ASTM-D – Download as PDF File .pdf), Text File .txt) or read online. Find the most up-to-date version of ASTM D at Engineering ASTM D Standard Test Method for Gross Calorific Value of Coal and Coke. standard by ASTM International, 10/01/ View all product details.
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Heat of Formation – the change in heat content resulting from the formation of 1 mole of a substance from its elements at constant pressure. Gross Calorific Value gross heat of combustion at constant volumeQv gross – the heat produced by complete combustion of a substance at constant volume with all water formed condensed to a liquid.
Standard Test Method for Gross Calorific Value of Coal and Coke
Isoperibol Calorimeter – a calorimeter that operates in the isoperibol mode and uses a microprocessor to record the initial and final temperatures and make the appropriate heat leak corrections during the temperature rise. Oxidation of coal after sampling can result in a reduction of calorific value. Corrected Temperature Rise – the calorimeter temperature change caused by the process that occurs inside the bomb corrected for various effects.
Notify me of follow-up comments by email. Leave a Reply Cancel reply Your email address will not be published. The balance shall be checked weekly, at a minimum, for accuracy. There shall be no gas leakage.
ASTM D5865 – 13
Automated Calorimeter – a calorimeter which has a asrm that takes the thermometric readings and calculates the Calibration Value and the Heat of Combustion Values. For manually operated calorimeters, the ignition circuit switch shall be of the momentary double-contact type, normally open except when held closed by the operator.
An ammeter or pilot light can s5865 used in the circuit to indicate when current is flowing. Its size shall be such that the bomb is completely immersed in water during determination.
In particular, lignite and sub-bituminous rank coal samples may experience greater oxidation effects than samples of higher rank coals. Heat Capacity – the energy required to raise the temperature of the calorimeter one arbitrary unit. This standard does not purport to address all of the safety concerns, if any, associated with its use. A step-down transformer connected to an alternating current circuit, capacitors, or batteries can be used.
Sorry, your blog cannot share posts by email. Calorimeter – a device for measuring calorific value consisting of a bomb, its contents, a vessel for holding the bombtemperature measuring devicesignition leads, water, stirrer, and a jacket maintained at specified temperature conditions. Also consult the calorimeter equipment manufacturer’s installation and operating instructions before using the calorimeter. Reagent Water – Conforming to conductivity requirements for Type II of Specification D for preparation of reagents and washing of the bomb interior.
One milliliter of this solution is 1.
For both subsystems, the relationship between the thermometer resistance and temperature shall be well characterized. Use the same type and length or mass of ignition fuse aastm calorific value determinations as used for standardization. The traceability of the heat of combustion of the benzoic acid calibrant in addition to meeting the aforementioned criteria.
The bomb shall be designed so that all liquid combustion products can be completely recovered by washing the inner surfaces. The bomb shall be capable of withstanding a hydrostatic axtm test to 20 MPa psig at room temperature without stressing any part beyond its specified elastic limit. During ignition of a sample, the operator shall not extend any portion of the body over the calorimeter.
The second and equally important aspect is the measurement subsystem. Check the pressure gauge annually for accuracy or after any accidental over pressures that reach maximum gauge pressure.
Purity of Reagents – Use reagent grade chemicals conforming to the specification of the Committee on Analytical Reagents of the American Chemical Society in all tests.
Replace O-Rings and valve seats in accordance with manufacturer’s instruction.
ASTM D – 13 Standard Test Method for Gross Calorific Value of Coal and Coke
British Thermal Unit BTU – is the amount of heat required to raise the temperature of one pound – mass lbm of liquid water at one atmospheric pressure one degree Fahrenheit at a stated temperature. The stirrer speed shall remain constant to minimize any temperature variations due to stirring. Unnecessary exposure of the samples to the air for astk time of sampling or delay in analysis shall be avoided.
Save my name, email, and site URL in my browser for next time I post a comment. The same aztm shall be used for both calibration and calorific value determinations. For calorimeters having a bucket it can be a separate component of the bomb.
These types of thermometers consist of two major subsystems. Thermostatic control of room temperature and controlled relative humidity are desirable. Combustion Bomb – Constructed of materials that are not affected by the combustion process or the products formed to introduce measurable heat input or alteration of end products. Chassis Name and Number. The c5865 calorific value can be required to classify coals according to Classification D It is the responsibility of the user of this d58655 to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.