Determination of Performance Parameters

2021 ◽  
pp. 145-160
Author(s):  
Ajoy K. Bose
Keyword(s):  
Performance Parameters

scholarly journals Experimental and Theoretical Study on Three Combustion Models for the Determination of the Performance Parameters of Nitrocellulose - Based Propellants

2020 ◽  
Vol 71 (9) ◽  
pp. 87-97
Author(s):  
Titi Paraschiv ◽  
Tudor Viorel Tiganescu ◽  
George Ovidiu Iorga ◽  
Raluca Elena Ginghina ◽  
Octavian Constantin Grigoroiu
Keyword(s):  
Chemical Composition ◽  
Energetic Materials ◽  
Specific Volume ◽  
Flame Temperature ◽  
Performance Parameters ◽  
Heat Of Explosion ◽  
Combustion Gases ◽  
Combustion Models ◽  
Double Base

Nitrocellulose based propellants are the main materials used for ballistic and rocket applications. The chemical composition of the propellants, the loading density and propellant grain geometry are the decisive parameters that influence the performance parameters in ballistic application. In this paper the authors evaluate three models of combustion for energetic materials for the determination of heat of explosion and specific volume together with the adiabatic flame temperature. The authors select six types of propellant (two simple base propellants, two double base propellants based on nitroglycerine and two triple base propellants based on nitroguanidine) and the authors determined the heat of explosion and specific volume using a bomb calorimeter and a Julius-Peters device. The results obtained from the combustion models were compared to the experimental results and assumptions were done on the influence of pressure and temperature on the chemical composition of combustion gases produced by the confined deflagration of nitrocellulose-based propellants.

scholarly journals Determination of phosphorus in different types of waste using the ICP-MS technique

2020 ◽  
Vol 2 (2) ◽  
pp. 138-144
Author(s):  
Gina Alina Catrina ◽  
◽  
Lidia Kim ◽  
Agnes Serbanescu ◽  
Ionut Cristea ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
Colorimetric Method ◽  
Vegetable Waste ◽  
Performance Parameters ◽  
Meat Processing ◽  
Icp Ms ◽  
Different Types ◽  
Plasma Mass Spectrometry ◽  
Phosphorous Concentration

The research aimed to provide an optimized method for the determination of phosphorous concentration in different types of solid waste using inductive coupled plasma mass spectrometry (ICP-MS) technique. The analyzed waste matrices are: a) vegetable waste (P1), b) ash from the incineration of medical waste (P2) c) sewage sludge (P3) and d) sludge from the meat processing industry (P4). The results obtained by the ICP-MS method were compared with the UV-VIS spectrophotometric method for the determination of total phosphorus. In the case of using the colorimetric method by UV-VIS technique, lower results were obtained compared to the ICP-MS method due to the interferences given by the reagents used to determine the total phosphorus. The interferences given by other elements (metals) were also investigated and the performance parameters were determined such as detection limit, quantification limit, recovery and expandend incertainty using ICP-MS technique.

The Preparation of Lithium Ion Sieve and Determination of its Adsorption Performance Parameters

2013 ◽  
Vol 706-708 ◽  
pp. 353-356
Author(s):  
Jiu Chen Jia ◽  
Li Fang Chen ◽  
Yong Xin Qi ◽  
Xiao Dong Luan ◽  
Hua Wen Wang ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Adsorption Capacity ◽  
Loss Rate ◽  
Lithium Ion ◽  
Performance Parameters ◽  
Adsorption Experiment ◽  
Adsorption Time ◽  
Adsorption Performance ◽  
Equilibrium Adsorption Capacity

This paper chose LiMn2O4 as ion-sieve. In the ion-sieve precursor pickling experiment, the elution effects of hydrochloride, nitric acid and sulfate were compared and hydrochloride was proved the suitable eluent. By changing the acidity of pickling time, the lithium evacuation rate and the manganese solution loss rate basically achieved balance after pickling for 5 h. The static adsorption experiment suggested that when the pH was 12.5 and adsorption time was 30 h, the equilibrium adsorption capacity was 19.71 mg/g.

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