ASTM D1756-02

Standard Test Method for Determination as Carbon Dioxide of Carbonate Carbon in Coal

SCOPE
1.1 This test method covers the determination of carbon dioxide in coal in any form, such as mineral carbonate, from which carbon dioxide is released by action of mineral acids. It applies to high-carbonate and low-carbonate coals.  
1.2 The values stated in SI units are to be regarded as the standard.  
1.3  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.

General Information

• Status: Historical
• Publication Date: 09-Oct-2002
• ICS: 73.040 - Coals
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.21 - Methods of Analysis

Relations

• Replaces: ASTM D1756-96(2000) - Standard Test Method for Determination as Carbon Dioxide of Carbonate Carbon in Coal
• Effective Date: 10-Oct-2002
• Referred By: ASTM D6316-17 - Standard Test Method for Determination of Total, Combustible and Carbonate Carbon in Solid Residues from Coal and Coke
• Effective Date: 10-Oct-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D1756–02
Standard Test Method for
Determination as Carbon Dioxide of Carbonate Carbon in
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Coal
This standard is issued under the fixed designation D 1756; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope method.The value found for carbon dioxide is used to estimate
the mineral matter content, particularly CaCO and MgCO ,of
1.1 This test method covers the determination of carbon 3 3
high-carbonate coals.
dioxide in coal in any form, such as mineral carbonate, from
which carbon dioxide is released by action of mineral acids. It
5. Apparatus (see Fig. 1)
applies to high-carbonate and low-carbonate coals.
5.1 The use of apparatus modified from that shown in Fig.
1.2 The values stated in SI units are to be regarded as the
1 shall be considered permissible so long as results agree
standard.
4
within the accepted precision.
1.3 This standard does not purport to address all of the
5.2 Air-Purifying Train, consisting of the following units
safety concerns, if any, associated with its use. It is the
arranged in the order of passage of air:Any convenient form of
responsibility of the user of this standard to establish appro-
flowmeter(1)connectedtoacarbondioxideabsorber(2)filled
priate safety and health practices and determine the applica-
with an acceptable absorbent. The absorber (2) shall be
bility of regulatory limitations prior to use.
connected to a trap (3).
2. Referenced Documents 5.3 ReactionUnit, consisting of a 300-mLwide-mouth flask
(5) fitted with a three-hole rubber stopper. One hole is to
2.1 ASTM Standards:
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accommodate a 60-mLopen-end separatory funnel (4) extend-
D 1193 Specification for Reagent Water
3
ingalmosttothebottomoftheflask(5).Thesecondholeinthe
D 2013 Method of Preparing Coal Samples for Analysis
stopper is used to connect the purifying train through the trap
D 3180 Practice for Calculating Coal and Coke Analyses
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(3);thetipoftheglasstubingshallextendalmosttothebottom
from as Determined to Different Bases
of flask (5). The third hole of the stopper shall be fitted to a
3. Summary of Test Method
water-cooled condenser (6).
5.4 AbsorptionUnit,consistingofawaterabsorber(7)filled
3.1 The determination of carbon dioxide is made by decom-
with an acceptable desiccant connected to the condenser (6)on
posing with acid a weighed quantity of the sample in a closed
the one side and on the other side to absorber (8) containing
system and absorbing the carbon dioxide in an absorbent. The
anhydrous copper sulfate on pumice or granular silver sulfate.
increase in weight of the absorbent is a measure of the carbon
The carbon dioxide absorber (9) shall be connected to absorber
dioxide in the sample used.
(8) and to another water absorber (10). The absorber (10) shall
4. Significance and Use
be connected to a T-piece stopcock (11) which in turn shall be
attached to a filter-flask (12). The system shall be aspirated by
4.1 Small amounts of mineral carbonates occur in many
a water pump (13).
coals and comparatively large amounts in some coals. The
determination of these carbonates is the purpose of this test
1 4
This test method is under the jurisdiction of ASTM Committee D05 on Coal For further information regarding this determination, see Krumin, P. O., “The
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of Meigs Creek No. 9 Coal Bed in Ohio, Part III—Further Study of the Chemical and
Analysis. Physical Properties, and Washability Characteristics, with a Brief Review of New
Current edition approved Oct. 10, 2002. Published December 2002. Originally Methods Employed,” Bulletin No. 165, Ohio State University, Engineering Experi-
published as D 1756–60T. Last previous edition D 1756–96 (2000). ment Station, (1957), pp. 38–46; and Krumin, P. O., and Svanks, K., “Four Methods
2
Annual Book of ASTM Standards, Vol 11.01. of Determination of Carbon Dioxide in Solid Fuels,” ASTM Bulletin, No. 227,
3
Annual Book of ASTM Standards, Vol 05.06. January 1958, pp. 51–57.
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D1756–02
FIG. 1 Apparatus for the Determination of Carbon Dioxide
6. Purity of Reagents 7.7 Wetting Agent (10 %)—Any wetting agent suitable for
8
use in acid solution.
6.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
8. Preparation of Apparatus
all reagents shall conform to the specifications of the Commit-
8.1 The various components shall be assembled as shown i
...