Conversion of ethanol in dynamic plasma-liquid system
Experimental and theoretical research of the process of low-temperature transformations of mixture ethanol/water in nonequilibrium plasma of the electric discharge in gas channel with fluid wall was carrying out. The gas channel in liquids was created by two counter airstreams in liquids and vapor...
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| Zitieren: | Conversion of ethanol in dynamic plasma-liquid system / V.V. Yukhymenko, M.O. Verovchuk, S. Olshewskii, V.Ya. Chernyak, V.A. Zrazhevskij, V.P. Demchina, V.S. Kudryavzev, A.I. Shchedrin, D.S. Levko, V.V. Naumov // Вопросы атомной науки и техники. — 2009. — № 1. — С. 128-130. — Бібліогр.: 4 назв. — англ. |
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irk-123456789-883172015-11-12T03:02:02Z Conversion of ethanol in dynamic plasma-liquid system Yukhymenko, V.V. Verovchuk, M.O. Olshewskii, S. Chernyak, V.Ya. Zrazhevskij, V.A. Demchina, V.P. Kudryavzev, V.S. Shchedrin, A.I. Levko, D.S. Naumov, V.V. Низкотемпературная плазма и плазменные технологии Experimental and theoretical research of the process of low-temperature transformations of mixture ethanol/water in nonequilibrium plasma of the electric discharge in gas channel with fluid wall was carrying out. The gas channel in liquids was created by two counter airstreams in liquids and vapor of the liquids. The gas chromatography and massspectrometric techniques for investigation of stable gas-phase conversion products were used. The power inputs on conversion of mixture in synthesis – gas were measured. The values of efficiency, coefficient of energy transformation, specific energy requirement of system were calculated. Experimental results indicate the possibility and efficiency of plasmachemical conversions of ethanol in syntheses-gas in such plasma-liquid system of the atmospheric pressure. Проводилось експериментальне та теоретичне дослідження процесів низькотемпературного перетворення суміші етанол/вода в нерівноважній плазмі електричного розряду в газовому каналі з рідкою стінкою. Газовий канал в рідині створювався двома зустрічними потоками повітря в рідині та парах рідини. Для дослідження стабільних газо-фазних продуктів конверсії використовувались газова хроматографія та мас-спектрометрична методика. Вимірювались енерговитрати на конверсію суміші в синтез газ. Обраховувались ефективність, коефіцієнт трансформації енергії та питоме споживання енергії системи. Результати експериментів показали можливість та ефективність плазмохімічної конверсії етанолу в синтез-газ в такій плазмово-рідинній системі атмосферного тиску. Проводилось экспериментальное и теоретическое исследование процессов низкотемпературного превращения смеси этанол/вода в неравновесной плазме электрического разряда в газовом канале с жидкой стенкой. Газовый канал в жидкости создавался двумя встречными потоками воздуха в жидкости и парах жидкости. Для исследования стабильных газо-фазных продуктов конверсии использовались газовая хроматография и масс-спектрометрическая методика. Измерялись энергозатраты на конверсию смеси в синтез- газ. Рассчитывались эффективность, коэффициент трансформации энергии и удельное потребление энергии системы. Результаты экспериментов показали возможность и эффективность плазмохимической конверсии этанола в синтез-газ в такой плазменно-жидкостной системе атмосферного давления. 2009 Article Conversion of ethanol in dynamic plasma-liquid system / V.V. Yukhymenko, M.O. Verovchuk, S. Olshewskii, V.Ya. Chernyak, V.A. Zrazhevskij, V.P. Demchina, V.S. Kudryavzev, A.I. Shchedrin, D.S. Levko, V.V. Naumov // Вопросы атомной науки и техники. — 2009. — № 1. — С. 128-130. — Бібліогр.: 4 назв. — англ. 1562-6016 PACS: 50.00.00, 52.00.00, 52.50.Dg. http://dspace.nbuv.gov.ua/handle/123456789/88317 en Вопросы атомной науки и техники Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Низкотемпературная плазма и плазменные технологии Низкотемпературная плазма и плазменные технологии |
| spellingShingle |
Низкотемпературная плазма и плазменные технологии Низкотемпературная плазма и плазменные технологии Yukhymenko, V.V. Verovchuk, M.O. Olshewskii, S. Chernyak, V.Ya. Zrazhevskij, V.A. Demchina, V.P. Kudryavzev, V.S. Shchedrin, A.I. Levko, D.S. Naumov, V.V. Conversion of ethanol in dynamic plasma-liquid system Вопросы атомной науки и техники |
| description |
Experimental and theoretical research of the process of low-temperature transformations of mixture ethanol/water in
nonequilibrium plasma of the electric discharge in gas channel with fluid wall was carrying out. The gas channel in
