ASTM D240 PDF
15 Sep STANDARD TEST METHOD FOR HEAT OF COMBUSTION OF LIQUID HYDROCARBON FUELS BY BOMB CALORIMETER. This test method. 2 Sep Standard Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter. This test method covers the determination of. 14 Jun The heat of combustion is a measure of the energy available from a fuel.
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Significance and Use The heat of combustion is a measure of the energy available from a fuel.
ASTM D – International Standards
Temperatures can be measured in degrees Celsius. If results do not come within this range, the technique of handling the sample may have to be changed. Do not purge the bomb to remove entrapped air Warning – be careful not to overcharge the bomb. Discard the test if unburned sample or sooty deposits are found.
Test Room The room in which the calorimeter is operated must be free from drafts and not subject to any sudden temperature changes. Base metal alloy crucibles are acceptable if after a few preliminary firings the weight does not change significantly between tests. The capsule should only be handled with forceps.
Stand away from outlet when opening cylinder valve. A watch or other timing device capable of measuring time to 1s is required for use with the isothermal jacket calorimeter. Temperatures can be recorded in either degrees Fahrenheit or ohms or other units when using electric thermometers.
Leave a Reply Cancel reply Your email address will not be published. The calorimeter shall be completely enclosed within a stirred water jacket and supported so that its sides, top and bottom are approximately 10mm from the jacket wall. Keep away from heat, sparks, and open flame.
Do not use for inhalation purposes. Timing Device – A watch or other device capable of measuring time to 1s is required for use with the isothermal jacket calorimeter. If the bomb is lined with platinum or gold, all openings shall be sealed to prevent combustion products from reaching the base metal. 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.
The bomb must be capable of withstanding a hydrostatic pressure test to a gauge pressure of psi 20MPa at room temperature, without stressing any parts beyond its elastic limit.
The products satm combustion, in oxygen, are gaseous carbon dioxide, nitrogen oxides, sulfur dioxide, and liquid water. Avoid breathing dusts or mists.
ASTM D240-02 – International Standards
The same ambient conditions must be maintained for all experiments, including standardization. Add the sample to the cup by inserting the tip of the needle through the tap disk at a point so that the flap of tape will cover the puncture upon removal of the needle. If the bomb is lined with platinum or gold, all openings shall be sealed to prevent combustion products from reaching the base metal.
Remove from the balance with forceps. Commercial oxygen produced from liquid air can generally be used without purification. Masses are measured in grams and no buoyancy corrections are applied.
Summary of Test Method Heat of combustion is determined in this test method by burning a weighed sample in an oxygen bomb calorimeter under controlled conditions. Petroleum Products and Biofuel lab apparatus baths, calorimeters, color measurement, density meters, flash point, hydrogenators, oil testing, penetrometers, surface tension, vapor pressure, viscometers and rheometers, Its size aetm be such that the bomb will be completely immersed in water when the calorimeter is assembled.
The jacket can be arranged so as to remain substantially constant temperature, ashm with provision for rapidly adjusting the jacket temperature to equal that of the calorimeter for adiabatic operation.
Multiple bomb choices are also available, expanding its functionality for higher energy releases An isoperibol calorimeter is one where the surrounding jacket is maintained at a constant temperature while the temperature of the bomb and sstm rise as heat is released atsm the combustion.
Do not drop cylinder. Do not use cylinder without label. In these implementations, a controlled-temperature jacket completely surrounds the combustion bomb and its “bucket”.
See compressed gas association booklets G-4 and G This test method covers the determination of the heat of combustion of liquid hydrocarbon fuels ranging in volatility from that of light distillates to that of residual fuels.
Benzoic Acid, Standard – Benzoic acid powder must be compressed into a tablet or pellet before weighing. A Wheatstone bridge and galvanometer capable of measuring resistance of s240.
Koehler K88900 / K88990 Bomb-type Calorimeter
Wash c240 interior of the bomb, including the electrodes and sample holder, with a fine jet of water and quantitatively collect the washings in a breaker.
Thermostatic control of room temperature and controlled relative humidity are desirable. Oxygen – Commercial oxygen produced from liquid air can be used without purification. Right-click to open the PDF in a new window or download it: Vapors may cause flash fire.
The products of combustion, in oxygen, are carbon dioxide, nitrogen oxides, sulfur dioxide, and water, all in the gaseous state. The quantity of energy released when a unit mass of fuel is burned in a constant volume enclosure, with the products being gaseous, other than water that is condensed to the asttm state.
The range of such craft between refueling is a direct function of the heat of combustion and density of the fuel. Determine sulfur by analyzing the bomb washings remaining after the acid titration, using the procedure described in Test Methods D, D, D, D, D, or D Use the same units in all calculations, including standardization. Thermometers – Temperatures in the calorimeter and jacket shall be measured with the following thermometers or combinations thereof: Adequate facilities for lighting, heating, and ventilating shall be provided.
Allow 5 min for attainment of equilibrium, then record the calorimeter temperatures at 1-min intervals for 5 min.
The values stated in SI units are to be regarded as standard.