Combustion of ethanol+air mixture supported by transverse arc plasma
The influence of preliminary plasma reforming of fuel on plasma combustion efficiency was investigated. The ethanol was chosen as researched fuel. The electrical discharge in the gas channel with a liquid wall was used for preliminary ethanol reforming. The burning was supported by transverse arc di...
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| Veröffentlicht in: | Вопросы атомной науки и техники |
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| Datum: | 2007 |
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2007
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| Zitieren: | Combustion of ethanol+air mixture supported by transverse arc plasma / V.V. Yukhymenko, V.Ya. Chernyak, V.V. Naumov, Iu.P. Veremii, V.A. Zrazhevskij // Вопросы атомной науки и техники. — 2007. — № 1. — С. 142-144. — Бібліогр.: 2 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859610969104187392 |
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| author | Yukhymenko, V.V. Chernyak, V.Ya. Naumov, V.V. Veremii, Iu.P. Zrazhevskij, V.A. |
| author_facet | Yukhymenko, V.V. Chernyak, V.Ya. Naumov, V.V. Veremii, Iu.P. Zrazhevskij, V.A. |
| citation_txt | Combustion of ethanol+air mixture supported by transverse arc plasma / V.V. Yukhymenko, V.Ya. Chernyak, V.V. Naumov, Iu.P. Veremii, V.A. Zrazhevskij // Вопросы атомной науки и техники. — 2007. — № 1. — С. 142-144. — Бібліогр.: 2 назв. — англ. |
| collection | DSpace DC |
| container_title | Вопросы атомной науки и техники |
| description | The influence of preliminary plasma reforming of fuel on plasma combustion efficiency was investigated. The ethanol was chosen as researched fuel. The electrical discharge in the gas channel with a liquid wall was used for preliminary ethanol reforming. The burning was supported by transverse arc discharge in a flow of mix air + reformed ethanol. Emission spectroscopy of plasma was applied to control of burning process. Offered a plasma method for testing of burning efficiency of fuel.
Досліджувався вплив попереднього плазмового реформування палива на ефективність горіння. В якості досліджуваного палива використовувався спирт. Для попереднього реформування спирту використовувався електричний розряд в газовому каналі з рідкою стінкою. Горіння підтримувалось за допомогою поперечного дугового розряду в потоці суміші повітря + реформований спирт. Для контролю процесів горіння використовувалась емісійна спектроскопія плазми. Запропоновано плазмовий метод для тестування ефективності горіння палива.
Исследовалось влияние предварительного плазменного реформирования топлива на эффективность горения. В качестве исследуемого топлива использовался спирт. Для предварительного реформирования спирта использовался электрический разряд в газовом канале с жидкой стенкой. Горение поддерживалось с помощью поперечного дугового разряда в потоке смеси воздух + реформированный спирт. Для контроля процессов горения использовалась эмиссионная спектроскопия плазмы. Предложен плазменный метод для тестирования эффективности горения топлива.
This work was partially supported by the Ukrainian
Ministry of Education and Science, grant ʋ M/176-2006
and by the Taras Shevchenko Kyiv National University,
grant ʋ 06 BP 052-03
|
| first_indexed | 2025-11-28T12:01:37Z |
| format | Article |
| fulltext |
142 Problems of Atomic Science and Technology. 2007, 1. Series: Plasma Physics (13), p. 142-144
COMBUSTION OF ETHANOL+AIR MIXTURE SUPPORTED
BY TRANSVERSE ARC PLASMA
V.V. Yukhymenko1, V.Ya. Chernyak1, V.V. Naumov2, Iu.P. Veremii1, V.A. Zrazhevskij1
1Faculty of Radiophysics, Dep. of Physical Electronics, Taras Shevchenko Kyiv National
University, Pr. Acad. Glushkova 2/5, 03127 Kyiv, Ukraine, e-mail: yvitaliy@ukr.net;
2Institute of Fundamental Problems for High Technology, Ukrainian Academy of Sciences,
Pr. Nauki 45, 03028 Kiev, Ukraine, e-mail: naumov@ifpht.kiev.ua
The influence of preliminary plasma reforming of fuel on plasma combustion efficiency was investigated. The
ethanol was chosen as researched fuel. The electrical discharge in the gas channel with a liquid wall was used for
preliminary ethanol reforming. The burning was supported by transverse arc discharge in a flow of mix air + reformed
ethanol. Emission spectroscopy of plasma was applied to control of burning process. Offered a plasma method for
testing of burning efficiency of fuel.
