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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The products of combustion, in oxygen, are gaseous carbon dioxide, nitrogen oxides, sulfur dioxide, and liquid water.

A Wheatstone bridge and galvanometer capable of measuring resistance of 0. Astmm Accessories – A magnifier is required for reading liquid-in-glass thermometers to one tenth of the smallest scale division. Water in bomb – Add 1. Remove from the balance with forceps. Repeat the standardization tests after changing any part of the calorimeter and occasionally as a check on both calorimeter an operating technique.

Test Room – The room in which the calorimeter is operated must be free from drafts and not subject to sudden temperature changes. Request a Free Quote Right Now. Notify me of new posts by email. Discard the test if unburned sample or sooty deposits are found.

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. Do not take internally. Record the difference as wire consumed. Base metal alloy crucibles are acceptable if after a few preliminary firings the weight does not change significantly between tests.


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 bucket rise as heat is released by the combustion.

If the heat of axtm is required on a clean fuel, filter the sample to remove free water and insoluble ash before testing. Some fuels contain water and particulate matter ash that will degrade calorimetric values. The bomb must be designed so that all liquid combustion products can be completely recovered by washing the inner surfaces. The heat of combustion as determined by this test method is designated as one of the chemical and physical requirements of both commercial and military turbine fuels and aviation gasoline.

Use only with equipment conditioned for oxygen service by carefully cleaning to remove oil, grease, and other aztm. All parts are to be constructed of materials which are not affected by the combustion process or products sufficiently to introduce measurable heat input or alteration of end products.

Koehler K88900 / K88990 Bomb-type Calorimeter

If purification is necessary, see A1. Oxygen – Commercial oxygen produced from liquid air can be used without purification. Timing Device – A watch or other device capable of measuring time to 1s is required for use with the isothermal jacket calorimeter.

Record the initial temperature and fire the charge. Discard the sample, unless it has lost no weight, as shown by reweighing. Enter product namemake or model.


Tape – place a piece of pressure-sensitive tape across the top of the cup, trim around the edge with a razor blade, and seal tightly. Use with adequate ventilation. The jacket can be arranged so as to remain substantially constant temperature, or with provision for rapidly adjusting the jacket temperature to equal that of the calorimeter for adiabatic operation. Determine the sulfur content of the sample if it exceeds 0.

Weight of Sample – Control the weight of sample including the auxiliary fuel so that the temperature rise produced by its combustion will be equal to that of 0. Observations, Adiabatic Jacket Method – Assemble the calorimeter in the jacket and start the stirrers.

Determine sulfur by analyzing the bomb washings remaining after the astn titration, using the procedure described in Test Methods D, D, D, D, D, or D Weigh the sample to the nearest 0.

ASTM D – International Standards

Shorter lengths may be used if the same length is employed in all tests, including standardization tests. Notify me of follow-up comments by email. Seal down the flap by pressing lightly with a metal spatula. Do not use dented or damaged cylinders.