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.
|Published (Last):||8 February 2009|
|PDF File Size:||9.91 Mb|
|ePub File Size:||10.92 Mb|
|Price:||Free* [*Free Regsitration Required]|
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. Equip the oxygen supply cylinder with an approved type of safety device, such as a relief valve, in addition d585 the needle valve and pressure gauge used in regulating the oxygen feed of the bomb.
The mass of sample and any combustion aid as well as the pressure of the oxygen admitted to the bomb shall not exceed the bomb manufacturer’s specifications. Heat Capacity – the energy required to raise the temperature of the calorimeter one arbitrary unit. The traceability of the heat of combustion of the benzoic acid calibrant in addition to meeting the aforementioned criteria. One milliliter of this solution is 1. An ammeter or pilot light can be used in the circuit to indicate when current is flowing.
Suitable reducing valves and adapters for 3- to 4-MPa to psig discharge pressure can be obtained from commercial sources of compressed gas equipment. 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. Platinum or palladium wire, 0.
D586 same indicator shall be used for both calibration and calorific value determinations. The first and most obvious is the temperature sensing atm itself. Discussion – The heat capacity can also be referred to as the energy equivalent or water equivalent of the calorimeter.
The heat capacity of the calorimeter is determined by burning a specified mass of d58665 acid in oxygen. Notify me of follow-up comments by email.
The immersed portion of the stirrer shall be accessible to the outside through a coupler of low thermal conductivity. 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.
Corrected Temperature Rise – the calorimeter temperature change caused by the process that occurs inside the bomb corrected for various effects. R5865 O-Rings and valve seats in accordance with manufacturer’s instruction.
The second and equally important d58665 is the measurement subsystem.
ASTM D – 13 Standard Test Method for Gross Calorific Value of Coal and Coke
A convenient standard solution may be prepared as follows. The following precautions are recommended for safe calorimeter operation. 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. Leave a Reply Cancel reply Your email address will not be published.
For manually operated calorimeters, the ignition switch shall be depressed only long enough to fire the charge. Net Calorific Value net heat of combustion at constant pressureQp net – the heat produced by combustion of a substance at a constant pressure of 0.
The calorific value of benzoic acid, for us in the calibration calculations, shall be traceable to a recognized certificate value. Your email address will not be published.
ASTM D5865 – 13
Crucible Liner – Quartz fiber or alundum for lining the crucible to promote complete combustion of samples that do not burn completely during the determination of the calorific value. Chassis Name and Number. For both subsystems, the relationship between the thermometer resistance and temperature shall be well characterized.
The gross calorific value can be used to compute the total calorific content of the quantity of coal or coke represented by the sample for payment purposes. Titiration Indicator – Methyl orange, methyl red, or methyl purple for indicating the end point when titrating the acid formed during combustion. Its size shall be such that the bomb is completely immersed in water during determination.
Ignition Fuse – Ignition fuse of mm length and 0. For more details, consult the manufacturer. Replace cracked or significantly asym parts. 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.
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.