Synthesis and Study of Nanodispersed Carbon in the Combustion of Acetylene in a Flow Detonation Tube

Shaitanov, A. G.; Surovikin, Yu. V.; Rezanov, I. V.; Штерцер, А. А.; Ul’yanitskii, V. Yu.; Васильев, А. А.; Лихолобов, В. А.

doi:10.1134/s1070427218120121

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…The additives used in [ 18 ] were TiO 2 (brand R-FC5), SiO 2 (Rosil-175 silica filter) and technical SiC powders with an average particle size of 180 nm, 17 nm and 10 μm, respectively. In this work, we used as an additive nanoscale detonation carbon (NDC) whose production method and properties are described in [ 33 , 34 , 35 ]. NDC is the product of the decomposition of acetylene as a result of the detonation of the acetylene–oxygen mixture C 2 H 2 + k O 2 with a low oxygen content ( k < 1).…”

Section: Methodsmentioning

confidence: 99%

Cyclic Impact Compaction of an Ultra High Molecular Weight Polyethylene (UHMWPE) Powder and Properties of the Compacts

et al. 2022

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Experiments on Cyclic Impact Compaction (CIC) of UHMWPE powder GUR 4120 were carried out on a laboratory hydro-pneumatic impact device. This device provides impact energies of up to 1 kJ with a frequency of impacts of 9 s−1 and enables producing dense and robust compacts in the form of disks with a diameter of up to 60 mm and a height of up to 24 mm. The optimal parameters of the CIC were determined, which are the preheating temperature of the powder, the impact energy and the number of impacts. The strength, Brinell hardness and elongation of the resulting compacts with a diameter of 40 mm and a height of 15 mm were 37.5 MPa, 49.0 MPa and 470%, respectively. The possibility of activating UHMWPE powder by explosive loading was studied. It was found that the explosive pretreatment reduces the mechanical properties of the resultant compacts. The CIC method is suitable for the manufacture of UHMWPE-based composites with nano-additives, as evidenced by the successful production of compacts containing nanoscale detonation carbon as an additive. The results of the present study show that the CIC method is promising for the industrial production of small-sized UHMWPE parts.

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Section: Methodsmentioning

confidence: 99%

Cyclic Impact Compaction of an Ultra High Molecular Weight Polyethylene (UHMWPE) Powder and Properties of the Compacts

et al. 2022

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“…The formation of PAHs is only the first step in the formation of carbon dust grains. The study of dust formation has roots in the study of the practically significant process of carbon black formation . Currently, it is generally accepted that the process of carbon black or soot formation during the pyrolysis of hydrocarbon feedstock includes dehydrogenation, pyrolysis, cracking, and aromatization.…”

Section: Formation Of Carbon Nanoparticles and Grainsmentioning

confidence: 99%

“…The study of dust formation has roots in the study of the practically significant process of carbon black formation. 413 Currently, it is generally accepted that the process of carbon black or soot formation during the pyrolysis of hydrocarbon feedstock includes dehydrogenation, pyrolysis, cracking, and aromatization. An important role is played by the intermediate formation of acetylene, which occurs in flames by pyrolysis of organic fuels at sufficiently high temperatures.…”

Section: Formation Of Carbon Nanoparticles and Grainsmentioning

confidence: 99%

Role of Acetylene in the Chemical Evolution of Carbon Complexity

Pentsak,

Murga,

Ananikov

2024

ACS Earth Space Chem.

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Acetylene, among the multitude of organic molecules discovered in space, plays a distinct role in the genesis of organic matter. Characterized by its unique balance of stability and reactivity, acetylene is the simplest unsaturated organic molecule known to have a triple bond. In addition to its inherent chemical properties, acetylene is one of the most prevalent organic molecules found across the Universe, spanning from the icy surfaces of planets and satellites and the cold interstellar medium with low temperatures to hot circumstellar envelopes where temperatures surge to several thousand kelvins. These factors collectively position acetylene as a crucial building block in the molecular diversification of organic molecules and solids present in space. This review comprehensively discusses the formation and expansion of carbon skeletons involving acetylene, ranging from the formation of simple molecules to the origination of the first aromatic ring and ultimately to the formation of nanosized carbon particles. Mechanisms pertinent to both hot environments, such as circumstellar envelopes, and cold environments, including molecular clouds and planetary atmospheres, are explored. In addition, this review contemplates the role of acetylene in the synthesis of prebiotic molecules. A distinct focus is accorded to the recent advancements and future prospects of research into catalytic processes involving acetylene molecules, which is a significant instrument in driving the evolution of carbon complexity in the Universe. The insights garnered from this review underscore the significance of acetylene in astrochemistry and potentially contribute to our understanding of the chemical evolution of the Universe.

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“…С помощью детонации переобогащенных ацетиленокислородных смесей в [5; 6] получен конденсат углерода с различной морфологией частиц, зависящей от соотношения компонентов в смеси. Для его идентификации и сопоставления с другими формами углеродных материалов в [7] предложено использовать название «детонационный нанодисперсный углеродный материал» (ДНУМ). При изучении физико-химических свойств ДНУМ полезна информация об условиях (давлении и температуре), при которых он формируется за фронтом детонационной волны.…”

Section: Introductionunclassified

Melting Point of Carbon Particles behind the Gas Detonation Front

Prokhorov

2022

jour

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A mathematical model of gas detonation of fuel-enriched mixtures of hydrocarbons with oxygen has been formulated, which makes it possible to numerically study the equilibrium flows of detonation products in the presence of free carbon condensation. Reference data for graphite were used to describe the thermodynamic properties of carbon condensate. The calculations are compared with the known results of experimental studies in which, when detonating an acetylene-oxygen mixture in a pipe closed at one end, it is possible to obtain nanoscale particles from a carbon material with special properties. It is assumed that the melting point of such a material is lower than that of graphite and is about 3100 K. Only with such an adjustment of the melting temperature, the best agreement (with an accuracy of about 3 %) was obtained between the calculated and experimental dependence of the detonation front velocity on the molar fraction of acetylene in the mixture.

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Synthesis and Study of Nanodispersed Carbon in the Combustion of Acetylene in a Flow Detonation Tube

Cited by 4 publications

References 5 publications

Cyclic Impact Compaction of an Ultra High Molecular Weight Polyethylene (UHMWPE) Powder and Properties of the Compacts

Cyclic Impact Compaction of an Ultra High Molecular Weight Polyethylene (UHMWPE) Powder and Properties of the Compacts

Role of Acetylene in the Chemical Evolution of Carbon Complexity

Melting Point of Carbon Particles behind the Gas Detonation Front

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