A coal has 10% moisture, 39% volatile matter and 41% ash. Calculate % volatile matter and % fixed carbon on (dry, mineral-matter free) dmmf basis and determine the ASTM Group to which the coal belongs. Table 2: Characterization of different types of coal TYPE OF COAL SUB-TYPE FIXED CARBON VOLATILE CALORIFIC (%wt) MATTER (%wt) < 2% VALUE (MJ/kg) Anthracite Meta-anthracite over 98% Anthracite Semi-anthracite 86-92% 92-98% 2-6% 8-14% Bituminous Low-volatile 78-86% 14-22% Medium volatile 69-78% 22-31% High volatile A > 32.5 High volatile B High volatile C < 69% > 31% 30.2-32.5 26.7-30.2 Sub-bituminous A 24.4-26.7 < 69% > 31% 22.1-24.4 19.3-22.1 Lignite 14.6-19.3 < 69% > 31% <14.6
A coal has 10% moisture, 39% volatile matter and 41% ash. Calculate % volatile matter and % fixed carbon on (dry, mineral-matter free) dmmf basis and determine the ASTM Group to which the coal belongs. Table 2: Characterization of different types of coal TYPE OF COAL SUB-TYPE FIXED CARBON VOLATILE CALORIFIC (%wt) MATTER (%wt) < 2% VALUE (MJ/kg) Anthracite Meta-anthracite over 98% Anthracite Semi-anthracite 86-92% 92-98% 2-6% 8-14% Bituminous Low-volatile 78-86% 14-22% Medium volatile 69-78% 22-31% High volatile A > 32.5 High volatile B High volatile C < 69% > 31% 30.2-32.5 26.7-30.2 Sub-bituminous A 24.4-26.7 < 69% > 31% 22.1-24.4 19.3-22.1 Lignite 14.6-19.3 < 69% > 31% <14.6
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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![A coal has 10% moisture, 39% volatile matter and 41% ash. Calculate % volatile matter and
% fixed carbon on (dry, mineral-matter free) dmmf basis and determine the ASTM Group to
which the coal belongs.
I
Table 2: Characterization of different types of coal
TYPE OF COAL
SUB-TYPE
FIXED CARBON
VOLATILE
CALORIFIC
(%wt)
MATTER (%wt)
< 2%
VALUE (MJ/kg)
Anthracite
Meta-anthracite
over 98%
Anthracite
92-98%
2-6%
Semi-anthracite
86-92%
8-14%
Bituminous
Low-volatile
78-86%
14-22%
Medium volatile 69-78%
High volatile A
High volatile B
High volatile C
22-31%
> 32.5
< 69%
> 31%
30.2-32.5
26.7-30.2
Sub-bituminous
A
24.4-26.7
B.
< 69%
> 31%
22.1-24.4
19.3-22.1
Lignite
14.6-19.3
< 69%
> 31%
B.
<14.6](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F73ee4c84-7cbc-46e9-8cbb-b491cd381549%2F56102c97-00fe-478a-b258-baabf9985616%2Fzq8rd2_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A coal has 10% moisture, 39% volatile matter and 41% ash. Calculate % volatile matter and
% fixed carbon on (dry, mineral-matter free) dmmf basis and determine the ASTM Group to
which the coal belongs.
I
Table 2: Characterization of different types of coal
TYPE OF COAL
SUB-TYPE
FIXED CARBON
VOLATILE
CALORIFIC
(%wt)
MATTER (%wt)
< 2%
VALUE (MJ/kg)
Anthracite
Meta-anthracite
over 98%
Anthracite
92-98%
2-6%
Semi-anthracite
86-92%
8-14%
Bituminous
Low-volatile
78-86%
14-22%
Medium volatile 69-78%
High volatile A
High volatile B
High volatile C
22-31%
> 32.5
< 69%
> 31%
30.2-32.5
26.7-30.2
Sub-bituminous
A
24.4-26.7
B.
< 69%
> 31%
22.1-24.4
19.3-22.1
Lignite
14.6-19.3
< 69%
> 31%
B.
<14.6
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