Methanol (CH3OH) and ethanol (C2H5OH) are generally called alcohol. They can be mixed with gasoline to fuel SI engine. The fuel blends of alcohol and gasoline are named gasohol. Alcohol emission characteristics and the contributions of fuel on hydrocarbon (HC) emission were experimentally investigated on a three-cylinder, electronic controlled, spark ignition JL368Q3 engine when it ran on 10 (v/v) %, 20 (v/v) %, and 85 (v/v) % methanol/gasoline and ethanol/gasoline fuel blends. Experimental results show that, the value of alcohol emission rates (g alcohol emission per kg alcohol fuel, g/kg.) is a decreasing exponential function of exhaust temperature with high correlation; regardless of the alcohol fraction in fuel blends, the CH3OH emission rate is no more than 8%, while that of C2H5OH no more than 35%. The emission rate of nonalcohol HC was one grade higher than the alcohol emission rate; the minimum HC emission rate occurs at middle and high engine loads, it is around 40% for methanol/gasoline blends and about 50% for ethanol/gasoline blends. Gasoline is the main source of HC emission of gasohol engine, methanol contributes no more than 8% while ethanol no more than 25% on HC emission.

References

References
1.
Chokri
,
B.
,
Ridha
,
E.
,
Rachid
,
S.
, and
Jamel
B.
,
2012
, “
Experimental Study of a Diesel Engine Performance Running on Waste Vegetable Oil Biodiesel Blend
,”
ASME J. Energy Resour. Technol.
,
134
(
3
), p.
032202
.10.1115/1.4006655
2.
Bousbaa
,
H.
,
Sary
,
A.
,
Tazerout
,
M.
, and
Liazid
,
A.
,
2012
, “
Investigations on a Compression Ignition Engine Using Animal Fats and Vegetable Oil as Fuels
,”
ASME J. Energy Resour. Technol.
,
134
(
2
), p.
022202
.10.1115/1.4005660
3.
Yoon
,
S. H.
,
Park
,
S. H.
,
Suh
,
H. K.
,
Lee
, and
C. S.
,
2011
, “
Effect of Biodiesel-Ethanol Blended Fuel Spray Characteristics on the Reduction of Exhaust Emissions in a Common-Rail Diesel Engine
,”
ASME J. Energy Resour. Technol.
,
132
(
4
), p.
042201
.10.1115/1.4003177
4.
Khaliq
,
A.
, and
Trivedi
,
S. K.
,
2012
, “
Second Law Assessment of a Wet Ethanol Fuelled HCCI Engine Combined With Organic Rankine Cycle
,”
ASME J. Energy Resour. Technol.
,
134
(
2
), p.
022201
.10.1115/1.4005698
5.
Yilmaz
,
N.
, and
Donaldson
,
A. B.
,
2007
, “
Modeling of Chemical Processes in a Diesel Engine With Alcohol Fuels
,”
ASME J. Energy Resour. Technol.
,
129
(
4
), pp.
355
359
.10.1115/1.2794771
6.
Martinez-Frias
,
J.
,
Aceves
,
S. M.
, and
Flowers
,
D. L.
,
2007
, “
Improving Ethanol Life Cycle Energy Efficiency by Direct Utilization of Wet Ethanol in HCCI Engines
,”
ASME J. Energy Resour. Technol.
,
129
(
4
), pp.
332
337
.10.1115/1.2794768
7.
Liao
,
S. Y.
,
Jiang
,
D. M.
,
Cheng
,
Q.
,
Huang
,
Z. H.
, and
Zeng
,
K.
,
2006
, “
Effect of Methanol Addition into Gasoline on the Combustion Characteristics at Relatively Low Temperatures
,”
Energy Fuels
,
20
, pp.
84
90
.10.1021/ef0502352
8.
Mustafa
,
K.
,
Yakup
,
S.
,
Tolga
,
T.
, and
Yücesu
,
H. S.
,
2009
, “
The Effects of Ethanol–Unleaded Gasoline Blends on Engine Performance and Exhaust Emissions in a Spark–Ignition Engine
,”
Renewable Energy
,
34
, pp.
2101
2106
.10.1016/j.renene.2009.01.018
9.
Liu
,
S. H.
,
Li
,
H.
,
Lv
,
S. C.
,
Cuty Clemente
,
E. R.
, and
Qi
,
D. H.
,
2006
, “
Effects of Methanol/Gasoline Blend on Gasoline Engine Performance and Emissions
,”
J Xi'an Jiaotong Univ.
,
40
, pp.
1
4
.10.1109/OFC.2006.216061
10.
Balki
,
M. F.
,
Sayin
,
C.
, and
Canakcic
,
M.
,
2014
, “
The Effect of Different Alcohol Fuels on the Performance, Emission and Combustion Characteristics of a Gasoline Engine
,” Fuel, 115, pp. 901–906.
11.
Gravalosa
,
I.
,
Moshoub
,
D.
,
Gialamasa
,
Th.
,
Xyradakisb
,
P.
,
Katerisb
,
D.
, and
Tsiropoulosa
,
Z.
,
2013
, “
Emissions Characteristics of Spark Ignition Engine Operating on Lower–Higher Molecular Mass Alcohol Blended Gasoline Fuels
,”
Renewable Energy
,
50
, pp.
