TY - JOUR

T1 - Comparative Study on Carbon Erosion of Nickel Alloys in the Presence of Organic Compounds under Various Reaction Conditions

AU - Volodin, Alexander M

AU - Kenzhin, Roman M

AU - Bauman, Yury I

AU - Afonnikova, Sofya D

AU - Potylitsyna, Arina R

AU - Shubin, Yury V

AU - Mishakov, Ilya V

AU - Vedyagin, Aleksey A

N1 - This study was funded by the Russian Science Foundation (grant number 22-13-00406, https://rscf.ru/en/project/22-13-00406/, BIC SB RAS).

PY - 2022/12/17

Y1 - 2022/12/17

N2 - The processes of carbon erosion of nickel alloys during the catalytic pyrolysis of organic compounds with the formation of carbon nanofibers in a flow-through reactor as well as under reaction conditions in a close volume (Reactions under Autogenic Pressure at Elevated Temperature, RAPET) were studied. The efficiency of the ferromagnetic resonance method to monitor the appearance of catalytically active nickel particles in these processes has been shown. As found, the interaction of bulk Ni-Cr alloy with the reaction medium containing halogenated hydrocarbons (1,2-dichloroethane, 1-iodobutane, 1-bromobutane) results in the appearance of ferromagnetic particles of similar dimensions (~200-300 nm). In the cases of hexachlorobenzene and hexafluorobenzene, the presence of a hydrogen source (hexamethylbenzene) in the reaction mixture was shown to be highly required. The microdispersed samples of Ni-Cu and Ni-Mo alloys were prepared by mechanochemical alloying of powders and by reductive thermolysis of salts-precursors, accordingly. Their interaction with polymers (polyethylene and polyvinyl chloride) under RAPET conditions and with ethylene and 1,2-dichloroethane in a flow-through reactor are comparatively studied as well. According to microscopic data, the morphology of the formed carbon nanofibers is affected by the alloy composition and by the nature of the used organic substrate.

AB - The processes of carbon erosion of nickel alloys during the catalytic pyrolysis of organic compounds with the formation of carbon nanofibers in a flow-through reactor as well as under reaction conditions in a close volume (Reactions under Autogenic Pressure at Elevated Temperature, RAPET) were studied. The efficiency of the ferromagnetic resonance method to monitor the appearance of catalytically active nickel particles in these processes has been shown. As found, the interaction of bulk Ni-Cr alloy with the reaction medium containing halogenated hydrocarbons (1,2-dichloroethane, 1-iodobutane, 1-bromobutane) results in the appearance of ferromagnetic particles of similar dimensions (~200-300 nm). In the cases of hexachlorobenzene and hexafluorobenzene, the presence of a hydrogen source (hexamethylbenzene) in the reaction mixture was shown to be highly required. The microdispersed samples of Ni-Cu and Ni-Mo alloys were prepared by mechanochemical alloying of powders and by reductive thermolysis of salts-precursors, accordingly. Their interaction with polymers (polyethylene and polyvinyl chloride) under RAPET conditions and with ethylene and 1,2-dichloroethane in a flow-through reactor are comparatively studied as well. According to microscopic data, the morphology of the formed carbon nanofibers is affected by the alloy composition and by the nature of the used organic substrate.

KW - RAPET

KW - carbon erosion

KW - carbon nanofibers

KW - ferromagnetic resonance

KW - nickel alloys

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85144610577&origin=inward&txGid=d737edd6af30cba2ecc8fc01a524335d

UR - https://www.mendeley.com/catalogue/51fc124d-3b52-311f-be53-2e81f603d25e/

U2 - 10.3390/ma15249033

DO - 10.3390/ma15249033

M3 - Article

C2 - 36556837

VL - 15

JO - Materials

JF - Materials

SN - 1996-1944

IS - 24

M1 - 9033

ER -