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Tytuł:
The Origin of Life: Atmospheric Hypothesis
Autorzy:
Zemnukhov, Vladimir V.
Powiązania:
https://bibliotekanauki.pl/articles/42802893.pdf
Data publikacji:
2024
Wydawca:
Polska Akademia Nauk. Instytut Filozofii i Socjologii PAN
Tematy:
Origin of life
non-equilibrium
chirality
ancient Earth
atmosphere
protobionts
Venus
Opis:
An original hypothesis of the origin of life in an atmosphere of ancient Earth is proposed. It is shown that the atmospheric conditions of ancient Earth had been beneficial not only for initial abiogenic synthesis of organic monomers, but also for their polymerization and decomposition of protobiopolymers. Protobionts are particles of water aerosol the size of 1–10 microns. The proposed hypothesis can tie together all relevant facts on the early Earth’s history, antiquity and ecology features of methanogenic Achaea, the small size of prokaryotes, the discovery of fossilized prokaryotes in meteorites and others. The hypothesis provides an opportunity to consider the evolution of all principal components of the cell in a continuous relationship with each other and with the environment, from the earliest stages of the origin of life. According to the proposed hypothesis, the origin of life can be considered in conjunction with the development of formation of biogeochemical cycles as a natural process, which is an integral part of the birth of planets.
Źródło:
Filozofia i Nauka; 2024, 12; 55-63
2300-4711
2545-1936
Pojawia się w:
Filozofia i Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SRH suppression mechanism in a non-equilibrium MWIR HgCdTe photodiode
Autorzy:
Kopytko, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2204220.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
HgCdTe photodiode
non-equilibrium conditions
fully-depleted photodiode
minority carrier lifetime
generation rates
Opis:
The operation of narrow-gap semiconductor devices under non-equilibrium mode is used at temperatures where the materials are normally intrinsic. The phenomenon of minority carrier exclusion and extraction was particularly discussed in the case of the suppression of Auger thermal generation in heterojunction photodiodes, especially important in the long-wave infrared range. This paper shows that the reduction of the dark current in the HgCdTe photodiode operating in the mid-wave infrared range is primarily the result of suppression of the Shockley-Read-Hall generation in the non-equilibrium absorber. Under a reverse bias, the majority carrier concentration is held equal to the majority carrier doping level. This effect also leads to a decreased majority carrier population at the trap level and an effective increase in the carrier lifetime. The analysed device was with the following design: p+-Bp cap-barrier unit, p-type absorber doped at the level of 8 ·10¹⁵ cm¯³, and wide-bandgap N+ bottom contact layer. At room temperature, the lowest dark current density of 3.12 ·10¯¹ A/cm² was consistent with the theoretically predicted Shockley-Read-Hall suppression mechanism, about two times smaller than for the equilibrium case.
Źródło:
Opto-Electronics Review; 2023, 31, Special Issue; art. no. e144548
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical study of an unsteady non-premixed flame in a porous medium based on the thermal equilibrium model
Autorzy:
Pakdee, Watit
Sakkarangkoon, Thammasathit
Powiązania:
https://bibliotekanauki.pl/articles/1839676.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
porous combustion
non-premixed combustion
local thermal equilibrium
pseudohomogeneous
numerical model
Opis:
The present research numerically investigates the non-premixed combustion of CH4 in a porous medium. The mathematical model proposed consists of conservation of mass, momentum, energy, and species equations. The discretized equations are integrated according to the third - order Runge - Kutta method. A porous medium is defined as a pseudohomogeneous medium. The proposed unsteady model is successfully validated with the published study. The model is able to describe physical behaviors of a non-premixed flame. The porous structure made of SiC gives higher temperature than when Al2O3 is used since SiC has higher thermal conductivity and lower heat capacity.
