Biomedical Engineering Reference
In-Depth Information
Part (a): Carbon Balance
The total carbon in the gas (%) is:
0
@
1
A
3 P
percent of species with carbon in product gas
molecular weight of the species
Molecular weight of carbon
0
@
1
A 5
31
8
28 1
:
38
2
44 1
:
1
2
16 1
:
0
9
44
:
5
12
3
25
:
19%
The carbon balance gives:
Carbon in gas
carbon in tar and oil
carbon in fuel
1
5
M gas
25
:
19%
1
:
3
85%
25
55
:
59%
3
1
3
5
3
M gas
50
:
78 kg
=
s
5
Total product
54
:
95
M gas
M cond
5
5
1
M cond
4
:
17 kg
=
s
5
Part (b): Water Balance
Water enters the gasifier through the steam as well as through the moisture in
the fuel, so:
Water in steam
water in fuel
water used in gasification
1
1
5
water leaving as waste steam
=
water
The water used in gasification is:
27
25
0
:
04
50
:
78
0
:
448
5
:
25 kg
=
s
1
3
2
3
5
Therefore, the percent of steam not utilized is:
1
5
:
25
=
27
19
:
44%
2
5
TABLE 8.10
Analyses of Ultimate and Proximate of the Biomass feedstock
for Example 8.5
Proximate Analysis
in Mass (%)
Ultimate Analysis
(dry basis) in Mass (%)
Ash
4.2
Carbon
55.59
Volatile matter
70.4
Hydrogen
5.83
Fixed carbon
21.4
Nitrogen
2.09
Moisture
4.0
Sulfur
0.21
Oxygen
32.08
Ash
4.2
Search WWH ::




Custom Search