liquids was created by two counter airstreams in liquids and vapor of the liquids. The gas chromatography and massspectrometric
techniques for investigation of stable gas-phase conversion products were used. The power inputs on
conversion of mixture in synthesis – gas were measured. The values of efficiency, coefficient of energy transformation,
specific energy requirement of system were calculated. Experimental results indicate the possibility and efficiency of
plasmachemical conversions of ethanol in syntheses-gas in such plasma-liquid system of the atmospheric pressure. |
| format |
Article |
| author |
Yukhymenko, V.V. Verovchuk, M.O. Olshewskii, S. Chernyak, V.Ya. Zrazhevskij, V.A. Demchina, V.P. Kudryavzev, V.S. Shchedrin, A.I. Levko, D.S. Naumov, V.V. |
| author_facet |
Yukhymenko, V.V. Verovchuk, M.O. Olshewskii, S. Chernyak, V.Ya. Zrazhevskij, V.A. Demchina, V.P. Kudryavzev, V.S. Shchedrin, A.I. Levko, D.S. Naumov, V.V. |
| author_sort |
Yukhymenko, V.V. |
| title |
Conversion of ethanol in dynamic plasma-liquid system |
| title_short |
Conversion of ethanol in dynamic plasma-liquid system |
| title_full |
Conversion of ethanol in dynamic plasma-liquid system |
| title_fullStr |
Conversion of ethanol in dynamic plasma-liquid system |
| title_full_unstemmed |
Conversion of ethanol in dynamic plasma-liquid system |
| title_sort |
conversion of ethanol in dynamic plasma-liquid system |
| publisher |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| publishDate |
2009 |
| topic_facet |
Низкотемпературная плазма и плазменные технологии |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/88317 |
| citation_txt |
Conversion of ethanol in dynamic plasma-liquid system / V.V. Yukhymenko, M.O. Verovchuk, S. Olshewskii, V.Ya. Chernyak, V.A. Zrazhevskij, V.P. Demchina, V.S. Kudryavzev, A.I. Shchedrin, D.S. Levko, V.V. Naumov // Вопросы атомной науки и техники. — 2009. — № 1. — С. 128-130. — Бібліогр.: 4 назв. — англ. |
| series |
Вопросы атомной науки и техники |
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2025-07-06T16:04:40Z |
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2025-07-06T16:04:40Z |
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| fulltext |
LOW TEMPERATURE PLASMA AND PLASMA TECHNOLOGIES
128 PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2009. № 1.
Series: Plasma Physics (15), p. 128-130.
CONVERSION OF ETHANOL IN DYNAMIC PLASMA-LIQUID SYSTEM
V.V. Yukhymenko1, M.O. Verovchuk1, S. Olshewskii1, V.Ya. Chernyak1, V.A. Zrazhevskij1,
V.P. Demchina2, V.S. Kudryavzev2, A.I. Shchedrin 3, D.S. Levko 3, V.V. Naumov4
1 Taras Shevchenko National University of Kyiv, Faculty of Radiophysics, Dept. of Physical
Electronics, Kyiv, Ukraine, E-mail: yvitaliy@ukr.net;
2The Gas Institute, NASU, Kyiv, Ukraine;
3Institute of Physics, NASU, Kyiv, Ukraine, E-mail: ashched@iop.kiev.ua;
4Institute of Fundamental Problems for High Technology, NASU, Kyiv, Ukraine
Experimental and theoretical research of the process of low-temperature transformations of mixture ethanol/water in
nonequilibrium plasma of the electric discharge in gas channel with fluid wall was carrying out. The gas channel in
liquids was created by two counter airstreams in liquids and vapor of the liquids. The gas chromatography and mass-
spectrometric techniques for investigation of stable gas-phase conversion products were used. The power inputs on
conversion of mixture in synthesis – gas were measured. The values of efficiency, coefficient of energy transformation,
specific energy requirement of system were calculated. Experimental results indicate the possibility and efficiency of
plasmachemical conversions of ethanol in syntheses-gas in such plasma-liquid system of the atmospheric pressure.
PACS: 50.00.00, 52.00.00, 52.50.Dg.
1. INTRODUCTION
Fig. 1 Experimental set-up for conversion of ethanol in
synthesis – gas.
Air
Outlet of gas
4
H2O
Inlet
8
9
4
7
2
6
1
5
3
Air
2
10
H2O
Outlet
Т, °С
Plasma reforming of hydrocarbons is used by several
experimental groups. Conversion of heavy hydrocarbons
(HC) into the free hydrogen (H2), carbon monoxide (CO)
and other easily burning fractions allows improving
efficiency of combustion and reducing atmospheric air
pollution [1]. Research on alternative bio-fuels which can
replace traditional fossil fuels, petrol and natural gas is
also very actual due to environmental and energy saving
problems [2]. The first trial in comparison of all existing
technologies of plasma reforming system belongs to CEP
[3]. In this article they provide an overview of the setting
up, feasibility and efficiency of the existing technologies.
