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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The gross calorific value can be used to evaluate the effectiveness of beneficiation processes. For calorimeters having a bucket it can be a separate component of the bomb. 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.
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. Check the pressure gauge annually for accuracy or after any accidental over pressures that reach maximum gauge pressure. Ignition Fuse – Ignition fuse of mm length and 0. Discussion – The heat capacity can also be referred to as the energy equivalent or water equivalent of the calorimeter.
Assessing the valid working range of the calorimeter, as outlined in The resulting concentration 0. Thermometers – Platinum resistance or thermistor thermometers – shall be capable of measuring to the nearest 0. Chassis Name and Number. The same indicator shall be used for both calibration and calorific value determinations. Thermometer Accessories – A magnifier is required for reading liquid-in-glass thermometers to one tenth of the smallest scale division.
The initial temperature before initiating the combustion and the final temperatures are recorded by the operator or the microprocessor. 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.
Standard Test Method for Gross Calorific Value of Coal and Coke
Suitable reducing valves and adapters for 3- to 4-MPa to psig discharge pressure can be obtained from commercial sources of compressed gas equipment. A stirrer d58665 be provided for uniform mixing of the water.
For manually operated calorimeters, the ignition switch shall be depressed only long enough to fire the charge.
The magnifier shall have a lens and holder designed so as to minimize errors as a result of parallax. 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. Replace O-Rings and valve seats in accordance with manufacturer’s instruction.
Adiabatic Calorimeter – a calorimeter that operates in the adiabatic mode and may or may not use e5865 microprocessor. Inspect the bomb parts carefully after each use. Zstm my name, email, and site URL in my browser for next time I post a comment.
Calorimeter Vessel – Made of metal with a tarnish-resistant coating, with all e5865 surfaces highly polished. The calorific value of benzoic acid, for us in the calibration calculations, shall be traceable to a recognized certificate value.
Valves, gauges, and gaskets shall meet industry safety codes. Nickel-chromium alloy Chrome C alloy, cotton thread, or iron wire are acceptable.
ASTM D – 04 Standard Test Method for Gross Calorific Value of Coal and Coke
The bomb shall be designed so that all liquid combustion products can be completely recovered by washing the inner surfaces. Leave a Reply Cancel reply Your email address will not be published. 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.
The balance shall be checked weekly, at a minimum, for accuracy. Titiration Indicator – Methyl orange, methyl red, or methyl purple for indicating the end point when titrating the acid formed during combustion. A convenient standard solution may be prepared as follows.
Sample Holder – An open crucible or platinum, quartz, or base metal alloy.
ASTM D5865 – 13
The following precautions are recommended for safe calorimeter operation. The immersed portion of the stirrer shall be accessible to the outside through a coupler astk low thermal conductivity. Additional precautions are noted in Practice E The results of combustion calorimetric tests of fuel for steam power plants may be expressed in terms of the International Steam Table calorie I.
Balance – a laboratory balance capable of weighing the analysis sample to the nearest 0. A step-down transformer connected to an alternating current circuit, capacitors, or batteries can be used. Oxidation of coal after sampling can result in a reduction of calorific value.
One milliliter of this solution is 1. For more details, consult the manufacturer.