dramatically lowered the ignition temperature of soot deposits from around 1100 °F/590 °C to only 600 °C/315 °C the fire burned vigorously and the soot disappeared. 

Lesnikovich, L. I. et al., Chem. Abs., 1975, 83, 149760 1976, 85, 7929 Mixtures of the alkene and perchloric acid vapour (5 1 molar) in nitrogen ignite spontaneously at 250°C. Some metal oxides of low specific surface reduced the ignition temperature below 178°C. 

Table V. Effect of Metal Ions on the Minimum Ignition Temperature (in Oxygen) of Cottonwood Chars...

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