The aim of this work was to calculate coefficient of
energy transformation and efficiency for the conversion
of ethanol in the poorly investigated electrical discharge
in the gas channel with a liquid wall (DGCLW).
2. EXPERIMENTAL SET-UP
Experimental set-up for conversion of ethanol in
synthesis – gas is shown on Fig. 1. It consists of a
cylindrical quartz test-vessel (1) sealed at the top and at
the bottom by duralumin flanges (2) with a built-in
electrode system (3). The cooper rod electrodes (3) were
inserted into the quarts tubes (4) and installed coaxially
one opposite other. The tubes (4) served also for the gas
(air) inlet. A compressed atmospheric air was injected
along electrodes (3) through the open nozzle ends (4) and
formed a stable counter-flow gas channel surrounding by
liquid ethanol (6). The electric discharge (5) was burned
in the gas channel between the immersed electrodes
where an electric breakdown occurred. The ethanol/water
solution (5 mole of ethanol: 1 mole of water) was filled
into the reactor through the drain pipe (7) at the bottom
flange. The outlet connections (8) and (9) at the top flange
were connected with a system of communicating vessels
allowing control of the liquid level and pressure in the
reactor.
The outlet pipe (9) served for transportation of the
synthesis gas products from the reactor to the condensing
vessel and further to the gas analysis. Because of the
electric-discharge heat release and heating of plasma-
treated solution in the reactor, an auxiliary cooling was
provided by the water-cooled jacket (10). The temperature
of work solution in the reactor was measured by the
immersed thermocouple.
The mass-spectrometric and gas chromatography
techniques for investigation of stable gas-phase
conversion products were used. The monopole mass-
spectrometer was used for the mass analysis.
The different modes of operations setting were
investigated: the mode when “+” put to the electrode
mounted in lower flange, and “-” put to the liquid
(“liquid” cathode); the mode when “-” put to the electrode
mounted in lower flange, and “+” put to the liquid
(“liquid” anode); the mode with two solid electrodes.
On Fig. 2 shows typical current-voltage characteristics
of the DGCLW in ethanol-water solution 5:1 for three
different modes.
129
of air flowing through the reactor decreases, therefore, H2
efficient of energy
tra
3. RESULTS AND DISCUSSIONS
Comparison of calculations with experimental data is
shown on Fig. 3. One can see that in case of T = 323K (as
measured by thermocouple) calculated concentrations of
most components are close to experimental values, while
in case of T = 355 K some components essentially differ.
At the same time, concentration of H2 does not vary very
much, because, on one side, content of water vapours in
the reactor increases leading to the H increasing, and,
therefore, to increasing of H2; on the other side, the time
yield decreases. Under the influence of complementary
factors content of H2 is steady-state.
On the grounds of calculation of co
nsformation - α (Fig. 4) and parameter of efficiency - η
(Fig. 5) with use of thermochemical constants [4] is carry
out comparison of plasmachemical efficiency of
conversions of liquid ethanol in electric discharge in gas
channel with liquid wall for different modes.
Coefficient of energy transformation was numerically
calculate according following expression:
IPE
YLHVY i
i
i )(×
=
∑
α . (1)
0
0,5
1
1,5
2
2,5
3
3,5
4
0 100 200 300 400 500
I, mA
U, kV liquid "-"
liquid "+"
solid lectrodes
Fig. 2 Current-voltage characteristics of the
DGCLW in ethanol-water solution.
0
0,4
0,8
1,2
1,6
2
0 200 400 600 800
P, W
α liquid "-"
liquid "+"
solid lectrodes
Fig. 4 Coefficient of energy transformation.
Parameter to efficiency was defined on [3]:
)(
)()( 22
HCLHVYIPE
HLHVYY
HC
COH
×+
×+
=η , (2)
here IPE is the input plasma energy, Y is the molar
fraction and LHV is the lower heating value of syngas
components, HC is the hydrocarbon fuel (ethanol). The
formula (2) assumes that CO can be totally transformed
into H2.
0
10
20
30
40
50
60
H2 CO CH4 CО2 C2Н4 C2Н6 C2Н2
T=323 K (c)
T=355 К (c)
I=200 mА (e)
I=300 mА (e)
I=400 mА (e)
Yi
Yi, %
Fig. 3 Component content of syngas
products.
0
10
20
30
40
50
60
0 200 400 600 800P, W
η, %
liquid "-"
liquid "+"
solid lectrodes
Fig. 5 Energy efficiency of ethanol reforming.
