Kinetic Study of Nonequilibrium Plasma-Assisted Methane Steam Reforming

Zheng, Hongtao; Liu, Qian

doi:10.1155/2014/938618

Cited by 5 publications

(2 citation statements)

References 20 publications

(22 reference statements)

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“…Considering the limited number density of ions occurring in the discharge plasma due to the relatively low electron energy in the RGA plasma (a mean electron temperature of around 1 eV), the ion involved heavy particle reactions were not included in the simulation, which is in consistent with other works [38,42,43]. In addition, the three-body collisions are considered to be negligible and were not taken into account [10,38,44].…”

Section: Heavy Particle Reactionsmentioning

confidence: 98%

“…A more detailed description of the 0-D model is available in the literature [37,38] and in the Supplementary Material. The average electron density was assumed to be constant in the simulation of each case and the similar method has been used by Kozák et al in the modeling of CO 2 conversion by a microwave discharge system [36].…”

Section: Description Of the Model 21 Chemical Kinetics Modelmentioning

confidence: 99%

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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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