Źródło:
Journal of Theoretical and Applied Mechanics; 2021, 59, 3; 401-412
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wet steam flow in 1100 MW turbine
Autorzy:
Jun, Gukchol
Kolovratník, Michal
Hoznedl, Michal
Powiązania:
https://bibliotekanauki.pl/articles/1954998.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steam turbine
wet steam
loss
non-equilibrium condensation
CFD
Opis:
The paper deals with the wet steam flow in a steam turbine operating in a nuclear power plant. Using a pneumatic and an optical probe, the static pressure, steam velocity, steam wetness and the fine water droplets diameter spectra were measured before and beyond the last turbine low-pressure stage. The results of the experiment serve to understand better the wet steam flow and map its liquid phase in this area. The wet steam data is also used to modify the condensation model used in computational fluid dynamics simulations. The condensation model, i.e. the nucleation rate and the growth rate of the droplets, is adjusted so that results of the numerical simulations are in a good agreement with the experimental results. A 3D computational fluid dynamics simulations was performed for the lowpressure part of the turbine considering non-equilibrium steam condensation. In the post-processing of the of the numerical calculation result, the thermodynamic wetness loss was evaluated and analysed. Loss analysis was performed for the turbine outputs of 600, 800, and 1100 MW, respectively.
Źródło:
Archives of Thermodynamics; 2021, 42, 3; 63-85
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Almost “very strong” multilane turnpike effect in a non‑stationary Gale economy with a temporary von Neumann equilibrium and price constraints
Autorzy:
Panek, Emil
Powiązania:
https://bibliotekanauki.pl/articles/971497.pdf
Data publikacji:
2020-06-15
Wydawca:
Uniwersytet Ekonomiczny w Poznaniu
Tematy:
non-stationary Gale economy
temporary von Neumann equilibrium
multilane production turnpike
Opis:
Mathematical models of economic dynamics and growth are usually expressed in terms of diefrential equations/inclusions (in the case of continuous time) or diefrence equations/inclusions (if discrete time is assumed). 3 hTis class of models includes von Neumann-Leontief-Gale type dynamic input-output models to which the paper refers. eTh paper focuses on the turnpike stability of optimal growth processes in a Gale non-stationary economy with discrete time in the neighbourhood of von Neumann dynamic equilibrium states (so-called growth equilibrium). eTh paper refers to Panek (2019, 2020) and shows an intermediate result between the strong and very strong turnpike theorem in the non-stationary Gale economy with changing technology assuming that the prices of temporary equilibrium in such an economy (so-called von Neumann prices) do not change rapidly. eTh aim of the paper is to bring mathematical proof that the introduction of these assumptions making the model more realistic does not change its asymptotic (turnpike-like) properties.
Źródło:
Economics and Business Review; 2020, 6, 2; 66-80
2392-1641
Pojawia się w:
Economics and Business Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of addition of carbon nanotubes on rheological properties of selected liquid lubricants - a computer simulation study
Autorzy:
Chopra, Anjali
Winczewski, Szymon
Powiązania:
https://bibliotekanauki.pl/articles/1954594.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska
Tematy:
nanotechnology
tribology
lubricants
rheology
propylene glycol
carbon nanotubes
non-equilibrium molecular dynamics
nanotechnologia
tribologia
smary
reologia
glikol propylenowy
nanorurki
nierównowagowa dynamika molekularna
Opis:
This work is motivated by the improvement of anti-friction properties of lubricants by addition of CNTs proved experimentally in literature. In particular, a methodology is developed to compute the shear viscosity of liquid lubricants (Propylene Glycol) based on Molecular Dynamics simulation. Non-Equilibrium molecular dynamics (NEMD) approach is used with a reactive force field ReaxFF implemented in LAMMPS. The simulations are performed using the canonical (NVT) ensemble with the so-called SLLOD algorithm. Couette flow is imposed on the system by using Lees-Edwards periodic boundary conditions. Suitable parameters such as simulation time and imposed shear velocity are obtained. Using these parameters, the influence of addition of 27 wt% CNTs to Propylene Glycol on its viscosity is analyzed. Results show that 3.2 million time-steps with a 0.1 fs time-step size is not sufficient for the system to reach equilibrium state for such calculations. With the available computational resources, a shear velocity of 5 × 10−5 Å/fs was observed to give viscosity value with approximately 43% error as compared to the experimental value. Moreover, the lubricant exhibited a shear thinning behaviour with increasing shear rates. CNTs enhanced the lubricant's viscosity by 100-190% depending upon the averaging method used for calculation.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2020, 24, 4; 345-388