Comparison of plasmachemical efficiency of
conversions of liquid ethanol in electric discharge in gas
channel with liquid wall with other known
plasmachemical methods is shown on Fig. 6.
4. It was shown that electric discharge in gas channel
with liquid wall have high power efficiency and
efficiency of the non-equilibrium plasma processes
comparable to other known gas-discharge plasma sources
of the atmospheric pressure such as diaphragm and arc
types.
ACKNOWLEDGEMENTS
This work is partially supported by Grant No.
06БП05203 of Taras Shevchenko Kyiv National
University.
REFERENCES
0
10
20
30
40
50
60
MIT (GEN 3) Waseda
University
(Diaphragm
Reactor)
liquid "-" liquid "+" solid
electrodes
η, % 50 mA
100 mA
200 mA
300 mA
400 mA
Fig. 6 Efficiency of non-thermal plasma processes.
1. J. Warrantz, U. Maas, R. W. Dіbble. Combustion.
Physical and Chemical Fundamentals, Modeling and
Simulations, Experiments, Pollutant Formation. Berlin:
“Springer”, 2001.
2. K. Agarwal. Biofuels (alcohol and biodiesel)
applications as fuels for internal combustion engines //
Prog. Energy & Combust. Sci. 2007, v. 33, p. 233-271.
4. CONCLUSIONS
1. The dynamic plasma-liquid system with the electric
discharge in a gas channel with liquid wall is quite
efficient in plasma-chemical reforming of liquid ethanol
into synthesis gas.
3. G. Petitpas, J.-D. Rollier, A. Darmon, J. Gonzalez-
Aguilar, R. Metkemeijer, and L. Fulcheri. A
comparative study of non-thermal plasma assisted
reforming technologies // Int. J. Hydrogen Energy.
2007, v. 32, p. 2848-2867. 2. At the ethanol reforming in the system with the
electric discharge in a gas channel with liquid wall in
mode with “liquid” electrodes is formed more gas than in
mode with two solid electrodes.
4. NIST Standard Reference Databases Online, 2007.
http://www.nist.gov/srd/
3. The minimal value of power inputs in investigated
discharge modes is ~2.4 kWh/m3 at the power of output
syngas of ~4.4 kWh/m3.
Article received 24.10.08
КОНВЕРСИЯ ЭТАНОЛА В ДИНАМИЧЕСКОЙ ПЛАЗМЕННО-ЖИДКОСТНОЙ СИСТЕМЕ
В.В. Юхименко, М.А. Веровчук, С.В. Ольшевский, В.Я. Черняк, В.А. Зражевский, В.П. Демчина,
В.С. Кудрявцев, А.И. Щедрин, Д.С. Левко, В.В. Наумов
Проводилось экспериментальное и теоретическое исследование процессов низкотемпературного
превращения смеси этанол/вода в неравновесной плазме электрического разряда в газовом канале с жидкой
стенкой. Газовый канал в жидкости создавался двумя встречными потоками воздуха в жидкости и парах
жидкости. Для исследования стабильных газо-фазных продуктов конверсии использовались газовая
хроматография и масс-спектрометрическая методика. Измерялись энергозатраты на конверсию смеси в синтез-
газ. Рассчитывались эффективность, коэффициент трансформации энергии и удельное потребление энергии
системы. Результаты экспериментов показали возможность и эффективность плазмохимической конверсии
этанола в синтез-газ в такой плазменно-жидкостной системе атмосферного давления.
КОНВЕРСІЯ ЕТАНОЛУ В ДИНАМІЧНІЙ ПЛАЗМОВО-РІДИННІЙ СИСТЕМІ
В.В. Юхименко, М.О. Веровчук, С.В. Ольшевський, В.Я. Черняк, В.А. Зражевський, В.П. Демчина,
В.С. Кудрявцев, А.І. Щедрин, Д.С. Левко, В.В. Наумов
Проводилось експериментальне та теоретичне дослідження процесів низькотемпературного перетворення
суміші етанол/вода в нерівноважній плазмі електричного розряду в газовому каналі з рідкою стінкою. Газовий
канал в рідині створювався двома зустрічними потоками повітря в рідині та парах рідини. Для дослідження
стабільних газо-фазних продуктів конверсії використовувались газова хроматографія та мас-спектрометрична
методика. Вимірювались енерговитрати на конверсію суміші в синтез газ. Обраховувались ефективність,
коефіцієнт трансформації енергії та питоме споживання енергії системи. Результати експериментів показали
можливість та ефективність плазмохімічної конверсії етанолу в синтез-газ в такій плазмово-рідинній системі
атмосферного тиску.
130
http://www.nist.gov/srd/
This work is partially supported by Grant No. 06БП05203 of Taras Shevchenko Kyiv National University.
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