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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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 BTU used in modern steam tables is defined by the means of the relation, 1 I. Heat of Formation – the change in heat content resulting from the formation of 1 mole of a substance from its elements at constant pressure. For calorimeters having a bucket it can be a separate component of the bomb. Thermostatic control of room temperature and controlled relative humidity are desirable. Oxygen – Manufactured from liquid air, guaranteed to be greater than 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.
This test method pertains to the determination of the gross calorific value of coal and coke by either an isoperibol or adiabatic bomb calorimeter. Notify me of follow-up comments by email. The first and most obvious is the temperature sensing probe itself.
Use the same type and length or mass of ignition fuse for 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. Your email axtm will not be published.
Reagent Water – Conforming to conductivity requirements for Type II of Specification D for preparation of reagents and washing of the bomb interior. The following precautions are recommended for safe calorimeter operation.
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.
Standard Test Method for Gross Calorific Value of Coal and Coke
Chassis Name and Number. Calorimeter Vessel – Made of metal with a tarnish-resistant coating, with all outer surfaces highly polished.
It determines when the calorimeter is in equilibrium and ignites the sample and determines when the calorimeter has reached equilibrium after ignition.
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. Save my name, email, and site URL in my browser for next time I post a comment. The vessel shall be of such construction that the environment of the calorimeter’s entire outer boundaries can be maintained at a uniform temperature.
A stirrer shall be provided for uniform mixing of the water.
Standard – Standard Test Method for Gross Calorific Value of Coal and Coke ASTM D –
The values stated in SI units are to be regarded as standard. In particular, lignite and sub-bituminous rank coal samples may experience greater oxidation effects than samples of higher rank coals. Assessing the valid working range of the calorimeter, as outlined in One milliliter of this solution is 1. There shall be no gas leakage. Sample Holder – An open crucible or platinum, quartz, or base metal alloy. 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.
These types of thermometers consist of two major subsystems. Valves, gauges, and gaskets shall meet industry safety codes. Thermometer Accessories – A magnifier is required for reading liquid-in-glass thermometers to one tenth of the smallest scale division.
Ignition Circuit – A V alternating or direct current is required for ignition purposes. The gross calorific value can be used to evaluate the effectiveness ast, beneficiation processes.
Thermometers – Platinum resistance or thermistor thermometers – shall be capable of measuring to the nearest 0. Mechanical supports for the calorimeter vessel shall be of low thermal conductivity.