ASTM D3466-06

Standard Test Method for Ignition Temperature of Granular Activated Carbon

SIGNIFICANCE AND USE
Activated carbons used in gas-phase adsorption may be subjected to heating, either from heat applied externally to the carbon bed, or heat generated by radioactive4 contaminants, or by the adsorption process itself. If the application of heat is sudden, or if no ample means to conduct the heat from the carbon bed exists, the carbon bed may ignite. This test method provides a controlled laboratory test to determine the temperatures at which such ignition occurs. As stated in 1.2, this does not necessarily give the temperature at which ignition will occur under a specific bed operating condition. This test method does, however, allow some ranking of carbons with regard to ignition temperature, and is a useful quality-control method for unused carbons.
SCOPE
1.1 This test method covers the determination of reference ignition temperature of granular activated carbon in flowing air. This test method provides a basis for comparing the ignition characteristics of different carbons, or the change in ignition characteristics of the same carbon after a period of service.
1.2 The ignition temperature as determined by this test method cannot be interpreted as the probable ignition temperature of the same carbon under the operating conditions of a specific application unless those conditions are essentially the same as those in this test method. If it is desired to determine the ignition temperature of the carbon under a specific set of operating conditions, the test may be modified to simulate such conditions, taking into consideration the following variables: (1) air flow rate; (2) moisture content of the carbon; (3) bed depth; ( 4) relative humidity of the air stream; (5) heating rate; (6) contaminants (for example, hydrocarbons, etc.) in the air stream; and (7) contaminants that may have been adsorbed by the carbon under prior service conditions.
This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. Specific precautionary statements are given in Section .

General Information

• Status: Historical
• Publication Date: 31-Mar-2006
• ICS: 71.040.30 - Chemical reagents
• Technical Committee: D28 - Activated Carbon
• Drafting Committee: D28.04 - Gas Phase Evaluation Tests

Relations

• Replaces: ASTM D3466-76(1998) - Standard Test Method for Ignition Temperature of Granular Activated Carbon
• Effective Date: 01-Apr-2006
• Replaced By: ASTM D3466-06(2011) - Standard Test Method for Ignition Temperature of Granular Activated Carbon
• Effective Date: 01-Mar-2011
• Referred By: ASTM D4069-95(2020) - Standard Specification for Impregnated Activated Carbon Used to Remove Gaseous Radio-Iodines from Gas Streams
• Effective Date: 01-Apr-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D3466–06
Standard Test Method for
1
Ignition Temperature of Granular Activated Carbon
This standard is issued under the fixed designation D3466; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D3195 Practice for Rotameter Calibration
E11 SpecificationforWovenWireTestSieveClothandTest
1.1 This test method covers the determination of reference
Sieves
ignition temperature of granular activated carbon in flowing
E220 Test Method for Calibration of Thermocouples By
air. This test method provides a basis for comparing the
Comparison Techniques
ignition characteristics of different carbons, or the change in
E300 Practice for Sampling Industrial Chemicals
ignition characteristics of the same carbon after a period of
service.
3. Terminology
1.2 The ignition temperature as determined by this test
3.1 Definitions—Terms relating to this test method are
method cannot be interpreted as the probable ignition tempera-
defined in Terminology D2652.
ture of the same carbon under the operating conditions of a
specific application unless those conditions are essentially the
4. Summary of Test Method
2
same as those in this test method. If it is desired to determine
4.1 Asampleofcarbonisexposedtoaheatedairstream,the
the ignition temperature of the carbon under a specific set of
temperature of which is slowly increased until the carbon
operating conditions, the test may be modified to simulate such
ignites. The temperature of the carbon bed and of the air
conditions, taking into consideration the following variables:
entering the bed are recorded, and ignition is defined as the
(1) air flow rate; (2) moisture content of the carbon; (3) bed
point at which the carbon temperature suddenly rises above the
depth; (4) relative humidity of the air stream; (5) heating rate;
temperature of the air entering the bed.
(6) contaminants (for example, hydrocarbons, etc.) in the air
stream; and (7) contaminants that may have been adsorbed by
5. Significance and Use
the carbon under prior service conditions.
5.1 Activated carbons used in gas-phase adsorption may be
1.3 This standard does not purport to address all of the
subjected to heating, either from heat applied externally to the
safety concerns, if any, associated with its use. It is the
4
carbon bed, or heat generated by radioactive contaminants, or
responsibility of the user of this standard to establish appro-
by the adsorption process itself. If the application of heat is
priate safety and health practices and determine the applica-
sudden, or if no ample means to conduct the heat from the
bility of regulatory limitations prior to use. Specific precau-
carbon bed exists, the carbon bed may ignite. This test method
tionary statements are given in Section 7.
provides a controlled laboratory test to determine the tempera-
tures at which such ignition occurs. As stated in 1.2, this does
2. Referenced Documents
3 not necessarily give the temperature at which ignition will
2.1 ASTM Standards:
occur under a specific bed operating condition. This test
D2652 Terminology Relating to Activated Carbon
method does, however, allow some ranking of carbons with
D2854 Test Method for Apparent Density of Activated
regard to ignition temperature, and is a useful quality-control
Carbon
method for unused carbons.
1
This test method is under the jurisdiction of ASTM Committee D28 on 6. Apparatus
Activated Carbon, and is the direct responsibility of Subcommittee D 28.04 on Gas
6.1 Quartz Ignition Tube and Sample Holder, as shown in
Phase Evaluation Tests.
Fig. 1.
Current edition approved April 1, 2006. Published April 2006. Originally
approved in 1976. Last previous edition approved in 1998 as D3466 – 76 (1998).
6.2 Thermocouples, Chromel-Alumel with Inconel sheath,
DOI: 10.1520/D3466-06.
0.635-mm diameter, three required.
2
Y. Suzin et al., Carbon 37 (1999), pp. 335–346
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4
Milham and Kovoch, “Treatment of Airborne Radioactive Wastes,” Interna-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tional Atomic Energy Agency, Vienna, 1968. (Paper SM-110/49).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3466–06
FIG. 1 Ignition Tube and Sample Assembly
6.3 Supply of Clean, Dry, Oil-Free Air—The air must be 6.11 Programmable Temperature Controller (Optional).
passed through a
...