Radiation-induced synthesis of branched liquid alkanes

Makarov, Igor; Пономарев, А. В.; Ершов, Б. Г.

doi:10.1134/s0018143907020014

Cited by 3 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…in the experiment, one of the main products was ethylene, and in the calculations-ethane. Also in experiments with continuous electron beam [41][42][43][44] one of the main products was ethane, and the concentration of obtained hydrogen was approximately ten times lower than in our experiments. The divergence can be explained by the fact that some mechanisms of conversion of saturated hydrocarbons into unsaturated ones, which play the significant role in the non-equilibrium plasma formed by pulsed electron beam were not taken into account in the model.…”

Section: Discussioncontrasting

confidence: 66%

“…However, existing electron-beam methods, as discharge ones, require significant heating of the processed gas mixture. Partially the problem has solved in experiments on irradiation of alkanes mixtures by continuous 500 keV electron beam [41][42][43][44]. In the experiments effective methane conversion to higher hydrocarbons, alcohols, ethers etc at an initial temperature 303 K was carried out.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Plasma chemical conversion of methane by pulsed electron beams and non-self-sustained discharges

Kuznetsov¹,

Uvarin²,

Filatov³

2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Investigations of methane conversion in atmospheric-pressure mixtures of various composition and temperature, irradiated by pulsed nanosecond electron beams and non-self-sustained discharges initiated by electron beams, were carried out. It was shown that during direct conversion at room temperature, the energy cost of the conversion of one CH 4 molecule (5.6 eV molecule −1 ) was commensurate with that obtained in the experiments with the use of continuous electron beam. The main products of direct conversion were hydrogen and ethylene. If a small amount of oxygen was present in the mixture, methanol was added to the conversion products, which in turn decomposed into CO, CO 2 and H 2 O. The results of numerical simulations and experiments were basically the same. The use of a non-self-sustained discharge increased the degree of direct conversion of methane, but the energy cost of conversion also increased. The main products of carbon dioxide conversion of CH 4 (dry reforming) under the action of pulsed electron beam at room temperature were CO, H 2 , C 2 H 6 , and carbon. Energy cost of conversion (12 eV molecule −1 ) was about two times higher than in the case of direct conversion of methane. However, the use of pulsed electron beam for dry reforming turned out to be energetically more efficient than the use of the most types of discharges. The main products of CH 4 oxidative conversion by pulsed electron beam were H 2 , C 2 H 6 , and C 2 H 4 . At room temperature, the energy cost of methane conversion without a catalyst was 9 eV molecule −1 , whereas the use of Ni catalyst resulted in a seven-fold increase, and the use of NaOH/CaO one-in a 14-fold increase in the conversion efficiency compared to irradiation without a catalyst. When the temperature of the catalysts rised to 623 K, the conversion efficiency increased by another four times. The processes in electron-beam plasma that provide the implementation of the main mechanisms of methane conversion are also discussed in the paper.

show abstract

Section: Discussioncontrasting

confidence: 66%