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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The following precautions are recommended for safe calorimeter operation. Your email address will not be published. This test method pertains to the determination of the gross calorific value of coal and coke by either an isoperibol or adiabatic bomb calorimeter.
Leave a Reply Cancel reply Your email address will not be published. Titiration Indicator – Methyl orange, methyl red, or methyl purple for indicating the end point when titrating the acid formed during combustion. Automated Calorimeter – a calorimeter which has a microprocessor that takes the thermometric readings and calculates the Calibration Value and the Heat of Combustion Values.
Save my name, email, and site URL in my browser for next time I post a comment. The calorific value of benzoic acid, for us in the calibration calculations, shall be traceable to a recognized certificate value. The gross calorific value can be used to evaluate the effectiveness of beneficiation processes.
Calorimeter – a device for measuring calorific value consisting of a bomb, its contents, a vessel for holding the bombwstm measuring devicesignition leads, water, stirrer, and a jacket maintained at specified temperature conditions.
The calorific value of the analysis sample is computed by multiplying the corrected temperature rise, adjusted for extraneous heat effects, but the heat capacity and dividing by the mass of the sample. Mechanical supports for the calorimeter vessel shall be of low thermal conductivity.
ASTM D – 13 – Standard Test Method for Gross Calorific Value of Coal and Coke
Sorry, your blog cannot share posts by email. 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. The BTU used in modern steam tables is defined by the means of the relation, 1 I. For both subsystems, the relationship between the thermometer resistance and temperature shall be well characterized.
Additional precautions are noted in Practice E The gross calorific value can be used to compute the total calorific asrm of the quantity of coal or coke represented by the sample for payment purposes.
Use the same type and length or mass of ignition fuse for calorific value determinations as used for standardization. Valves, gauges, and gaskets shall meet industry safety codes.
Standard – Standard Test Method for Gross Calorific Value of Coal and Coke ASTM D –
Xstm initial temperature before initiating the combustion and the final temperatures are recorded by the operator or the microprocessor. Inspect the bomb parts carefully after each use.
An ammeter or pilot light can be used in the circuit to indicate when current is flowing. The gross calorific value can be used for computing the calorific value versus sulfur content to determine whether the coal meets regulatory requirements for industrial fuels.
Adiabatic Calorimeter – a calorimeter that operates in the adiabatic mode and may or may not use a microprocessor. Unnecessary exposure of the samples to the air for the time of sampling or delay in analysis shall be avoided. The bomb shall be designed so that all liquid combustion products can be completely recovered by washing the inner surfaces. For calorimeters having a bucket it can be a separate component of the bomb.
Discussion – The heat capacity can also be referred to as the energy equivalent or water equivalent of the calorimeter. Sample Holder – An open crucible or platinum, quartz, or base metal alloy. The results of combustion calorimetric tests of fuel for steam power plants may be expressed in terms of the International Steam Table calorie I.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Reagent Water – Conforming to conductivity requirements for Type II of Specification D for preparation of reagents and washing of the bomb interior.
Standard Test Method for Gross Calorific Value of Coal and Coke
Ignition Fuse – Ignition fuse of mm length and 0. Suitable reducing valves and adapters for 3- to 4-MPa to psig discharge pressure can be obtained from commercial sources of compressed gas equipment. Thermostatic control of room temperature and controlled relative humidity are desirable.
No other units of measurement are included in this standard.
To minimize convection, the sides, top and bottom of the calorimeter vessel shall not be more than 10mm from the inner surface of the jacket. Oxidation of coal after sampling can result in a reduction s5865 calorific value. Continuous stirring for 10 min shall not raise the calorimeter temperature more than 0. The magnifier shall have a lens and holder designed so as to minimize errors as a result of parallax. Controller – For automated calorimeter, capable of charging the bomb; filling the calorimeter vessel; firing the ignition circuit; recording calorimeter temperature before, during and after the test; recording the balance weights; and carrying out all necessary corrections and calculations.
Specific hazard statements are given in Section 8. Thermometer Accessories – A magnifier is required for reading liquid-in-glass thermometers to one tenth of the smallest scale division.
Calorific Value – the heat produced by combustion of a unit quantity of a substance aztm specified conditions. The immersed portion of the stirrer shall be accessible to the outside through a coupler of low thermal conductivity. Notify me of new posts by email.