Hydrogen production from alcohol solution by microwave discharge in liquid

Emission spectra and gas products of microwave discharge in liquid n‐heptane with and without argon bubbling (6–40 l h−1) are investigated. The discharge was excited in a system with a coaxial input of energy. The pressure above the surface of the liquid was equal to atmospheric pressure. It is shown that the addition of argon changes the spectral composition of the plasma radiation, in which the emission of hydrogen and argon atomic lines appears. The addition of argon does not affect the rotational and vibrational temperatures of the state C2true(d3normalΠgtrue), the composition and the ratio of the main gas products (H2, CH4, C2H2, C2H4).

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“…Some results on gaseous products of microwave discharges in liquid hydrocarbons are presented in refs. .…”

Section: Introductionmentioning

confidence: 99%

Microwave discharge in liquid n‐heptane with and without bubble flow of argon

Averin

Билера

Lebedev

et al. 2019

Plasma Processes & Polymers

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“…Currently the catalytic methane steam reforming process is the most well-developed technique for hydrogen production [6]. However, the relatively low specific productivity, large equipment size, and high temperature requirement (600-1000 K), as well as the rapid deactivation of catalysts in the reforming process, still limit its industrial applications, particularly in small-scale distributed and mobile systems where rapid ignition/response is essential [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Plasma activation of methane for hydrogen production in a N2 rotating gliding arc warm plasma: A chemical kinetics study

Zhang

Wang

et al. 2018

Chemical Engineering Journal

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In this work, a chemical kinetics study on methane activation for hydrogen production in a warm plasma, i.e., N 2 rotating gliding arc (RGA), was performed for the first time to get new insights into the underlying reaction mechanisms and pathways. A zero-dimensional chemical kinetics model was developed, which showed a good agreement with the experimental results in terms of the conversion of CH 4 and product selectivities, allowing us to get a better understanding of the relative significance of various important species and their related reactions to the formation and loss of CH 4 , H 2 , and C 2 H 2 etc. An overall reaction scheme was obtained to provide a realistic picture of the plasma chemistry. The results reveal that the electrons and excited nitrogen species (mainly N 2 (A)) play a dominant role in the initial dissociation of CH 4 . However, the H atom induced reaction CH 4 + H → CH 3 + H 2 , which has an enhanced reaction rate due to the high gas temperature (over 1200 K), is the major contributor to both the conversion of CH 4 and H 2 production, with its relative contributions of >90% and >85%, respectively, when only considering the forward reactions. The coexistence and interaction of thermochemical and plasma chemical processes in the rotating gliding arc warm plasma significantly enhance the process performance. The formation of C 2 hydrocarbons follows a nearly one-way path of C 2 H 6 → C 2 H 4 → C 2 H 2 , explaining why the selectivities of C 2 products decreased in the order of C 2 H 2 > C 2 H 4 > C 2 H 6 .

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“…MW discharge in liquids has been studied for water and aqueous solutions, n ‐dodecane, commercial cooking and mineral oils, wastes of cooking and mineral oil, organosilicon oil, alcohol solution, and n ‐heptane . Combined action of MWs and ultrasound waves has also been studied .…”

Section: Introductionmentioning

confidence: 99%

Nanosize carbon products formed in microwave discharge in liquid alkanes

Averin

Lebedev

Щеголихин

et al. 2017

Plasma Processes & Polymers

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Carbon‐containing nanosize solid‐state phase have been produced in the atmospheric pressure microwave (MW) plasma ignited in the gas bubbles in liquid alkanes CnH2n+2 (n = 7, 8, 10, 15, 16). Gas bubbles are generated by flow of argon. According to SEM data, the solid‐state products are represented by particles having dimensions in the range of 100–200 nm. Raman spectra of the sooty‐like unpurified solid products permit to categorize them as sp3+sp2 mixed forms of carbon comprising mainly an “damaged grapheme” along with a “few‐layer” graphite nanoparticles. NMR spectra of the solid products show strong aromatization and formation of various unsaturated molecular fragments. FTIR‐ATR spectra indicate that the carbonaceous nanoparticles are contaminated with minor amounts of different hydrocarbon residues and oxidized species.

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Hydrogen production from alcohol solution by microwave discharge in liquid

Cited by 53 publications

References 40 publications

Microwave discharge in liquid n‐heptane with and without bubble flow of argon

Microwave discharge in liquid n‐heptane with and without bubble flow of argon

Plasma activation of methane for hydrogen production in a N2 rotating gliding arc warm plasma: A chemical kinetics study

Nanosize carbon products formed in microwave discharge in liquid alkanes

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