Ethanol reforming into hydrogen-rich gas applying microwave ‘tornado’-type plasma

Цыганов, Д. Л.; Bundaleska, N.; Tatarova, E.; Ferreira, C. M.

doi:10.1016/j.ijhydene.2013.08.127

Cited by 40 publications

(38 citation statements)

References 45 publications

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“…It can be seen that the intensity of C 2 lines decrease with addition of hydrogen. In our previous work [34] the emission of excited carbon atoms at 247.9 nm at higher concentration of ethanol precursor was detected. However, decreasing the ethanol precursor in the mixture decreased the intensity of this line, and it is difficult separate from the background noise.…”

Section: Resultsmentioning

confidence: 85%

“…Under the above assumptions, the gas thermal balance equation can be written as [34] ( ) ( ) Figure 3. Scheme of the main processes in hot plasma and assembly zones.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…Given the fact that, under the conditions of interest, the main role of the electrons is to absorb microwave power and to transfer it to the heavy particles, we further assume δ = 0.9, which is a typical value for atmospheric pressure conditions, and ~10% energy in radiation and dielectric losses. The approach used has been validated in a series of extensive experimental and theoretical studies [34,[49][50][51][52][53][54].…”

Section: Theoretical Modelmentioning

confidence: 99%

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On the plasma-based growth of ‘flowing’ graphene sheets at atmospheric pressure conditions

Цыганов

Bundaleska

Tatarova

et al. 2015

Plasma Sources Sci. Technol.

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A theoretical and experimental study on atmospheric pressure microwave plasma-based assembly of free standing graphene sheets is presented. The synthesis method is based on introducing a carbon-containing precursor (C 2 H 5 OH) through a microwave (2.45 GHz) argon plasma environment, where decomposition of ethanol molecules takes place and carbon atoms and molecules are created and then converted into solid carbon nuclei in the 'colder' nucleation zones. A theoretical model previously developed has been further updated and refined to map the particle and thermal fluxes in the plasma reactor. Considering the nucleation process as a delicate interplay between thermodynamic and kinetic factors, the model is based on a set of non-linear differential equations describing plasma thermodynamics and chemical kinetics. The model predictions were validated by experimental results. Optical emission spectroscopy was applied to detect the plasma emission related to carbon species from the 'hot' plasma zone. Raman spectroscopy, scanning electron microscopy (SEM), and x-ray photoelectron spectroscopy (XPS) techniques have been applied to analyze the synthesized nanostructures. The microstructural features of the solid carbon nuclei collected from the colder zones of plasma reactor vary according to their location. A part of the solid carbon was deposited on the discharge tube wall. The solid assembled from the main stream, which was gradually withdrawn from the hot plasma region in the outlet plasma stream directed to a filter, was composed by 'flowing' graphene sheets. The influence of additional hydrogen, Ar flow rate and microwave power on the concentration of obtained stable species and carbon−dicarbon was evaluated. The ratio of sp 3 /sp 2 carbons in graphene sheets is presented. A correlation between changes in C 2 and C number densities and sp 3 /sp 2 ratio was found.

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Section: Resultsmentioning

confidence: 85%

“…Under the above assumptions, the gas thermal balance equation can be written as [34] ( ) ( ) Figure 3. Scheme of the main processes in hot plasma and assembly zones.…”

Section: Theoretical Modelmentioning

confidence: 99%

Section: Theoretical Modelmentioning

confidence: 99%

See 1 more Smart Citation

On the plasma-based growth of ‘flowing’ graphene sheets at atmospheric pressure conditions

Цыганов

Bundaleska

Tatarova

et al. 2015

Plasma Sources Sci. Technol.

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“…The biomass heating in microwave plasma reactor is not an instant process because it results due to convective and radiative heat transfer between argon plasma and biomass particles. The characteristic temperatures and the biomass heating rate in microwave Ar plasma environment are rather high: 3000–3500 K and ∼300 000 K s −1 , respectively. The characteristic residence time of the biomass particle in the Ar plasma environment up to the cooling point, which is taken at the end of the discharge column, is

t = \frac{T_{0}}{V_{0}} \int_{0}^{Z_{e n d}} \frac{d normalz}{T false(normalz false)}

∼0.5 s, where

V_{0}

is the gas velocity at initial temperature

T_{0}

;

T (z)

is the gas temperature profile along the discharge .…”

Section: Model Descriptionmentioning

confidence: 99%

“…In the present study, the theoretical model developed and presented in ref . has been further elaborated to describe biomass particles pyrolysis in a microwave plasma operating at atmospheric pressure conditions.…”

Section: Introductionmentioning

confidence: 99%

Modeling of a Microwave Plasma Driven Biomass Pyrolitic Conversion for Energy Production

Цыганов

Bundaleska

Tatarova

2016

Plasma Processes & Polymers

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The thermal decomposition of biomass particles in a microwave plasma operating at atmospheric pressure conditions has been theoretically investigated. The set of equations, including thermal balance equations for the gas and biomass particles and kinetic rate balance equations for stable and intermediate components of biomass decomposition was solved for two different assumptions: thermal equilibrium and non‐equilibrium. The thermal equilibrium assumption is acceptable given the high temperature and high reaction rates achievable in the microwave plasma environment, and although it hides the evolution of the pyrolysis process, it allows the description of the detailed chemical composition of the stable pyrolysis by‐products (H2, CO, C2H2, and C [solid]).

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Plasma for Ethanol Reforming

Yan

Du²

2017

Hydrogen Generation From Ethanol Using Plasma Reforming Technology

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Ethanol reforming into hydrogen-rich gas applying microwave ‘tornado’-type plasma

Cited by 40 publications

References 45 publications

On the plasma-based growth of ‘flowing’ graphene sheets at atmospheric pressure conditions

On the plasma-based growth of ‘flowing’ graphene sheets at atmospheric pressure conditions

Modeling of a Microwave Plasma Driven Biomass Pyrolitic Conversion for Energy Production

Plasma for Ethanol Reforming

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