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multilane turnpike in the non-stationary input-output economy with von Neumann temporary equilibrium
Autorzy:
Panek, Emil
Powiązania:
https://bibliotekanauki.pl/articles/1043906.pdf
Data publikacji:
2020-08-18
Wydawca:
Główny Urząd Statystyczny
Tematy:
non-stationary Gale economy
von Neumann temporary equilibrium
multilane turnpike
Opis:
In the author's earlier papers concerning asymptotic characteristics of the optimal growth processes in non-stationary Gale economies with multilane production turnpikes, it is assumed that production technology used in time period may also be used in the next period. Such an assumption, relevant for short periods, is difficult to justify in the longer term. The paper contains a proof of the so called 'weak' effect of the multilane turnpike in a non-stationary Gale economy with changing technology, where this assumption has been suspended.
Źródło:
Przegląd Statystyczny; 2020, 67, 1; 77-92
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura i dynamika wielogeneracyjnych starodrzewów sosnowych występujących w obszarach ochrony ścisłej Kaliszki i Sieraków w Kampinoskim Parku Narodowym. Część 2. Procesy zamierania i dorastania oraz ich wpływ na rozkład grubości drzew
Structure and dynamics of uneven−aged, Scots pine−dominated, old−growth stands in Kaliszki and Sieraków strict reserves in Kampinos National Park. Part 2. Tree mortality and recruitment processes and their effects on tree diameter distributions
Autorzy:
Brzeziecki, B.
Zajączkowski, J.
Olszewski, A.
Bolibok, L.
Andrzejczyk, T.
Bielak, K.
Buraczyk, W.
Drozdowski, S.
Gawron, L.
Jastrzębowski, S.
Szeligowski, H.
Żybura, H.
Powiązania:
https://bibliotekanauki.pl/articles/979128.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
demographic non−equilibrium
diameter structure
long−term study
old−growth forest
permanent study
plot
scots pine
strict protection
Opis:
Two fundamental demographic processes (tree recruitment and mortality) are analyzed for forest stands growing on permanent study plots located in strictly protected Scots pine−dominated, old−growth stands of Kampinos National Park (central Poland). The major implications of the observed demographic trends for the general shape of tree size distributions are determined, as well. During the past ca 30 years, in the stands sampled, there was a pronounced lack of balance between mortality and recruitment processes. Mortality rate was eight times higher than recruitment rate. Eventually, there was a net significant decline in population density, observed for all major tree species, including Scots pine, pedunculate oak, silver and downy birch, and black alder. As mortality processes affected mainly smaller trees, there was also a significant deterioration of the general demographic status of most important tree species. This effect was shown by the change of the overall shape of diameter distributions over the study period: from reverse J−shaped to flat curves running nearly parallel to X−axis. The values of recruitment rates were markedly lower, and the values of mortality rates – significantly higher, than analogous values characterizing comparable forests (e.g., those obtained for the natural stands of Białowieża National Park). Low recruitment rates, as obtained for Kampinos stands, suggest that presently, in the local, Scots pine−dominated, old−growth stands, the general conditions for forest regeneration and for maintaining a long−term demographic stability are unfavorable. Most probably, the regeneration of this type of forest has an episodic, ‘wave−like’ character and corresponds to the ‘catastrophic’ model, according to which the successful regeneration of current dominants (especially Scots pine, silver and downy birch, black alder) must be preceded by a stand−initiating (stand−replacing) disturbance, leading to total or partial, but heavy, destruction of the currently existing stand. At the moment, it would be difficult to predict, however, if and when such a disturbance will affect the stands under investigation. Thus, we predict that in the nearest future at least, the state of overall demographic unbalance will continue or even increase.
