ASTM D Standard Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter (Precision Method). ASTM D – Heat of Combustion. Significance and Use. The heat of combustion is a measure of the energy available from a fuel. A knowledge of this . Buy ASTM D TEST METHOD FOR HEAT OF COMBUSTION OF LIQUID HYDROCARBON FUELS BY BOMB CALORIMETER.

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It must be constructed so that any water evaporating from the jacket will not condense on the calorimeter bucket. Benzoic Acid – The acid must be pelleted before use. The energy unit of measurement employed in this test method is the joule with the heat of combustion reported in mega joules per kilogram. It can be used for a wide range of volatile and nonvolatile materials where slightly greater differences in precision can be tolerated. Initially determine the energy equivalent by averaging six determinations made using benzoic acid over a period of at least 3 days.

Standard Test Methods Compliance

Either isoperibol or adiabatic calorimeters may be used. Adequate facilities for aetm, heating, and ventilation should be provided. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Each of these thermometers shall have been tested for accuracy at intervals no larger than 1. For specific warning statements, see Section 7, All parts shall be constructed of materials that are not affected by the combustion process or products sufficient to introduce measurable heat input or alteration of end products. The heat of combustion is a measure of the energy available from a fuel. It shall have a device for stirring the water thoroughly and at a uniform rate but with minimum d480 input.

Have a question or would like to request a quote? No buoyancy corrections are applied except to obtain the mass of benzoic acid.

ASTM D4809 – Heat of Combustion

Sample Cup – A low-form platinum cup, 26mm in diameter and 11mm deep with a spun rim. Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination.


The bomb must be designed so that all liquid combustion products can be completely recovered by washing the inner surfaces. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such specifications are available.

Automatic Calorimeter Microprocessor Controller – in place of manually recording temperature and calculating the energy equivalent, an automatic controller may be used. If not, continue to run until six determinations establish a value that has a RSD of 0. Please click below to submit your question to our staff and someone will be in contact with you shortly Submit Question Request a Quote Clark Testing has been providing product qualification testing and design verification for manufactures for over 20 years.

Historical Version s – view previous versions of standard. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Oxygen – Commercial oxygen produced from liquid air can be used without purification Warning – Oxygen vigorously accelerates combustion. Evolution of heat produces a violent reaction or eruption upon too rapid mixture with water.

ASTM D – International Standards

If the thermistors are taped to asm thermometers, it can be done in such a manner that the sensing elements are at the midpoint of the thermometer bulbs. No other units of measurement are included in this standard.

The net heat of combustion at constant pressure of a liquid or solid fuel containing only the elements carbon, hydrogen, oxygen, nitrogen, and sulfur is the quantity of heat liberated when a unit mass of the fuel is burned in oxygen at a constant pressure of 0.

Purity of Water – Unless otherwise indicated, references to water shall be understood to mean reagent water conforming to Specification D, Type IV or better.

The heat of combustion is determined by burning a weighed samples in an oxygen-bomb calorimeter under controlled conditions. The temperature increase is measured by a temperature reading instrument which allows the precision of the test method to be met. Jacket – The calorimeter bomb, bucket, and water shall be completely enclosed within a stirred water jacket and supported so that its sides, top, and bottom are approximately qstm from the jacket walls.


Energy Equivalent of the Calorimeter – Benzoic Acid shall be used as the primary standard Warning – Oxygen vigorously accelerates combustion.

Work Item s – proposed revisions of this standard. This astj does not purport to address the safety concerns, if any, associated with its use. Notify me of follow-up comments by email. Position the liquid-in-glass thermometer so that the bulb is halfway to the bottom of the v4809 and locate the thermistor with its sensing element at about the midpoint of the thermometer bulb.

There must be no gas leakage during a test. We provide our clients with independent testing.

ASTM D – Heat of Combustion – Clark Testing

Pressure-Sensitive Tape – Cellophane tape 38mm wide, free of chlorine and sulfur. Semi-micro Analytical Balance, having a sensitivity of 0. Net Heat of Combustion – expressed as mega joules per kilogram. A knowledge of this value is essential when considering the thermal efficiency of equipment for producing either power or heat. Can cause severe burns or blindness. In order to attain this precision, strict adherence to all details of the procedure is essential since the error contributed by each individual measurement that affects the precision shall be kept below 0.

Continuous stirring for 10 min shall not raise the temperature more than 0. If necessary, modify the bomb such that the feet are 12mm high to allow for better water circulation under the bomb. Its magnitude is particularly important to weight-limited vehicles such as airplanes, surface effect vehicles, and hydrofoils as the disturbance such craft can travel on a given weight of fuel is a direct function of the fuel’s mass heat of combustion and its density.

The mass heat of combustion, that is, the heat of combustion per unit mass of fuel, is measured by the procedure.