Effect of Carbon Nanotubes on the Catalysis of Propellant Combustion

Denisyuk, A. P.; Milekhin, Yu. M.; Demidova, L. A.; Sizov, Vladimir A.

doi:10.1134/s0012500818120078

Cited by 12 publications

(4 citation statements)

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“…Furthermore, it is revealed that the use of CNTs as a catalytic additive provides a better catalytic effect on the combustion of solid propellants compared to carbon black. Indeed, the catalyst combined with CNTs accelerated combustion by a factor of about 6.4, while the catalyst combined with carbon black accelerated the process twice [27] . Renpeng et al.…”

Section: Introductionmentioning

confidence: 99%

The effect of iron decorated MWCNTs and iron‐ionic liquid decorated MWCNTs onto thermal decomposition of ammonium perchlorate

Kechit

Belkhiri

Bhakta

et al. 2021

Zeitschrift anorg allge chemie

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In the present study, the effect of four nanocatalysts, namely, purified multi‐walled carbon nanotubes (MWCNTs), MWCNTs functionalized with ionic liquid (MWCNTs‐IL), MWCNTs decorated with iron nanoparticles (Fe‐MWCNTs) and the hybrid Fe‐MWCNTs‐IL on the thermal decomposition of ammonium perchlorate (AP) is highlighted. Firstly, MWCNTs are purified and impregnated under infrared irradiation followed by calcinations to obtain Fe‐MWCNTs. Secondly, a green ionic liquid (IL), based on choline chloride and urea is synthesized and used for the functionalization of MWCNTs and Fe‐MWCNTs to obtain MWCNTs‐IL and Fe‐MWCNTs‐IL, respectively. Subsequently, these nanomaterials at a ratio of 1 wt.% are introduced to AP to assess their catalytic effect using DSC and TG analyses. The obtained results highlight the catalytic effect of the functionalized MWCNTs on the thermal decomposition of AP for which a decrease in decomposition temperature of 10.7, 48.4 and 49.9 °C with an increase in decomposition enthalpy of 56.76, 689.99 and 861.11 J/g for AP supplemented with MWCNTs‐IL, Fe‐MWCNTs and Fe‐MWCNTs‐IL, respectively. Furthermore, the calculation of the kinetic parameters confirms that the best catalytic effect is obtained with the Fe‐MWCNTs‐IL hybrid, revealing the synergistic effect of iron and ionic liquid. This combination allows obtaining the lowest activation energy (∼120 kJ/mol).

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Section: Introductionmentioning

confidence: 99%

The effect of iron decorated MWCNTs and iron‐ionic liquid decorated MWCNTs onto thermal decomposition of ammonium perchlorate

Kechit

Belkhiri

Bhakta

et al. 2021

Zeitschrift anorg allge chemie

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“…For some nitro compounds, potassium dichromate, K 2 Cr 2 O 7 , was used for comparison with data of paper [29]. Carbon black UM‐76 with S sp =160–180 m 2 /g and carbon nanotubes Taunit‐MD (S sp =270 m 2 /g), which are more effective than various types of CB [20], were used as carbon materials. The catalysts were added to the explosives in excess of 100 %.…”

Section: Methodsmentioning

confidence: 99%

“…The possibility of formation of the carbon frame and its structure depend on composition of propellant and pressure at which combustion occurs. Thus, lead‐containing catalysts, both in individual form and in combination with copper‐containing additives, taken in amounts of 1–3 % do not affect the burning rate of propellants based on nitroglycerine (NG), including those containing RDX and HMX, without additional (cooling) plasticizers [9, 10, 15, 16, 20], since the carbon frame is not formed. The catalysis occurs only when catalysts are introduced together with CB.…”

Section: Introductionmentioning

confidence: 99%

Energetic Materials Combustion Catalysis: Necessary Conditions for Implementation

Denisyuk

Aung

Shepelev

2020

Propellants Explo Pyrotec

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The features of the catalysis of combustion of aromatic nitro compounds (trinitrates of toluene, resorcinol, phenol, etc.) have been studied. It has been shown that catalysts have a significant effect on the combustion of aromatic nitro compounds, and, as in the case of double-base propellants, their efficiency increases with the addition of carbon materials, especially carbon nanotubes (CNTs). For example, the addition of 3% nickel salicylate in combination with 1% CNTs to trinitroresorcinol leads to an increase in its burning rate by 4.3 times. It has been shown that, as in the case of double-base propellants, a necessary condition for the catalysis of nitro compounds is the formation of a carbon frame (deposit char layer) on the burning surface, on which catalyst particles accumulate and accelerate exothermic reactions. This fact, combined with the high thermal conductivity of the carbon frame, leads to an increase in the heat flux into the condensed phase and an increase in the burning rate. As pressure increases, the formation of the frame becomes more difficult, and the effect of catalysts decreases, as a result of which the value of pressure exponent reduces. The proposed mechanism of combustion catalysis is applicable to almost any individual explosives and propellant compositions based on various plasticizers (nitroesters, linear liquid nitro compounds and nitramines, etc.), as well as containing powerful explosives (RDX, HMX, CL-20, etc.), the combustion of which proceeds due to the heat of redox reactions.

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“…However, CNTs have a high thermal conductivity greater than soot, and a developed structure [29]. So, when the combustion of compositions containing CNTs occurs, a higher carbon frame is formed on combustion surface and covering a larger burning surface area, on which catalyst particles accumulated (much more than in the case of soot [24,25]). This increases the effective surface area of the catalyst particles, where intense heat is generated, leading to an increase burning rate.…”

Section: Effect Of the Soot And Cnts On The Catalytic Combustion Of S...mentioning

confidence: 99%

Influence of some additives on burning rate of KNO3-based compositions

Tuan,

A. P.,

Khai

et al. 2023

Vietnam J. Sci. Technol.

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In this article effect of some additives on combustion behaviour of high energetic compositions based on KNO3 was studied. The KNO3-based samples were made by mixing, rolling, and pressing. Investigated additives were: copper salicylate, nickel salicylate, copper-lead phthalate, nickel-lead phthalate, soot and carbon nanotubes. Burning rate was determined by the pressure increasing by using modification of the corner point method. It is shown that individual additives insignificantly effect on the burning rate of studied samples. The carbon nanotubes brand TMD with specific surface area ~270 m2/g and copper salicylate are the most effective additives on the burning rate. It should be noted that copper salicylate with carbon nanotubes have a significantly greater effect on the burning rate than individual additives or the catalyst with soot.

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Effect of Carbon Nanotubes on the Catalysis of Propellant Combustion

Cited by 12 publications

References 0 publications

The effect of iron decorated MWCNTs and iron‐ionic liquid decorated MWCNTs onto thermal decomposition of ammonium perchlorate

The effect of iron decorated MWCNTs and iron‐ionic liquid decorated MWCNTs onto thermal decomposition of ammonium perchlorate

Energetic Materials Combustion Catalysis: Necessary Conditions for Implementation

Influence of some additives on burning rate of KNO3-based compositions

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