Interaction of bulk nickel and nichrome with halogenated butanes

Kenzhin, Roman M.; Bauman, Yury I.; Volodin, Alexander M.; Mishakov, Ilya V.; Vedyagin, Aleksey A.

doi:10.1007/s11144-017-1273-0

Cited by 6 publications

(19 citation statements)

References 20 publications

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“…As it was reported earlier, self-disintegration of bulk metallic nickel and its alloys can be significantly facilitated when the reaction mixture contains both hydrogen and halogen sources [7,8]. In the case of organic compounds containing hydrogen or halogen only (for example, hexamethylbenzene or hexafluorobenzene) used as a carbon source, this process is rather complicated.…”

Section: Resultsmentioning

confidence: 90%

“…Moreover, at reaction temperatures of 500 °C and above the appearance of an intensive singlet g = 2.003 typical for various carbon materials becomes noticeable [7,8]. Figure 1a shows the micrographs of the nichrome sample after its interaction with polyethylene at temperature of 800 °C.…”

Section: Resultsmentioning

confidence: 99%

“…In order to examine this expectation, the ampules with reagents (piece of NiCr wire and polyethylene) were consecutively calcined at temperature from 400 to 800 °C with a step of 100 °C. For the resulted contents we have tried to apply ferromagnetic resonance (FMR) method as described in [5][6][7][8]. This method was shown to be an efficient tool for investigation of nickel-containing samples.…”

Section: Resultsmentioning

confidence: 99%

“…Experiments on polymer decomposition in a close volume were performed using quartz ampoules (d = 4-5 mm, V ~ 0.2 ml) as a reactor [7,8]. A piece of nichrome wire of about 0.2-0.3 mg was placed in an ampoule together with 2-3 mg of polymer (polyethylene, Teflon or polyvinylchloride).…”

Section: Methodsmentioning

confidence: 99%

“…The particles formed exhibit excellent activity in CNFs growth. In order to obtain possible solid-phase intermediates, we have performed experiments on detail studies of the mentioned interaction at elevated temperatures in closed volume (autoclave conditions), when the gaseous products withdrawal is practically absent [7,8]. A similar approach is well known in the literature to be successfully applied for the synthesis of various carbon and other inorganic materials [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Microscopic studies on the polymers decomposition in a closed volume at elevated temperatures in the presence of bulk NiCr alloy

et al. 2018

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In the present work, self-disintegration of the bulk metallic Ni-Cr alloy in the presence of different polymer compounds under the conditions of closed volume and elevated temperatures is studied. It was found that in the cases of polymers containing in addition to carbon only hydrogen atoms (polyethylene) or only halogen atoms (polytetrafluoroethylene), self-disintegration does not proceed noticeably even at temperatures as high as 800 °C. The predominating form of the solid product is non-catalytic carbon shaped as microspheres or their sintered agglomerates. On the contrary, for decomposition of the polymer containing hydrogen and halogen atoms (polyvinylchloride), self-dispersion of the bulk alloy is significantly facilitated. This process is accompanied with formation of catalytically derived forms of structured carbon within all the studied temperature range (500-800 °C). The most common form of the carbon deposits is nanofibers. At the same time, some unusual carbon structures were observed, among which the solid-phase carbon-nickel microcrystals of a regular cubic shape with pyramidal cavities on each facet are of special interest. The studied process can be considered as an alternative approach for utilization and recycling of the plastic wastes.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microscopic studies on the polymers decomposition in a closed volume at elevated temperatures in the presence of bulk NiCr alloy

et al. 2018

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CO _x ‐free catalytic decomposition of methane over solution combustion synthesis derived catalyst: Synthesis of hydrogen and carbon nanofibers

Kurmashov

Bannov

Попов

et al. 2022

Intl J of Energy Research

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Summary The catalyst for decomposition of methane to carbon nanofibers and hydrogen was prepared using the solution combustion technique. Dynamics of change of temperature of solution (gel) during the passing of redox reaction of synthesis of catalyst was found experimentally. Testing of catalyst was carried out in a flow through installation. Catalyst with high content of active component 90Ni‐10Al2O3 (wt%) was tested in a reaction of methane decomposition in a temperature range 535°С to 675°С and pressures 1 to 5 atm. The samples of carbon nanofibers were investigated by scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, and X‐ray diffraction. The optimal parameters of catalytic reaction (550°С, 3 atm) providing the high specific yield of hydrogen (287.7 mol/g) were established. The increase of pressure above 1 atm led to prolonged operation of the catalyst. The negative role of temperature rise on the yield of CNFs was found.

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Effect of potassium in catalysts obtained by the solution combustion synthesis for co-production of hydrogen and carbon nanofibers by catalytic decomposition of methane

Chudakova,

Popov,

Korovchenko

et al. 2024

Chemical Engineering Science

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Interaction of bulk nickel and nichrome with halogenated butanes

Cited by 6 publications

References 20 publications

Microscopic studies on the polymers decomposition in a closed volume at elevated temperatures in the presence of bulk NiCr alloy

Microscopic studies on the polymers decomposition in a closed volume at elevated temperatures in the presence of bulk NiCr alloy

CO _x ‐free catalytic decomposition of methane over solution combustion synthesis derived catalyst: Synthesis of hydrogen and carbon nanofibers

Effect of potassium in catalysts obtained by the solution combustion synthesis for co-production of hydrogen and carbon nanofibers by catalytic decomposition of methane

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Interaction of bulk nickel and nichrome with halogenated butanes

Cited by 6 publications

References 20 publications

Microscopic studies on the polymers decomposition in a closed volume at elevated temperatures in the presence of bulk NiCr alloy

Microscopic studies on the polymers decomposition in a closed volume at elevated temperatures in the presence of bulk NiCr alloy

CO x ‐free catalytic decomposition of methane over solution combustion synthesis derived catalyst: Synthesis of hydrogen and carbon nanofibers

Effect of potassium in catalysts obtained by the solution combustion synthesis for co-production of hydrogen and carbon nanofibers by catalytic decomposition of methane

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Product

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CO _x ‐free catalytic decomposition of methane over solution combustion synthesis derived catalyst: Synthesis of hydrogen and carbon nanofibers