DOI: 10.1016/j.ast.2019.105474 Corpus ID: 208844697; Simplified numerical simulation model for hydroxyl ammonium nitrate-based monopropellant rocket engines @article{Sun2019SimplifiedNS, title={Simplified numerical simulation model for hydroxyl ammonium nitrate-based monopropellant rocket engines}, author={De-chuan Sun and Wei …
An on-line source-tagged model coupled with an air quality model (Nested Air Quality Prediction Model System, NAQPMS) was applied to estimate source contributions of primary and secondary sulfate, nitrate and ammonium (S N A) during a representative winter period in Shanghai. This source-tagged model system could simultaneously track spatial and …
As the second (after urea) major nitrogen (N) fertilizer worldwide with an annual yield of ∼16 million tons, ammonium nitrate (AN, i.e. NH 4 NO 3) is an important chemical in human society [1].In addition to its effectiveness in the agricultural industry, AN can also be used for blasting the rocks, quarrying, mining, and civil construction [2].It has been widely applied as …
The kinetic triplets consist of the activation energy, pre-exponential factor, and the function describing the reaction mechanism. For the non-isothermal experiments conducted at a constant heating rate in this study, the methods of kinetic analysis include model-free method and model-fitting method (Jiang et al., 2015).The methods of obtaining the kinetic parameters …
The first experiments with nitrate- and ammonium-only tested the model against data from two single-N experiments, and showed that, in the absence of starvation or multiple N sources, observed trajectories are well characterized by the model: residual variation was small compared to the mean and symmetrically distributed around zero (Fig. 2 ...
International Journal of Environmental Research and Public Health Article A Sediment Diagenesis Model of Seasonal Nitrate and Ammonium Flux Spatial Variation Contributing to Eutrophication at Taihu, China Linda Sarpong 1,2, Yiping Li 2, *, Eyram Norgbey 1,2, Amechi S. Nwankwegu 1,2, Yue Cheng 1,2, Salifu Nasiru 3, Isaac Kwesi Nooni 4,5 and ...
Once ammonium nitrate becomes molten (particularly if confined) the risk of an explosion increases. This risk increases dramatically if the pH of molten ammonium nitrate falls or if it comes into contact with oxidisable material for instance organics such as oil, diesel, paper, rag, or straw. Ammonium nitrate may explode due to the following ...
Typically, the nitrogen form status regarding ammonium and nitrate is categorized into five groups in related studies as well as in most retrieved studies, including pure ammonium nitrogen, pure nitrate nitrogen, an equal proportion mixture of ammonium nitrate, a mixture with ammonium dominance (with the ANR mostly fixed at 75:25, with a few ...
The utility model discloses an ammonium nitrate crusher. A feeding hole of a shell is larger than a discharge opening thereof; two ends of a driving shaft and a driven shaft are respectively supported on corresponding side walls of the shell; one end of the driving shaft is connected with a motor through a reducer; a driving gear at the other end of the driving shaft is meshed with a …
This paper presents the first combined measurements of both ammonium nitrate aerosols and their gaseous precursors (HNO 3, NH 3) in the Paris megacity, obtained during the FRANCIPOL and PARTICULES campaigns.This data set is used to investigate the nitrate formation regime within the city, which is particularly important considering the high …
A detailed reaction mechanism for the liquid-phase decomposition of ammonium nitrate (AN) was modeled based on ab initio calculations, and this model was employed to simulate heat flow curves associated with the decomposition of AN at various heating rates (1, 2, 4, 5, and 8 K min−1) over the temperature range of 443–623 K. A kinetic analysis using the …
8.3 Ammonium Nitrate 8.3.1 General1-3 Ammonium nitrate (NH4NO3) is produced by neutralizing nitric acid (HNO3) with ammonia (NH3). In 1991, there were 58 U. S. ammonium nitrate plants located in 22 states producing about 8.2 million megagrams (Mg) (9 million tons) of ammonium nitrate. Approximately 15 to 20 percent of
In this study, the effect of the hydrolysis of N 2 O 5 on nitrate (NO 3 −) and ammonium (NH 4 +) in Beijing, China is studied.Although Beijing locates in the middle latitude (39.9°N) of the Northern hemisphere, these above conditions, which are favorable for the hydrolysis of N 2 O 5, are often occurred during high aerosol pollution periods.During these …
Ammonium Nitrate Emulsion (also called EP or Emulsion Phase) is ammonium nitrate dissolved in water and suspended in oil. It is an oxidising agent used to manufacture a range of bulk blasting agents. The oil surface gives emulsion based products improved water resistance. ... Crusher. A machine used for reducing the size of rock and minerals by ...
Model skill in simulating FFBC in the Arctic is discussed in section 4.3. The organic carbon component is strongly underestimated by the model in winter and spring when FFOC is the main source of organic carbon. ... [47] The inclusion of ammonium nitrate aerosols does not increase aerosol forcing much before 2000, but mitigates its decrease in ...
The ammonium nitrate solution from the pipe reactor neutralisation step is first concentrated to 99,8 % in an air swept falling film evaporator, with steam condensing in the shell. If porous ammonium nitrate prills suitable for industrial explosives are to be made, then 95 % solution is pumped directly to the mixing tank for re-dissolving ...
A new nitrate–ammonium quota model is formulated, calibrate, and test that accounts for nitrate and ammonium uptake, as well as the effects of nitrogen starvation length and ammonia-induced nitrate uptake inhibition, and provides a framework for evaluating the potential broader ecological and environmental consequences of ambient nitrateand …
Algal blooms have thrived on the third-largest shallow lake in China, Taihu over the past decade. Due to the recycling of nutrients such as nitrate and ammonium, this problem has been difficult to eradicate. Sediment flux, a product of diagenesis, explains the recycling of nutrients. The objective was to simulate the seasonal spatial variations of nitrate and …
300 bar and hydrogen and nitrogen are catalytically converted to ammonia. Tailgas Scrubbing The ammonia in the purge gas from the ammonia unit is recovered in the tailgas scrubbing unit and fed to a refrigeration unit. The treated purge gas is used as fuel for the primary reformer. The building blocks offered in this