27
32
.10.1016/j.renene.2012.06.033
12.
Abu–Zaid
,
M.
,
Badran
,
O.
, and
Yamin
,
J.
,
2004
, “
Effect of Methanol Addition on the Performance of Spark Ignition Engines
,”
Energy Fuels
,
18
, pp.
312
315
.10.1021/ef030103d
13.
Bilgin
,
A.
, and
Sezer
,
I.
,
2008
, “
Effects of Methanol Addition to Gasoline on the Performance and Fuel Cost of a Spark Ignition Engine
,”
Energy Fuels
,
22
, pp.
2782
2788
.10.1021/ef8001026
14.
Hsieh
,
W. D.
,
Chen
,
R. H.
,
Wu
,
T. L.
, and
Lin
,
T. H.
,
2002
, “
Engine Performance and Pollutant Emission of an SI Engine Using Ethanol–Gasoline Blended Fuels
,”
Atmos. Environ.
,
36
, pp.
403
410
.10.1016/S1352-2310(01)00508-8
15.
Zervas
,
E.
,
Montagne
,
X.
, and
Lahaye
,
J.
,
2002
, “
Emission of Alcohols and Carbonyl Compounds From a Spark Ignition Engine, Influence of Fuel and Air/Fuel Equivalence Ratio
,”
Environ. Sci. Tech.
,
36
, pp.
2414
2421
.10.1021/es010265t
16.
Li
,
J.
,
Gong
,
C. M.
,
Wang
,
E. Y.
,
Yu
,
X. M.
,
Wang
,
Z.
, and
Liu
,
X. J.
,
2010
, “
Emissions of Formaldehyde and Unburned Methanol From a Spark-Ignition Methanol Engine During Cold Start
,”
Energy Fuels
,
24
(
2
), pp.
863
870
.10.1021/ef9009982
17.
Zhang
,
F.
,
Zhang
,
X.
,
Shuai
,
S. J.
,
Xiao
,
J. H.
, and
Wang
,
J. X.
,
2010
, “
Unregulated Emissions and Combustion Characteristics of Low-Content Methanol−Gasoline Blended Fuels
,”
Energy Fuels
,
24
(
2
), pp.
1283
1292
.10.1021/ef900974p
18.
Wei
,
Y. J.
,
Liu
,
S. H.
,
Liu
,
F. J.
,
Liu
,
J.
,
Zhu
,
Z.
, and
Li
,
G. L.
,
2009
, “
Formaldehyde and Methanol Emissions From Methanol–Gasoline Fueled SI Engine
,”
Energy Fuels
,
23
, pp.
3313
3318
.10.1021/ef900175h
19.
Wei
,
Y. J.
,
Liu
,
S. H.
,
Liu
,
F. J.
,
Liu
,
J.
,
Zhu
,
Z.
, and
Li
,
G. L.
,
2010
, “
Direct Measurement of Formaldehyde and Methanol Emissions From Gasohol Engine via Pulsed Discharge Helium Ionization Detector
,”
Fuel
,
89
, pp.
2179
2184
.10.1016/j.fuel.2010.04.015
20.
Petrova
,
V. M.
, and
Williams
,
F. A.
,
2006
, “
A Small Detailed Chemical Kinetic Mechanism for Hydrocarbon Combustion
,”
Combust. Flame
,
144
, pp.
526
544
.10.1016/j.combustflame.2005.07.016
21.
Alzueta
,
M. U.
,
Bilbao
,
R.
, and
Finestra
,
M.
,
2002
, “
Methanol Oxidation and Its Interaction With Nitric Oxide
,”
Energy Fuels
,
15
, pp.
724
729
.10.1021/ef0002602
22.
Held
,
T. J.
, and
Dryer
,
F. L.
,
1998
, “
A Comprehensive Mechanism for Methanol Oxidation
,”
Int. J. Chem. Kinet.
,
30
, pp.
805
830
.10.1002/(SICI)1097-4601(1998)30:11<805::AID-KIN4>3.0.CO;2-Z
23.
Zervas
,
E.
,
Montagne
,
X.
, and
Lahaye
,
J.
,
1999
, “
Influence of the Gasoline Formulation on Specific Pollutants
,”
J. Air Waste Manage. Assoc.
,
49
, pp.
1304
1314
.10.1080/10473289.1999.10463969
24.
Liu
,
F. J.
,
Liu
,
P.
,
Zhu
,
Z.
,
Wei
,
Y. J.
, and
Liu
,
S. H.
,
2012
, “
Regulated and Unregulated Emissions From a Spark Ignition Engine Fueled With Low-Blend Ethanol-Gasoline Mixture
,”
Proc. Inst. Mech. Eng., Part D (J. Automob. Eng.)
,
226
, pp.
517
528
.10.1177/0954407011421741
25.
Wei
,
Y. J.
,
Liu
,
S. H.
,
Liu
,
F. J.
,
Liu
,
J.
,
Zhu
,
Z.
, and
Li
,
G. L.
,
2009
, “
Aldehydes and Methanol Emission Mechanisms and Characteristics From a Methanol/Gasoline-Fueled Spark-Ignition (SI) Engine
,”
Energy Fuels
,
23
, pp.
6222
6230
.10.1021/ef900721v
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