Źródło:
Sylwan; 2020, 164, 06; 443-453
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the Magnetic Water Treatment Mechanism
Autorzy:
Vaskina, Iryna
Roi, Ihor
Plyatsuk, Leonid
Vaskin, Roman
Yakhnenko, Olena
Powiązania:
https://bibliotekanauki.pl/articles/123611.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
wastewater
aqueous solutions
water isomer
magnetic induction
non-equilibrium system
librational fluctuation
Opis:
The main problem of widespread introduction of magnetic water treatment (MWT) in the processes of water and wastewater treatment is the lack of modern research aimed at studying the mechanisms of MWT effects, in particular the influence on the physicochemical properties of aqueous solutions. This study explains the effect of MWT taking into account the physical and chemical properties of aqueous solutions due to the presence of the quantum differences in water molecules. All of the MWT effects are related to the change in the physicochemical properties of aqueous solutions. It is due to the presence of two types of water molecule isomers and their librational oscillations. The result of MWT is a violation of the synchronism of para-isomers vibrations, with the subsequent destruction of ice-like structures due to the receiving of energy from collisions with other water molecules (ortho-isomers). One of the most important MWT effects includes the change in the nature and speed of the physicochemical processes in aqueous solutions by increasing the number of more physically and chemically active ortho-isomers. The MWT parameters specified in the work allow explaining the nature of most MWT effects and require developing the scientific and methodological principles for the implementation of the MWT process and mathematical modeling of the MWT process in the water and wastewater treatment. It can be used in the design of the MWT devices taking into account the constructive and mode parameters of MWT devices.
Źródło:
Journal of Ecological Engineering; 2020, 21, 2; 251-260
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O pewnej wersji twierdzenia o wielopasmowej magistrali w niestacjonarnej gospodarce Gale’a
On a certain version of the multilane turnpike theorem in Gale’s non-stationary economy
Autorzy:
Panek, Emil
Powiązania:
https://bibliotekanauki.pl/articles/965062.pdf
Data publikacji:
2019
Wydawca:
Główny Urząd Statystyczny
Tematy:
niestacjonarna gospodarka Gale’a
równowaga chwilowa von Neu-manna
magistrala wielopasmowa
gale’s non-stationary economy
von neumann’s temporary equilibrium
multilane turnpike
Opis:
W zdecydowanej większości prac poświęconych asymptotycznym (magistralnym) własnościom optymalnych procesów wzrostu w stacjonarnych gospodarkach typu Neumanna-Gale’a-Leontiefa obrazem geometrycznym magistrali jest pojedyncza półprosta, nazywana promieniem von Neumanna. Mimo że ani postulat stacjonarności, ani jednoznaczności magistrali produkcyjnej nie są zgodne z obserwacją realnych procesów gospodarczych, lista publikacji poświęconych efektowi magistrali w niestacjonarnych gospodarkach Neumanna-Gale’a-Leontiefa (ze zmienną technologią) oraz wieloma magistralami jest znacznie skromniejsza. Należą do nich w szczególności prace Panka (2017, 2018), w których pojedyncza magistrala produkcyjna w niestacjonarnej gospodarce Gale’a jest zastąpiona przez wiązkę magistrali (magistralę wielopasmową). Artykuł nawiązuje bezpośrednio do publikacji Panka (2019), prezentującej dwa twierdzenia o magistrali, przy założeniu, że w niestacjonarnej gospodarce Gale’a optymalna struktura produkcji w okresie t pozostaje optymalna także w przyszłości. Obecnie założenie to zostało znacznie osłabione.
