This paper proposes a novel multifunctional energy system (MES), which cogenerates coke, hydrogen, and power, through the use of coal and coke oven gas (COG). In this system, a new type of coke oven, firing coal instead of COG as heating resource for coking, is adopted. The COG rich in H2 is sent to a pressure swing adsorption (PSA) unit to separate about 80% of hydrogen first, and then the PSA purge gas is fed to a combined cycle as fuel. The new system combines the chemical processes and power generation system, along with the integration of chemical conversion and thermal energy utilization. In this manner, both the chemical energy of fuel and thermal energy can be used more effectively. With the same inputs of fuel and the same output of coking heat, the new system can product about 65% more hydrogen than that of individual systems. As a result, the thermal efficiency of the new system is about 70%, and the exergy efficiency is about 66%. Compared with individual systems, the primary energy saving ratio can reach as high as 12.5%. Based on the graphical exergy analyses, we disclose that the integration of synthetic utilization of COG and coal plays a significant role in decreasing the exergy destruction of the MES system. The promising results obtained may lead to a clean coal technology that will utilize COG and coal more efficiently and economically.

1.
Xie
,
K.
, 2005,
Focus on Coal Chemical Engineering
,
Chemical Industry
,
Beijing
.
2.
BP Group
, 2005, “
BP Statistical Review of World Energy
.”
3.
Nexant, Inc.
, 2006, “
Multi-Client Study Prospectus: Polygeneration From Coal Integrated Power, Chemicals and Liquid Fuels
,” Nexant Report.
4.
U.S. DOE
, 2003, “
Early Entrance Co-Production Plant
,” U.S. DOE Technical Report No. DE-FC26-00NT40693.
5.
Onozaki
,
M.
,
Watanabe
,
K.
,
Hashimoto
,
T.
,
Saegusa
,
H.
, and
Katayama
,
Y.
, 2006, “
Hydrogen Production by the Partial Oxidation and Steam Reforming of Tar From Hot Coke Oven Gas
,”
Fuel
,
85
, pp.
143
149
. 0016-2361
6.
Jin
,
H.
,
Han
,
W.
, and
Gao
,
L.
, 2007, “
Multi-Functional Energy System (MES) With Multi Fossil Fuels and Multi Products
,”
ASME J. Eng. Gas Turbines Power
0742-4795,
129
(
2
), pp.
331
337
.
7.
Gray
D.
, and
Tomlinson
G.
, 2002, “
Hydrogen From Coal
,” Mitretek Technical Paper No. MTR 2002-31.
8.
Sun
,
S.
,
Gao
,
L.
,
Jin
,
H.
, and
Lin
,
R.
, 2007, “
System Study on Polygeneration System for Methanol and Power Production Based on Coke Oven Gas and Coal Gas
,”
Proceedings of the ECOS2007
, Padova, Italy, Jun., pp.
1009
1016
.
9.
Lozza
,
G.
, and
Chiesa
,
P.
, 2002, “
Natural Gas Decarbonization to Reduce CO2 Emission From Combined Cycles—Part II: Steam-Methane Reforming
,”
ASME J. Eng. Gas Turbines Power
0742-4795,
124
, pp.
89
95
.
10.
Hemmes
,
K.
,
Zachariah-Wolff
,
J. L.
,
Geidl
,
M.
, and
Andersson
,
G.
, 2007, “
Towards Multi-Source Multi-Product Energy Systems
,”
Int. J. Hydrogen Energy
,
32
, pp.
1332
1338
. 0360-3199
11.
Cai
,
R.
,
Lin
,
R.
,
Xiao
,
Y.
, and
Xu
,
D.
, 1993, “
Coal-Fired Combined Cycle Power Generation Technology With High Efficiency, Low Pollution, and Low Water Consumption
,”
UNESCO, Senior Conference of Cleaning Coal-Fired Technology in China
, Beijing, China.
12.
Ni
,
W.
,
Li
,
Z.
, and
Xue
,
Y.
, 2000, “
Polygeneration Energy Systems Based on Coal Gasification, Energy and Environment
,”
Eng. Sci.
,
2
(
8
), pp.
59
68
. 0013-7812
13.
Gao
,
L.
,
Jin
,
H.
, and
Liu
,
Z.
, 2004, “
Exergy Analysis of Coal-Based Polygeneration System for Power and Chemical Production
,”
Energy
0360-5442,
29
, pp.
2359
2371
.
14.
Jin
,
H.
,
Sun
,
S.
, and
Gao
,
L.
, 2006, “
The Technology of a Novel Coal-fired Coke Oven
,” China Patent No. 200610089586.9.
15.
Yan
,
X.
, 1997, “Test and Measurement of the Model JN60-82 Coke Oven,” Gas & Heat, 17(4), pp. 10–16.
16.
Ishida
,
M.
, and
Kawamura
,
K.
, 1982, “
Energy and Exergy Analysis of a Chemical Process System With Distributed Parameters Based on the Energy-Direction Factor Diagram
,”
Ind. Eng. Chem. Process Des. Dev.
0196-4305,
21
, pp.
690
702
.
17.
Jin
,
H.
, and
Ishida
,
M.
, 1993, “
Graphical Exergy Analysis of Complex Cycles
,”
Energy
0360-5442,
18
(
6
), pp.
615
625
.
18.
Chiesa
,
P.
,
Lozza
,
G.
, and
Mazzocchi
,
L.
, 2005, “
Using Hydrogen as Gas Turbine Fuel
,”
ASME J. Eng. Gas Turbines Power
0742-4795,
127
, pp.
73
80
.
19.
Metz
,
B.
,
Davidson
,
O.
,
Coninck
,
H.
,
Loos
,
L.
, and
Meyer
,
M.
, 2005, “
IPCC Special Report on Carbon Dioxide Capture and Storage
.”
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