An effective method to embed catalyst on AP and its effect on the burn rates of aluminized composite solid propellants

Marothiya, Gaurav; Vijay, Chaitanya; Ishitha, Kumar; Ramakrishna, P. A.

doi:10.1016/j.combustflame.2017.04.010

Cited by 39 publications

(12 citation statements)

References 12 publications

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“…The effects of CL-20 and RDX on basic properties of CMDB propellants were investigated, the major findings could be summarized as follows: 1) The calculations on energetic properties for CL-20/RDX-CMDB propellants showed that energetic properties of propellant with CL-20 were superior to of propellant with RDX. 2) The data on burning rate revealed that with the increase of RDX/CL-20 mass fraction in the propellants, the burning rates at low pressure (2-8 MPa) remained almost the same but differ observably at high pressure (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22). With the increase of CL-20 mass fraction in the propellants, the burning rates of propellants could be enhanced significantly, but the burning rates of propellants containing RDX decreased.…”

Section: Resultsmentioning

confidence: 97%

“…Joseph Kalman et al [17] investigated the effect of CL-20 particle size on the combustion of CL-20/HTPB propellants down to submicrometer sizes, the burning rate and combustion mechanism were discussed in detail. A large number of papers have been concerned with the combustion and energetic properties of HTPB and NEPE propellants [18][19][20][21][22][23][24]. However, there are very few publications on the effect of CL-20 particles on the combustion and energetic properties of composite modified double-base propellants (CMDB) [25][26][27], especially on its combustion residues properties.…”

Section: Introductionmentioning

confidence: 99%

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Study on Comparative Performance of CL‐20/RDX‐based CMDB Propellants

Yang

Zheng

Zhang

2019

Propellants Explo Pyrotec

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The energy, combustion and combustion residues properties of composite modified double‐base (CMDB)propellants with CL‐20 were compared to those propellants with RDX. The energy characteristic of CL‐20/RDX‐CMDB propellants had also been calculated theoretically based on the principle of minimum free energy. The energy property of propellants with CL‐20 was found to be evidently enhanced in comparison to those propellants containing RDX. The findings on combustion properties revealed that the combustion properties of CL‐20‐CMDB propellants were contrary to the of RDX‐CMDB propellants. With the mass fraction of CL‐20 increasing in the propellants, the burning rates of propellants can be enhanced significantly, but the burning rates of propellants containing RDX decreased. Analysis of the combustion residues for CL‐20/RDX‐CMDB propellants revealed that the C, Cu and Pb elements aggregated on combustion surface, which may be useful for guiding the regulation of combustion performance of high‐performance CMDB propellants containing CL‐20.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Study on Comparative Performance of CL‐20/RDX‐based CMDB Propellants

Yang

Zheng

Zhang

2019

Propellants Explo Pyrotec

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“…Marothiya et al [23] conducted strand burner experiments with AP pellets comparing the effects of mechanically mixed and embedded catalysts. The embedding process consisted of dissolving the AP in water, filtering out any impurities, mixing in the appropriate amount of catalyst, and evaporating the water out slowly, which resulted in catalyst-embedded AP.…”

Section: Ap Pellet With Additive Studiesmentioning

confidence: 99%

Burning Rate Characterization of Ammonium Perchlorate Pellets Containing Micro- and Nano-Catalytic Additives

Rodriguez

Thomas

Sammet

et al. 2022

Journal of Propulsion and Power

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Ammonium perchlorate (AP) is an extensively used oxidizer in solid composite propellants, and its combustion behavior can be tailored by the presence of catalytic additives such as metal oxides. Nano-sized metal oxide catalysts have been utilized in place of their micro-sized counterparts to tailor burning rates of composite Ammonium Perchlorate (AP)/Hydroxyl-terminate Polybutadiene (HTPB) propellants. The effects of micro-and nano-sized metal oxide catalysts on the combustion of AP were investigated and thoroughly characterized herein.AP pellets were manufactured with micro-and nano-iron oxide (Fe2O3) and micro-and nano-titanium oxide (TiO2) at several mass loadings (0-3% by mass) and were burned from 3.45-34.5 MPa (500-5,000 psi) in a constant-volume strand bomb.Intimate contact between the AP and micro-or nano-catalysts was ensured using a Resonant Acoustic Mixer (RAM). The homogenous mixture of AP and catalyst was pressed into pellets using a Carver hydraulic press. The sides of the pellets were inhibited prior to burning to discourage side-wall burning.The incorporation of 1% µFe2O3 yielded the highest burning rate among all formulations herein within the investigated pressure range. The incorporation of nTiO2 and nFe2O3 yielded burning rates which were independent of mass loading within the range of evaluated conditions (0.25-1%). All micro-formulations investigated increase the burning rate at pressures ranging from roughly 13. 500 psi) and 4.50-8.60 MPa (650-1,250 psi) and for µTiO2 and µFe2O3, respectively; and these viii

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“…Ammonium perchlorate (AP) was the commonest oxidant used in hydroxyl-terminated polybutadiene (HTPB)-based solid propellants owing to its high oxygen content, higher formation enthalpy, and ease of availability. [1][2][3] Thus improving the exothermic decomposition efficiency of AP was of significant meaning to obtaining solid propellants with excellent combustion performance. [4,5] Combustion catalysts were indispensable functional components in the formulation of solid propellants.…”

Section: Introductionmentioning

confidence: 99%

New Insights into the Catalytic Decomposition of Ammonium Perchlorate and Decomposition Mechanism by Nano‐CuO Dispersed in Graphite‐Carbon Nitride Nanosheet Composites

Shi

Chang-sheng

et al. 2022

ChemNanoMat

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Enhancing the exothermic decomposition of ammonium perchlorate (AP) is of great significance to obtain solid propellants with excellent combustion performance. Herein, we prepared a series of composites for catalyzing the exothermic decomposition of AP by a facile method with different masses of nano copper oxide (n-CuO) dispersed in graphene-nitride carbon (g-C 3 N 4 ) nanosheets. Among them, n-CuO-8/g-C 3 N 4 showed the best catalytic activity, which reduced the high-temperature decomposition (HTD) value by 95.0 °C, and increased the total heat release by 505 J • g À 1 . The n-CuO-12/g-C 3 N 4 also reduced the activation energy (E a ) of the HTD stage by 47.34 kJ • mol À 1 . The catalytic mechanism study suggested that the n-CuO-X/g-C 3 N 4 composites promoted the transition of electrons (e À ) and holes (h + ) from ClO 4À to NH 4 + and inhibited the recombination of e À and h + , which further enhanced the exothermic decomposition of AP. During decomposition, the transformation of N 2 O to NO was significantly inhibited by the n-CuO-X/g-C 3 N 4 composites, thus increasing the integral heat release as evidenced by Real-time thermogravimetry/Fourier transform infrared spectroscopy. This study illustrated that n-CuO-X/g-C 3 N 4 composites are catalysts for the efficient decomposition of AP, which further enhance the energy performance of solid propellants.

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An effective method to embed catalyst on AP and its effect on the burn rates of aluminized composite solid propellants

Cited by 39 publications

References 12 publications

Study on Comparative Performance of CL‐20/RDX‐based CMDB Propellants

Study on Comparative Performance of CL‐20/RDX‐based CMDB Propellants

Burning Rate Characterization of Ammonium Perchlorate Pellets Containing Micro- and Nano-Catalytic Additives

New Insights into the Catalytic Decomposition of Ammonium Perchlorate and Decomposition Mechanism by Nano‐CuO Dispersed in Graphite‐Carbon Nitride Nanosheet Composites

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