PACS: 52.77.-j, 52.80.-s, 52.50.Dg
1. INTRODUCTION
Today the generation of non-equilibrium plasma is
very actual for power engineering. The large attention is
devoted to hydrogen power engineering with the purpose
of use hydrogen as fuel. As this is ecologically pure fuel.
But storage and transportation of hydrogen are rather
dangerous. Therefore plasma technologies for fuel
reforming is represent a major interest. Adding of free
hydrogen in fuel reduces harmful exhaust and increase
burning efficiency of fuel. The additions of hydrogen
reduced quantity of NOx. Besides thus the octane number
of fuel is increased. The results were received in
Massachusetts Institute of Technology, at work with fuel
received from petroleum [1]. The addition of hydrogen
raises of burning efficiency: there is faster lighting of a
mix, the wave of burning is distributed faster and there is
more complete combustion of a mix. The efficiency of the
engine is increased by 30 %, and in exhaust by 80 %
decreases the quantity of NOx. It is very important, that
this method does not demand alteration of the engine.
For study of burning efficiency the ethanol was used
in our researches. It is urgent and it is economically
favourable, as the ethanol can be received from different
agricultural cultures by using known technologies.
2. EXPERIMENTAL SET-UP
The hydrogen was obtained by plasma reforming of
ethanol. Experimental set-up for reforming of liquid
hydrocarbons is shown on Fig.1. It consists of a quartz tube
from above tightly closed by a cover. Both the system of
gas inlet, outlet, and electrodes system, between which is
igniting the auxiliary discharge in the gas channel with a
liquid wall, were built in the cover. The tube from below
was closed by flange, which was one of the electrodes of
secondary discharge. The plasma of glow discharge was
another electrode of the secondary discharge. Both the
discharges auxiliary (Is) and secondary (Id) were ignited
from sources of a constant voltage. The discharges were
burned in volume of ethanol. The volume of ethanol was
hold constant with the help of informed vessels system. As
a result of such treatment on the outlet of reactor the mix
air + C2H5OH + H2 + CxHy +… was obtained. For
removal from mix of ethanol vapour it was directed to a
condenser.
At the treatment of pure ethanol in the plasma
reformer except free hydrogen in a liquid the solid phase
soot was formed. This property was used for generation of
nanoparticles in this system. For burning we needed to
reduce quantity of soot, which was formed during
experiments. The distillate added to ethanol with this
purpose.
The measurements of emission spectra of plasma in a
mix ethanol + distillate in a range of the attitude of
concentration from 0 up to 96 % were spent during the work.
Plasma radiation was measured by portable rapid PC-
operated CCD-based multi-channel optical spectra
analyser (MOSA), which has a wide wavelength survey
(200-1100 nm) with spectral resolution (~0.2 nm).
3. RESULTS AND DISCUSSIONS
Some emission spectra of the discharge in the gas
channel with a liquid wall for various compound of a mix
are shown on Fig.2 and Fig.3: Fig.2 - pure ethanol
(Is=200 m ; Us=1,5 kV; Ud=2,2 kV; Id=0 m ); Fig.3 -
58 ml of ethanol + 36 ml of distillate (Is=200 m ;
Us=2,4 kV; Ud=2,0 kV; Id=0 m ).
Fig.1. Experimental set-up: 1, 2 – electrodes of auxiliary
discharge, 3 –electrode of secondary discharge,
4 - glass pipes, 5 - gas bubbles
mailto:yvitaliy@ukr.net
mailto:naumov@ifpht.kiev.ua
143
It is visible that at increase of quantity of water in a
mix intensity of a hydrogen line Ha is decreases. At the
same time the relative share of hydrogen, in comparison
with bands of 2 and N [2], is considerably increased at
practically constant temperature.
The intensity distributions of emission spectral line Ha
from distillate concentrations in solution is shown on
Fig.4. It is visible, that at change of distillate
concentration in a solution in a range from 0 up to 1
intensity of a hydrogen line decreases not considerably.
