ASTM D240 PDF
STANDARD TEST METHOD FOR HEAT OF COMBUSTION OF LIQUID HYDROCARBON FUELS BY BOMB CALORIMETER. This test method. The heat of combustion is a measure of the energy available from a fuel. ASTM D Standard Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter.
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If the bomb is lined with platinum or gold, all openings shall be sealed to prevent combustion products from reaching the base metal. Save my name, email, and site URL in my browser for next time I post a comment. Leave a Reply Cancel reply Your email address will not be published. Type text as it appears:: A knowledge of this value is essential when considering the thermal efficiency 2d40 equipment for producing either power or heat.
It is a good choice for high precision quality control work and for research and development. Test Room – The room in which the calorimeter is operated must be free from drafts and not subject to sudden temperature changes. A Wheatstone bridge and galvanometer capable of measuring resistance of 0. Fill a hypodermic syringe with the sample. General Use laboratory apparatus balances, baths, blenders, centrifuges, chart recorders, freezers, fume hoods, furnaces, glassware washers, glove boxes, mixers, moisture testing, ovens, pumps, shakers, vacuum equipment, water purification Add the sample to the capsule.
Place the zstm in the curved electrode and arrange the fuse wire so that the central portion of the loop contacts the capsule and oil. This standard does not purport to address all of the safety concerns, if any, associated with its use. Release regulator tension before opening cylinder valve.
The water can be measured volumetrically if it is measured always at the same temperature. Discard the test if unburned sample or d2240 deposits are found. Observations, Adiabatic Jacket Method – Assemble the calorimeter in the jacket and start the stirrers. Thermometer Accessories – A magnifier is required for reading liquid-in-glass thermometers to one tenth of the smallest scale division.
Koehler K88900 / K88990 Bomb-type Calorimeter
Enter product namemake or model. What are your requirements. Weight of Sample – Control the weight of sample including the auxiliary fuel so that the temperature rise produced asmt its combustion will be equal to that of 0. The products of combustion, in oxygen, are carbon dioxide, nitrogen oxides, sulfur dioxide, and water, all in the gaseous state. Keep away from heat, sparks, and open flame. The mass heat of combustion, the heat of combustion per unit mass of fuel, is a critical property of fuels intended for use in weight-limited craft such as airplanes, surface effect vehicles, and hydrofoils.
Reweigh the cup with capsule and sample. This procedure is acceptable, provided it is used in all tests, including standardization.
Do not exceed the sample size limits. Either isothermal or adiabatic calorimeter jackets can be used. Use a minimum of wash water, preferably less than ml.
ASTM D – International Standards
For highly volatile fluids, reduce loss with use of tape or gelatin capsule mineral oil. Oxygen – with the test sample and fuse in place, slowly charge the bomb with oxygen to 3.
Take calorimeter readings at 1-min intervals until the same temperature is observed in three successive readings. Isothermal Jacket Method 1. Record the difference as wire consumed. When mixing with water, add slowly to surface of solution to avoid violent splattering. If results do not come within this range, the technique of handling the sample may have wstm be changed.
Keep cylinder from corrosive environment. Analysis of Bomb Contents – Remove the bomb and release the pressure at a uniform rate such that the operation will require not less than 1 minute. Do not use dented or damaged cylinders. Keep cylinder valve closed when not in use. Oxygen Purification Device – Commercial oxygen produced form liquid air can generally be used without purification. Adequate facilities for lighting, heating, and ventilating shall be provided. Use the same units in all calculations, including standardization.
Do you need a bomb type or differential scanning type? Observations, Qstm Jacket Method – Assemble the calorimeter in the d40 and start the stirrer.
Stand away from outlet when opening cylinder valve. Record the initial temperature and fire the charge. Benzoic acid pellets for which the heat of combustion has been determined by comparison with the National Bureau of Standards sample are obtainable commercially for those laboratories not equipped to pellet benzoic acid. If this is not possible or does not correct the error, run a series of tests using 2,2,4-trimethylpentane to establish the energy equivalent for use with volatile fuels.
Pressure-Sensitive Tape – Cellophane tape 38mm 1.