In the vast majority of papers concerning asymptotic (main) properties of the optimal growth processes in Neumann-Gale-Leontief’s stationary economies, the geometric image of a turnpike is expressed by a single ray, called von Neumann’s ray. Even though neither the postulate of stationariness nor unambigiousness of a production turnpike are consistent with the observations of real economic processes, the list of papers devoted to the effect of a multilane turnpike in Neumann-Gale-Leontief’s non-stationary economies (with changing technology and multiple lanes) is much more modest. These works include mainly papers by Panek (2017, 2018), where the author replaces a single production turnpike in Gale’s non-stationary economy with a multilane turnpike. This paper draws directly upon the author’s earlier work (Panek, 2019), where two turnpike theorems were presented. Both of them were based on the assumption significantly weakened by this paper – that in Gale’s non-stationary economy the optimal production structure in period t remains optimal also in the future.
Źródło:
Przegląd Statystyczny; 2019, 66, 2; 142-156
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal growth processes in a non-stationary Gale economy with a multilane production turnpike
Autorzy:
Panek, Emil
Powiązania:
https://bibliotekanauki.pl/articles/557783.pdf
Data publikacji:
2019-06-28
Wydawca:
Uniwersytet Ekonomiczny w Poznaniu
Tematy:
non-stationary Gale’s economy
von Neumann’s temporary equilibrium
multi-lane turnpike
Opis:
The topic of the paper is relevant in the field of optimal growth theory and therefore might be seen as an intellectual underpinning for research and practice in the field of transition economies and sustainable long-time development as well. It refers to the papers Panek (2015a, 2018) devoted to asymptotic properties of optimal growth properties in the non-stationary Gale type economy with single and multi-lane turnpikes in which it was assumed that changing production technology converges in time with certain limits of technology. As far as the postulate of a non-stationary economy (here: technology change) is consistent with real processes, the hypothesis of the existence of some limiting technology may raise controversies and be difficult to verify. In the paper, referring to the above mentioned publications and Panek (2014), a Gale-type economy with changing technology, multi-lane turnpike and time-increasing production efficiency, with no assumption concerning the existence of a limit technology will be examined.
Źródło:
Economics and Business Review; 2019, 5 (19), 2
2392-1641
Pojawia się w:
Economics and Business Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niestacjonarna gospodarka Gale’a z graniczną technologią i wielopasmową magistralą produkcyjną. „Słaby”, „silny” i „bardzo silny” efekt magistrali
Non-Stationary Gale Economy with Limited Technology and Multilane Turnpike. ”Weak”, ”Strong” and ”Very Strong” Turnpike Theorem
Autorzy:
Panek, Emil
Powiązania:
https://bibliotekanauki.pl/articles/965045.pdf
Data publikacji:
2018
Wydawca:
Główny Urząd Statystyczny
Tematy:
niestacjonarna gospodarka Gale’a
równowaga chwilowa von Neumanna
wielopasmowa magistrala produkcyjna
non-stationary gale model
von neumann temporary equilibrium
multilane production turnpike
Opis:
W pracach Panek (2016a, 2016b) zaproponowano uogólnienie pojęcia magistrali w stacjonarnej gospodarce typu Gale’a poprzez zastąpienie pojedynczej magistrali (pojedynczego promienia v. Neumanna) przez zwartą wiązkę magistral, którą nazwano magistralą wielopasmową. Udowodniono w nich tzw. „słabą” wersję twierdzenia o wielopasmowej magistrali (a) w stacjonarnej gospodarce Gale’a ze stałą (niezmienną w czasie technologią produkcji) oraz (b) w niestacjonarnej gospodarce Gale’a z technologią zbieżną z czasem do pewnej technologii granicznej. W niniejszym artykule, w nawiązaniu do w/w prac, przy częściowo zmodyfikowanych założeniach przedstawiono – obok dowodu „słabego” twierdzenia – także dowód „silnego” oraz „bardzo silnego” twierdzenia o wielopasmowej magistrali w niestacjonarnej gospodarce z technologią zbieżną z czasem do pewnej technologii granicznej.
