Find the most up-to-date version of ASTM E at Engineering ASTM E() [ Withdrawn ]. Standard Test Method for Gross Calorific Value of Refuse-Derived Fuel by the Bomb Calorimeter. Designation: E – 87 (Reapproved ) Standard Test Method for. Gross Calorific Value of Refuse-Derived Fuel by the Bomb Calorimeter1 This standard.
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If the bomb is lined with platinum or gold, all openings shall be sealed to prevent combustion products from reaching the base metal. Wastes processed to coarse particle size with or without ferrous metal separation. There shall be no gas leakage during a test. Examine the bomb interior and discard the test if unburned sample or sooty deposits are found.
Weight of sample – Thoroughly mix the analysis sample of solid fuel in the sample bottle, taking care that the heavies and lights fluff are distributed in the sample. Take calorimeter readings at 1-min intervals until the same temperature is observed in three successive readings.
This represents a change of 0. Purity of Reagents – Reagent grade chemicals shall be used in r711 tests. Determine the correction for HNO3, and firing wire.
ASTM E711-87 (Re-approved 2004) – International Standards
Sodium Carbonate, Standard Solution 0. Examine the bomb interior and discard the test if unburned sample or sooty deposits are found. Carefully weigh approximately 1g of the sample directly into the crucible in which it is to be burned or into a tared weighing scoop which the sample is transferred to the crucible. Knowledge of this value is essential in assessing the commercial worth of the fuel and to provide the basis of contract between producer and user.
Weights are measured in grams. Before adding this water, rinse the bomb, and drain the excess water, and leave undried.
Precision and Bias 6 The pressure gauge shall be checked periodically for accuracy. Detach the filling connection and exhaust the bomb xstm the usual manner. Carefully wash the interior of the bomb, including the capsule with distilled or de-ionized water containing the titration indicator until the washings are free of acid.
It is equivalent to the heat produced by comb co mbus usti tion on of a un unit it qu quan anti tity ty of so soli lid d fu fuel el at a co cons nsta tant nt pressu pre ssure re of one atm w711 ospher here, e, und under er the ass assump umptio tion n tha thatt all water in the products remains in the form of vapor. Commercially prepared pellets may asym used provided they are made from National Bureau of Standards benzoic acid.
Fire the charge at the start of the sixth minute and record the time and temperature. After the rapid-rise period about 4 to 5 minrecord temperatures at 1 min intervals aatm the minute until the difference between successive readings has been constant asmt 5 min. The maximum difference in correction between any two test points shall not be more than 0. It is equivalent to aztm heat produced by combustion of a unit quantity of solid fuel at a constant pressure of one atmosphere, under the assumption that all water in the products remains in the form of vapor.
During ignition of a sample, the operator shall not permit any portion of his body to extend over the calorimeter. Terminology refuse-derived fuels—soli 3. 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 e7111 use. Carefully weigh approximately 1 g of the sample directly into the crucible in which it is to be burned or into a tared weighing scoop from which the sample is transferred to the crucible.
Suitable reducing e711 and adaptors for 2 to 3. The buret used for the HNO3 titration shall be of such accuracy that estimations to 0. The laboratory sample must be air-dried and particle size reduced to pass a 0. If the bomb is lined with platinum or gold, all openings shall be sealed to prevent combustion products from reaching the base metal.
ASTM E – 87 Gross Calorific Calorimeter – PDF Free Download
Controlled room temperature and humidity are desirable. Your email address will not be published. The jacket may be arranged so as to remain at constant temperature or with provisions for rapidly adjusting the jacket temperature to equal that of the calorimeter for adiabatic operation.
Valves, gauges, and gaskets must meet industry safety codes. Oxygen Bomb – constructed of material that are not affected by the combustion process or products sufficiently to introduce measurable heat input or alteration of end products. A step-down transformer connected to an alternating current lighting circuit or batteries may be used. Combustible waste fraction densified compressed into the form of pellets, sligs, cubettes, or briquettes.
The bomb shall be designed so that all liquid combustion products can be completely recovered by washing the inner surfaces. The apparatus should be shielded from direct sunlight and radiation from other sources. This is the number that is multiplied by the corrected temperature rise in degrees and astk by the sample weight in grams to give the gross calorific value after thermochemical corrections have been applied.
Calorific Value – the heat of combustion e71 a unit quantity of a substance.
A Wheatstone bridge and galvanometer capable of measuring resistance to 0. A stepdown transformer connected to an alternating current lighting circuit or batteries may be used. The pressure gage shall be checked periodically for accuracy.
Firing Wire – Connect a measured length of firing wire to the ignition terminals with enough slack to allow the firing wire to maintain contact with the sample. Continuous stirring for 10 min shall not raise the calorimeter temperature more than 0.