1、ASTM D328b 9b W 0759530 O586408 821 Designation:D 3286-96 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1 O0 Barr Harbor Dr,West Conshohocken.PA 19428 Repnnted from the Annual Bod of ASTM Standards Copyright ASTM If not listed in the current combined index.wil appear ih the next edition Standard Test M
2、ethod for Gross Calorific Value of Coal and Coke by the Isoperibol Bomb Calorimeter T h i s standard is kued under the fued designation D 3286;the number immediately foilowing the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in par
3、entheses indicates the year of last reapproval.A supcrmipt epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope 1.1 This test method covers the determination of the gross calorific value of coal and coke by the isoperibol bomb calorimeter.1.2 The values stated in SI
4、units are to be regarded as the standard unless otherwise designated.The values given in parentheses are for information only.1.3 This standard does not purport to address all o f the safety concerns,if any,associated with its use.It is the responsibility o f the user o f this standard to establish
5、appro-priate safety and healh practices and determine the applica-bility o f regulatory limitations prior to use.For specific hazard statements,see Section 8.2.Referenced Documents 2.1 ASTM Slandards:D 121 Terminology of Coal and Cokez D346 Practice for Collection and Preparation of Coke Samples for
6、 Laboratory Analysis D 1 193 Specification for Reagent Water3 D 20 1 3 Method of Preparing Coal Samples for Analysisz D 3 173 Test Method for Moisture in the Analysis Sample of Coal and Coke D3177 Test Methods for Total Sulfur in the Analysis Sample of Coal and Cokez D 3 I80 Practice for Calculating
7、 Coal and Coke Analyses from As-Determined to Different Bases2 D 4239 Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High Temperature Tube Furnace Combustion Methods2 E 1 Specification for ASTM Thermometers4 E 144 Practice for Safe Use of Oxygen Combustion Bombs5 3.Terminology
8、3.1 Definitions:3.1.1 caloriJic value,n-the heat produced by combustion of a unit quantity of a test specimen under specific condi-tions.3.1.1.1 Discussion-It is expressed in this test method in This test method is under the jurisdiction of ASTM Committee D-5 on Coal and Coke and is the direct respo
9、nsibility of Subcommittee DO5.21 on Methods of Analysis.Current edition approved July 10,1996.hbiished September 1996.Originally published as D 3286-73.Last previous edition D 3286-91a.2 Annual Book o f ASTM Standards,Vol 05.05.f Annual Book o f ASTM Standards,Vol 1 I.01.Annual Book o f ASTM Standar
10、ds,Vol 14.03.5 Annual Book o f ASTM Standards,Vol 14.02.calories per gram(cal/g)and can also be expressed in British thermal units per pound(Btuflb)or in the International System of Units(SI),in joules per gram(J/g),when required.The unit equivalents are given in Table 1.3.1.2 gross calorific value(
11、goss heat o f combustion at constant volume),Q,(gross),n-see Terminology D I2 1.3.1.3 net calorific value(net heat o f combustion at con-stant pressure),Qp(net),n-see Terminology D 12 1.3.1.4 calorimeter,n-as used in this test method,consists of the bomb and its contents,the calorimeter vessel(bucke
12、t)with stirrer,the water in which the bomb is immersed,and the portions of the thermometer and the ignition leads within the calorimeter vessel.3.2 Descriptions o f Terms Specjc to this Standard:3.2.I corrected temperature rise,n-the temperature change of the calorimeter caused by the process that o
13、ccurs inside the bomb;that is,the observed temperature change corrected for various effects as noted in 10.4.1.3.2.1.1 Discussion-Temperature is measured in degrees Celsius.Thermometer corrections shall be applied.Temper-atures may be recorded in ohms or other arbitrary units as the equivalent of de
14、grees.Consistent units shall be used in standardization and the actual calorific value determination.If arbitrary units other than degrees Celsius are used,the temperature interval over which all tests are made shall not vary so much that an error greater than 0.001C would result.3.2.2 energy equiva
15、lent,heat capacity,or water equivalent,n-the energy required to raise the temperature of the calorimeter an arbitrary unit.This is the number that,when multiplied by the corrected temperature rise,then adjusted for extraneous heat effects,and divided by the weight of the sample,equates the gross cal
16、orific value.NOTE 1-Conversion to other units is discussed in Appendix X2.Time is expressed in minutes.M a s s is expressed grams.4.Summary of Test Method 4.1 Calorific value is determined in this test method by burning a weighed sample,in oxygen,in a calibrated isopenbol bomb calorimeter under controlled conditions.The calorimeter is standardized by burning benzoic acid.The calorific value of the sample is computed from temper-ature observations made before,during,and after combus-tion,and maki