In the author’s previous papers (2016a, 2016b) the generalized concept of turnpike in the stationary Gale’s economy has been proposed – a single turnpike (single von Neumann’s ray) has been replaced with a compact bundle of turnpikes and it has been called multilane turnpike. It has been proven that the ”weak” turnpike theorem holds in (a) stationary Gale’s economy with fixed (unchangeable in time) production technology and in (b) non-stationary Gale’s economy with technology convergent with time to a limit technology. In this article, in reference to the aforementioned papers, alongside with the ”weak” turnpike theorem, the proof of the ”strong” and ”very strong” turnpike theorem has been presented for the partially modified assumptions in a non stationary economy with multilane turnpike and with technology convergent with time to a limit technology.
Źródło:
Przegląd Statystyczny; 2018, 65, 4; 373-393
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The phenomenon of gravitational repulsion in the cosmic medium
Autorzy:
Etkin, V. A.
Powiązania:
https://bibliotekanauki.pl/articles/1163538.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Universe
attraction and repulsive force
baryonic and non-baryonic matter
gravitational equilibrium
Opis:
On the basis of the thermodynamic theory of transfer and transformation of all forms of energy and of the principle of mass-energy equivalence is established a more general law of gravity, according to which in the non-baryonic matter there is a gravitational force of attraction and repulsion. This theory predicts the existence of gravitational equilibrium, strong and weak gravity, as well as the presence of huge free gravitational energy reserves with the possibility of its use. This makes unnecessary the introduction of dark energy as a hypothetical medium, causing the accelerated expansion of the Universe. The theory considers the occurrence of radiation capable baryonic matter as a result of the phase transition (condensation) non-baryonic matter during its compaction forces of gravity with the rise of the new degrees of freedom. She explains the presence of libration zones, phenomenon of stellar matter overflow in binary systems, the anomalies in the behavior of space probes, structuring processes in the Universe, collapse, flash "supernova" etc. The predictions of the theory are confirmed data of astronomical observations of recent years.
Źródło:
World Scientific News; 2018, 109; 167-179
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generalization of Onsager’s reciprocal relations
Autorzy:
Etkin, V. A.
Powiązania:
https://bibliotekanauki.pl/articles/1182820.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
consequences
differential reciprocal relations
generalization
non-equilibrium thermodynamics
substantiation
verification
Opis:
Shows, that it is possible to expand the existing theory of irreversible processes to processes of useful transformation of any forms of energy by a finding of motive forces and the speeds of real processes as derivative of energy, but not entropy; that for such processes there are differential reciprocal relations with Onsager’s symmetry and Cazimir’s anti-symmetry conditions resulting from them; that Maxwell’s equations follows from these correlation, confirming their equity for a wide class of processes, satisfying to these equations
Źródło:
World Scientific News; 2017, 64; 44-53
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Purification of the gas after pyrolysis in coupled plasma-catalytic system
Autorzy:
Młotek, M.
Ulejczyk, B.
Woroszył, J.
Walerczak, I.
Krawczyk, K.
Powiązania:
https://bibliotekanauki.pl/articles/778313.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
gliding discharge
non-equilibrium plasma
plasma-catalytic system
tar decompositio
Opis:
Gliding discharge and coupled plasma-catalytic system were used for toluene conversion in a gas composition such as the one obtained during pyrolysis of biomass. The chosen catalyst was G-0117, which is an industrial catalyst for methane conversion manufactured by INS Pulawy (Poland). The effects of discharge power, initial concentration of toluene, gas flow rate and the presence of the bed of the G-0117 catalyst on the conversion of C7 H8 , a model tars compounds were investigated. Conversion of coluene increases with discharge power and the highest one was noted in the coupled plasma-catalytic system. It was higher than that in the homogeneous system of gliding discharge. When applying a reactor with reduced G-0117 and CO (0.15 mol%), CO2  (0.15 mol%), H2  (0.30 mol%), N2  (0.40 mol%), 4000 ppm of toluene and gas flow rate of 1.5 Nm3 /h, the conversion of toluene was higher than 99%. In the coupled plasma-catalytic system with G-0117 methanation of carbon oxides was observed.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 4; 94-98
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 33

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