But thus the quantity of generated soot, during plasma
reforming, considerably decreases. These results are
shown on Fig.5.
The determination of burning efficiency is a
sufficiently difficult task. The various techniques are used
for research of this question. The automobile companies
use engines as test devices, apply devices principle of
operation of which is based on colorimetric of fuel. We
offered a plasma method for testing of burning efficiency
of fuel. It is based on the basis of the transversal arc
discharge, which burns in a flow of fuel or combustible
mixes. This method allow investigate are: comparison of
distributions of optical emission spectra of plasma in arc,
comparison of distributions of different energy plasma
parameters in arc, change of the shape of a plasma torch
of arc, calorimetric of arc.
The scheme of experimental set-up for examination of
plasma-assisted combustion of reformed ethanol: after
plasma reforming a mix air + H2 + CxHy +… added to the
basic flow air + ethanol, in which transverse arc discharge
was ignited. The scheme of reception of air and ethanol
basic flow - the flow of air was supplied in test-tube with
ethanol. The mix of air + ethanol was obtained on the
outlet of test-tube. To change the proportion between
mixed components the heating of the ethanol was carried
out. The discharge was ignited in the obtained mix
between two copper electrodes from a source of a
constant voltage.
The temperatures distributions of excited electron
level population of copper and oxygen atoms along to the
gas flow for a case of burning of discharge in air and in a
fuel mix decreasing along to the gas flow under the linear
law.
The comparison of temperatures distributions for
plasma of air and plasma of a mix is shown that the
addition of impoverished fuel mix in the discharge does
not influence on temperatures distributions of electron
level population of electrodes material atoms and
components of blowing gas. And it is clear as exists
exponential dependence of speed of energy levels
population from temperature.
Fig.3. The typical emission spectrum of the discharge in
the gas channel with liquid hydrocarbon (ethanol +
distillate) wall
Fig.2. The typical emission spectrum of the discharge in
the gas channel with liquid hydrocarbon (ethanol) wall
0
500
1000
1500
2000
2500
3000
3500
0 0,5 1 1,5 2 2,5
Nw/Net
I, a.u.
Ha
Fig.4. The typical dependence of intensity of a line of
hydrogen on the relation of concentrations of water to
concentration of ethanol
-1
0
1
2
3
4
5
6
0 0,5 1 1,5 2 2,5
Nw/Net
I/I
C2/Ha
CN/Ha
Fig.5. The typical dependence of intensity of C2 and
CN bands on the relation of concentrations of water to
concentration of ethanol
144
The scheme of the test device for definition of burning
efficiency with use of calorimetric measurements is
shown on Fig.6.
The transversal arc discharge burns in a flow of a
combustible mix inside of the metal cylinder with a cone
end. In a bottom of a cone there is an aperture serving for
release of gas. The cone is placed in the water with
temperature that fixed with the help of the thermocouple.
The results of research are represented on Fig.7, where
the water temperature dependences on the arc burning
time are shown. The temperature of water grows with
increase of fuel concentration in a mix. It is necessary to
note, that the given method is very sensitive, as we work
with impoverished mixes which basically do not burn.
CONCLUSIONS
The experimental results obtained in our laboratory
have shown that the plasma liquid systems with secondary
discharges can be very effective for reforming of liquid
fuels.
The experimental results show that transverse arc
plasma could be efficiently applied for assisting
combustion of impoverished hydrocarbon-air mixes.
The offered plasma method of definition of burning
efficiency of fuel based on the transversal arc discharge is
highly sensitive.
ACKNOWLEDGEMENTS
This work was partially supported by the Ukrainian
Ministry of Education and Science, grant M/176-2006
and by the Taras Shevchenko Kyiv National University,
grant 06 BP 052-03.
REFERENCES
1. D.R. Cohn. Environmental Protection And Energy
Savings Using Plasma Technology // Plasma Science and
Fusion Center Massachusetts Institute of Technology,
March 10, 2004, http://www.psfc.mit.edu/research.
2. R.W.B. Pears and A. G. Gaydon. The identification of
molecular spectra. N.Y.: “Chapman and Hall”, 1976.
,
. , . , . , . , .
.
.
.
+ .
.
.
,
. , . , . , . , .
