Catalytic effect of Fe2O3, Mn2O3, and TiO2 nanoparticles on thermal decomposition of potassium nitrate

Ravanbod, Mohsen; Pouretedal, Hamid Reza

doi:10.1007/s10973-015-5167-y

Cited by 21 publications

(12 citation statements)

References 31 publications

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“…For graphical calculations of KAS, OFW and CR methods were used the following formulas according to the literature. For KAS calculations equation 1 [20][21][22][23][24][25][26][27][28][29], for OFW equation 2 [22][23][24][25][26][27][28][29][30][31][32] and for CR equation 3 [31][32][33][34] 5.…”

Section: Methodsmentioning

confidence: 99%

The Thermal Investigation, Thermokinetic Analysis and Antimicrobial Activity of Two New Energetic Materials Obtained from Nucleophilic Substitution of Nitro Pyridine Ring

İnal

Acar

Sopacı

et al. 2018

Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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2-Chloro-3 and 5-dinitropyridine were put into reaction with hydrazine and 3-aminopyrazole to obtain two new highly nitrogenous energetic substances. These energetic substances are; N(3,5-dinitropyridyn-2-yl) hydrazine (I), and N(3,5dinitropyridyn-2-yl)3-aminopyrazole (II). These substances were characterized with element analysis, mass spectroscopy, IR spectroscopy, 1 HNMR and 13 CNMR methods. Besides, the substances were analyzed with TG and thermal decomposition mechanisms were interpreted. Apart from these, isothermal and thermal kinetic analysis methods were used to reveal out the activation energies and Arrhenius pre-exponential factors. Thermodynamic parameters of decomposition reactions were measured by using these values. Nitrofuroxane ring was concluded to be the sub-product in thermal decomposition reactions. Gaussian 09 software algorithms were used to measure the standard formation enthalpy values of the two energetic substances. Using these values, the reaction enthalpy value of the thermal decomposition reaction according to Hess's law and the result obtained was compared with the value obtained from the differential scanning calorimetry method. Experimental and theoretical results were observed to be similar. In addition to these, antimicrobial effects of the highly nitrogenous energetic substances were measured for 5 different bacteria and their antifungal effects were measured for one type of fungus. As they were highly nitrogenous, the bacteria were found to be using the nitrogen in these substances for nutritional purpose.

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Section: Methodsmentioning

confidence: 99%

The Thermal Investigation, Thermokinetic Analysis and Antimicrobial Activity of Two New Energetic Materials Obtained from Nucleophilic Substitution of Nitro Pyridine Ring

İnal

Acar

Sopacı

et al. 2018

Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…The preparation of Mn 2 O 3 (Mn(III) oxide) nanoparticles was based on our previously reported method [20]. Manganese(II) sulfate and oxalic acid solutions (both 0.05 mol·L −1 ) were mixed thoroughly by stirring at a constant temperature of 60 °C, followed by drop-wise addition of ammonia solution under continuous stirring until the solution pH reached 9.3.…”

Section: Synthesis Of Mn 2 O 3 Nanoparticles By Co-precipitation Methodsmentioning

confidence: 99%

“…On the other hand, the oxygen atoms in the nitrate anion (NO 3 − ) have unshared electron pairs, and thus behave as Lewis bases donating their unshared electron pairs to the empty valence orbitals of the metal cations of the oxide catalyst to form a surface complex. Formation of the M−O coordination bond weakens the O−N bond in the NO 3 − group and thereby facilitates the decomposition process of AN [20].…”

Section: Calculation Of the Activation Energy By Model-free Isoconvermentioning

confidence: 99%

The Catalytic Effect of Mn2O3 Nanoparticles on the Ignition Reaction of Pyrotechnic of Ammonium Nitrate(V)/Thiourea

Pouretedal

Ravanbod

2017

Cent. Eur. J. Energ. Mater.

