ASTM D5865 PDF
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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Its size shall be such that the bomb is completely immersed in water during determination. Equip the oxygen supply cylinder with an approved type astn safety device, such as a relief valve, in addition to the needle valve and pressure gauge used in regulating the oxygen feed of the bomb.
Oxygen – Manufactured from liquid air, guaranteed to be greater than A convenient standard solution may be prepared as follows. 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. Platinum or palladium wire, 0. Replace O-Rings and valve seats in accordance with manufacturer’s instruction. 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.
The bomb shall be designed so that all liquid combustion products can be completely recovered by washing the inner surfaces. 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. These types of thermometers consist of two major subsystems. Notify me of new posts by email.
The immersed portion of the stirrer shall be accessible to the outside through a coupler of low thermal conductivity. Ignition Circuit – A V alternating or direct current is required for ignition purposes. An ammeter or pilot light can be used in the circuit to indicate when current is flowing. Mechanical supports for the calorimeter vessel shall be of low thermal conductivity.
Assessing the valid working x5865 of the calorimeter, as outlined in Discussion – The heat capacity can also be referred to as the energy equivalent or water equivalent of the calorimeter. Adiabatic Calorimeter – a calorimeter that operates in the adiabatic mode and may or may not use a microprocessor.
Thermostatic control of room temperature and controlled relative humidity are desirable. For more details, consult the manufacturer.
ASTM D5865-12 – International Standards
Notify me of follow-up comments by email. One milliliter of this solution is 1. This standard does not purport to address all of the safety concerns, if any, associated with its use.
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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. The initial temperature before initiating the combustion and the final temperatures are recorded by the operator or the microprocessor.
Sample Holder – An open crucible or platinum, quartz, or base metal alloy. Titiration Indicator – Methyl orange, methyl red, or methyl purple for indicating the end point when titrating the acid formed during combustion. Oxidation of coal after sampling can result in a reduction of calorific value. Do not fire the bomb if the bomb has been dropped or turned over after loading. 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.
Thermometers – Platinum resistance or thermistor thermometers – shall be capable of measuring to the nearest 0. The bomb shall be capable of withstanding a hydrostatic pressure test to 20 MPa psig at room temperature without stressing any part beyond its specified elastic limit. Suitable reducing valves and adapters for 3- to 4-MPa to psig discharge pressure can be obtained from commercial sources of compressed gas equipment.
Replace cracked or significantly worn parts.
It determines when the calorimeter is in equilibrium and ignites the sample and determines when the calorimeter has reached equilibrium sstm ignition. The heat capacity of the calorimeter is determined by burning a specified mass of benzoic acid in oxygen. Net Calorific Value net heat of combustion at constant pressureQp net – the heat produced by combustion of a substance at d5856 constant pressure of 0.
The gross calorific value can be used to evaluate the effectiveness of beneficiation processes.
The resulting concentration 0. The magnifier shall have a lens and dd5865 designed so as to d58665 errors as a result of parallax. The following precautions are recommended for safe calorimeter operation. The results of combustion calorimetric tests of fuel for steam power plants may be expressed in terms of the International Steam Table calorie I. The vessel shall be of such construction that the environment of the calorimeter’s entire outer boundaries can be maintained at a uniform temperature.
The gross calorific value can be used for d55865 the calorific value versus sulfur content to determine whether the coal meets regulatory requirements for industrial fuels. The traceability of the heat of combustion of the benzoic acid calibrant in addition to meeting the aforementioned criteria.
Calorimeter Vessel – Made of metal with a tarnish-resistant coating, with all outer surfaces highly polished.
Standard – Standard Test Method for Gross Calorific Value of Coal and Coke ASTM D –
A step-down transformer connected to an alternating current circuit, capacitors, or batteries can be used. 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.
No other units of measurement are included in this standard. Specific hazard statements are given in Section 8. Chassis Name and Number. In particular, lignite and sub-bituminous rank coal samples may experience greater oxidation effects than samples of higher rank coals. Unnecessary asrm of the samples to the air for the time of sampling or delay in analysis shall be avoided.
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.