.
.
.
+ .
.
.
Gas
Water
Arc Tw,ºC
Fig.6. Scheme of calorimeter
0
10
20
30
40
50
60
70
0 5 10 15 20t, min
T, C
Air
Air+Ethanol (33:1)
Air+Ethanol (15:1)
Air+Ethanol (8:1)
Fig.7. Dependences of water temperature in a
calorimeter on the arc burning time
http://www.psfc.mit.edu/research.
|
| id | nasplib_isofts_kiev_ua-123456789-110511 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-11-28T12:01:37Z |
| publishDate | 2007 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Yukhymenko, V.V. Chernyak, V.Ya. Naumov, V.V. Veremii, Iu.P. Zrazhevskij, V.A. 2017-01-04T17:27:45Z 2017-01-04T17:27:45Z 2007 Combustion of ethanol+air mixture supported by transverse arc plasma / V.V. Yukhymenko, V.Ya. Chernyak, V.V. Naumov, Iu.P. Veremii, V.A. Zrazhevskij // Вопросы атомной науки и техники. — 2007. — № 1. — С. 142-144. — Бібліогр.: 2 назв. — англ. 1562-6016 PACS: 52.77.-j, 52.80.-s, 52.50.Dg https://nasplib.isofts.kiev.ua/handle/123456789/110511 The influence of preliminary plasma reforming of fuel on plasma combustion efficiency was investigated. The ethanol was chosen as researched fuel. The electrical discharge in the gas channel with a liquid wall was used for preliminary ethanol reforming. The burning was supported by transverse arc discharge in a flow of mix air + reformed ethanol. Emission spectroscopy of plasma was applied to control of burning process. Offered a plasma method for testing of burning efficiency of fuel. Досліджувався вплив попереднього плазмового реформування палива на ефективність горіння. В якості досліджуваного палива використовувався спирт. Для попереднього реформування спирту використовувався електричний розряд в газовому каналі з рідкою стінкою. Горіння підтримувалось за допомогою поперечного дугового розряду в потоці суміші повітря + реформований спирт. Для контролю процесів горіння використовувалась емісійна спектроскопія плазми. Запропоновано плазмовий метод для тестування ефективності горіння палива. Исследовалось влияние предварительного плазменного реформирования топлива на эффективность горения. В качестве исследуемого топлива использовался спирт. Для предварительного реформирования спирта использовался электрический разряд в газовом канале с жидкой стенкой. Горение поддерживалось с помощью поперечного дугового разряда в потоке смеси воздух + реформированный спирт. Для контроля процессов горения использовалась эмиссионная спектроскопия плазмы. Предложен плазменный метод для тестирования эффективности горения топлива. This work was partially supported by the Ukrainian Ministry of Education and Science, grant ʋ M/176-2006 and by the Taras Shevchenko Kyiv National University, grant ʋ 06 BP 052-03 en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Low temperature plasma and plasma technologies Combustion of ethanol+air mixture supported by transverse arc plasma Горіння суміші спирт+повітря, що підтримується плазмою поперечної дуги Горение смеси спирт+воздух, поддерживаемое плазмой поперечной дуги Article published earlier |
| spellingShingle | Combustion of ethanol+air mixture supported by transverse arc plasma Yukhymenko, V.V. Chernyak, V.Ya. Naumov, V.V. Veremii, Iu.P. Zrazhevskij, V.A. Low temperature plasma and plasma technologies |
| title | Combustion of ethanol+air mixture supported by transverse arc plasma |
| title_alt | Горіння суміші спирт+повітря, що підтримується плазмою поперечної дуги Горение смеси спирт+воздух, поддерживаемое плазмой поперечной дуги |
| title_full | Combustion of ethanol+air mixture supported by transverse arc plasma |
| title_fullStr | Combustion of ethanol+air mixture supported by transverse arc plasma |
| title_full_unstemmed | Combustion of ethanol+air mixture supported by transverse arc plasma |
| title_short | Combustion of ethanol+air mixture supported by transverse arc plasma |
| title_sort | combustion of ethanol+air mixture supported by transverse arc plasma |
| topic | Low temperature plasma and plasma technologies |
| topic_facet | Low temperature plasma and plasma technologies |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/110511 |
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