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Abstract:The non-isothermal TG/DSC technique has been used to study the kinetic triplet and heat of ignition reaction of ammonium nitrate(V) (AN)/thiourea (TU) pyrotechnic in the presence of Mn2O3 catalyst nanoparticles under an argon atmosphere at different heating rates (5 K·min ). The activation energies for the ignition reaction of AN/TU were calculated using the non-isothermal isoconversional Kissinger-Akahira-Sunose (KAS) and Friedman equations for different conversion fraction (α) values in the range 0.1-0.9. The pre-exponential factor and kinetic model were determined by means of the compensation effect and the selected model was confirmed by a nonlinear fitting method. The average activation energies in the absence and presence of 5 wt.% Mn2O3 nanoparticles were 110.1 kJ·mol ). The evolved heat (ΔH) of ignition reaction in the presence of Mn2O3 was about 4 times that in the absence of the nano-sized Mn2O3.

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“…The heat released may lead to thermal decomposition of the inorganic nitrate(V) salts and produce oxygen as indicated in the general equations below [28][29][30][31][32]: (2) in which M is the cation, such as K, Ag, Na, NH 4 and Li. The oxygen release rate by the thermal decomposition of the inorganic nitrate(V) salts is not high and is generally accelerated by catalysts [28][29][30][31][32]. In other words, the nitrate(V) salts cannot initiate the ignition of DMAZ with WFNA or IRFNA by the oxygen release mechanism.…”

Section: Effect Of Inorganic Nitrate Salts On the Id Times Of Dmaz-irmentioning

confidence: 99%

Effect of Some Inorganic Nitrate Salts on the Ignition Delay Time of DMAZ-IRFNA and DMAZ-WFNA Bi-propellants

Pakdehi¹,

Shirzadi²

2018

Cent. Eur. J. Energ. Mater.

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Dimethylaminoethyl azide (DMAZ) is a good replacement for the hydrazine group in the space industry. However, it has a relatively long ignition delay time with the liquid oxidizer, white fuming nitric acid (WFNA), and is nonhypergolic with inhibited red fuming nitric acid (IRFNA). In this article, the ignition delay times of DMAZ-WFNA and DMAZ-IRFNA bi-propellants were reduced by the addition of some inorganic nitrate salts, such as NH4NO3, KNO3, NaNO3, AgNO3 and LiNO3, to the liquid oxidizers. The results showed that WFNA containing 0.1 wt.%, 0.3 wt.% and 0.5 wt.% of LiNO3 reduced the ignition delay time of DMAZ-WFNA from 88 ms to 18 ms, 14 ms and 8 ms, respectively. The same percentages of LiNO3 caused the nonhypergolic DMAZ-IRFNA bi-propellant to have ignition delay times of 42 ms, 34 ms and 22 ms, respectively. Moreover, calculations indicated that the addition of LiNO3 to both oxidizers did not have a significant affect on the specific impulse of the bi-propellants. Consequently LiNO3 could be an appropriate additive for the reduction of the ignition delay times of DMAZ-WFNA and DMAZ-IRFNA bi-propellants.

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Catalytic effect of Fe2O3, Mn2O3, and TiO2 nanoparticles on thermal decomposition of potassium nitrate

Cited by 21 publications

References 31 publications

The Thermal Investigation, Thermokinetic Analysis and Antimicrobial Activity of Two New Energetic Materials Obtained from Nucleophilic Substitution of Nitro Pyridine Ring

The Thermal Investigation, Thermokinetic Analysis and Antimicrobial Activity of Two New Energetic Materials Obtained from Nucleophilic Substitution of Nitro Pyridine Ring

The Catalytic Effect of Mn2O3 Nanoparticles on the Ignition Reaction of Pyrotechnic of Ammonium Nitrate(V)/Thiourea

Effect of Some Inorganic Nitrate Salts on the Ignition Delay Time of DMAZ-IRFNA and DMAZ-WFNA Bi-propellants

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