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Friday, July 17, 2020 | History

2 edition of decomposition and combustion of unstable powders under temperature-ramped conditions found in the catalog.

decomposition and combustion of unstable powders under temperature-ramped conditions

Xing-zhon Wan

decomposition and combustion of unstable powders under temperature-ramped conditions

by Xing-zhon Wan

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Published by University of Portsmouth, Dept. of Chemistry in Portsmouth .
Written in English


Edition Notes

Thesis (Ph.D.) - University of Portsmouth, 1993.

Statementby Xing-zhon Wan.
ID Numbers
Open LibraryOL20565113M

dependent rate of decomposition. A change in conditions (e.g., increased temperature) can cause the rate of decomposition to auto-accelerate, culminating in a violent explosion. Most organic peroxides (especially lower MW compounds) are unstable at or near room temperature and must be kept under refrigeration during shipping and storage.   DO NOT put questionable powder back in your stash. Unstable nitro-compounds are a bitch especially in larger quantities. At a minimum, you can have a very serious fire. Worst case scenario is that double-based powders with high nitroglycerine content like Bullseye, WW, HP38 stored adjacently can detonate under the 'right' conditions.

Prepared composite materials based on [Zn4O(benzene-1,4-dicarboxylate)3] (MOF-5) and graphene oxide (GO) via a simple green solvothermal method, at which GO was used as platform to load MOF-5, and applied to the thermal decomposition of AP. The obtained composites were characterized by various techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), nitrogen . A combustion reaction A chemical reaction in which a reactant combines with oxygen to produce oxides of all other elements as products. occurs when a reactant combines with oxygen, many times from the atmosphere, to produce oxides of all other elements as products; any nitrogen in the reactant is converted to elemental nitrogen, N reactants, called fuels, contain mostly carbon and.

  It depends. If you are talking about decomposition like how a corpse or fallen tree decompose, there is oxidation in that process, but micro-organisms are the key, and most would not consider the process rapid. While this type of decomposition can. A combustion reaction occurs when a reactant combines with oxygen, many times from the atmosphere, to produce oxides of all other elements as products; any nitrogen in the reactant is converted to elemental nitrogen, N reactants, called fuels, contain mostly carbon and hydrogen atoms, reacting with oxygen to produce CO 2 and H 2 O. For example, the balanced chemical equation for the.


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Decomposition and combustion of unstable powders under temperature-ramped conditions by Xing-zhon Wan Download PDF EPUB FB2

James G. Speight PhD, DSc, in Handbook of Industrial Hydrocarbon Processes, 6 Spontaneous combustion. Spontaneous combustion is the phenomenon in which a hydrocarbon (or a chemical substance) substance unexpectedly bursts into flame without apparent cause.

In ordinary combustion, the hydrocarbon is deliberately heated to its ignition point to make it burn. The decomposition and combustion of unstable powders under temperature ramped conditions.

Author: Wan, Xing-Zhon. ISNI: Awarding Body: University of Portsmouth Current Institution: University of Portsmouth Date of Award. A s follows from the previous chapters, the substances used for the manufacture of composite systems, including solid rocket propellants and powders, are characterized not only by the pronounced variety o f their chemical structure and reactivity but also by the particular difference o f physical properties that, all together, predetermine a variety o f combustion : G.B.

Manelis. Decomposition vs Combustion Both decomposition and combustion are chemical processes of converting complex material into much simpler compounds. Decomposition. Decomposition is a natural process.

When animals and plants die and excrete, their bodies and other waste material are broken down into smaller pieces and ultimately to simpler forms of.

This is achieved by: (a) measurement of decomposition curves under isothermal conditions at a series of temperatures; (b) extraction of rate constants, k, for decomposition (under the experiment's conditions, the ILs exhibit zero order decomposition and k is thus simply the gradient of the linear decomposition ‘curve’); (c) determination of Author: Yongheng Li, Yong Pan, Gaosheng Huang, Qingguo Wang, Qian Wei, Juncheng Jiang.

The molecular formula $\ce{C4H9NH2}$ could be a number of different aliphatic primary amines, but all of them are stable under ordinary conditions.

In other words, you'd have to "burn" them in a combustion reaction with oxygen to get $\ce{CO2}$ and $\ce{H2O}$. In such a reaction I would absolutely not expect to get $\ce{N2}$ as a product.

Equations, describing the combustion process, are the following: The boundary conditions are as follows: The first integral o f the first equation gives the following heat balance in the condensed phase: c(Ts -T0) = QiTjs - Q2combustion rate.

Fig. 3a-c and Fig. S11 showed the raw nAl powders under different resolutions, in which the particle size was ~50 to nm and the thickness of Al 2 O 3 shell on the surface of nAl was ~3 to 5 nm. The Al 2 O 3 shell was then removed by HF solution, and Fc-Fx was coated on the surface of active nAl to form [email protected] nanocomposites.

The combustion of rigid PVC, flexible PVC and rigid PVC-wood mixtures has been carried out. It was observed that under smoldering conditions, rigid PVC evolves combustion gases in a sequence that agrees with the current mechanism of decomposition. It was discovered that under flaming conditions, the concentration of hydrogen chloride in the NBS.

Fig. i 6 STABILITY TESTS FOR NITROCELLULOSE (2) Traces of unstable nitro-compounds (other than nitrocel¬ lulose) would show a product in which they are found by this test to be bad ; yet these traces of comparatively unstable com¬ pounds might not cause a decomposition of the explosive if kept under ordinary conditions.

Although a slow decomposition can occur even under normal conditions of temperature, pressure, and moisture, NC remains the most important nitrate ester that is widely utilized in gunpowders and. Complete and balance each combustion equation. the combustion of propane, C 3 H 8; the combustion of ammonia, NH 3; Solution.

The products of the reaction are CO 2 and H 2 O, so our unbalanced equation is. C 3 H 8 + O 2 → CO 2 + H 2 O. Balancing (and you may have to go back and forth a few times to balance this), we get.

C 3 H 8 + 5O 2. The impact of aluminum powder on the explosive characteristics of solid-liquid mixed explosives under low fuel concentration conditions was studied us. The thermal decomposition and combustion of guanidinium 5,5'-azotetrazole salt (Gu2AzT) have been investigated.

Temperature profiles in the Gu2AzT combustion wave were measured using thin tungsten. Download Citation | Study of the Initial-Stage Kinetics for High-Temperature Decomposition of Homogeneous Blasting Powders and Composite Solid Propellants by the Method of Ignition Using a.

Thermal decomposition of FOX-7 under isothermal conditions in at constant volume showed a saturating character of gas-evolution curves at a very low extent of decomposition. Based on the data obtained on combustion of AA and HA, the kinetic parameters of the HN3 decomposition reaction occurring in the gas phase were calculated (k =.

Combination, Decomposition and Combustion Reactions. In the end, being able to write chemical equations requires some background information on what to expect the products of a given reaction will be.

Even with limited experience, it is possible to predict reaction products for. Combustion - Combustion - Physical and chemical aspects of combustion: Combustion, with rare exceptions, is a complex chemical process involving many steps that depend on the properties of the combustible substance.

It is initiated by external factors such as heat, light, and sparks. The reaction sets in as the mixture of combustibles attains the ignition temperature.

decomposition products would also contain heteroatoms. The accuracy of the universal value of kJ of heat per gram of O 2 for combustion thermally-stable, char-forming polymers and their decomposition products could then be determined. The heats of complete combustion of forty nine. A combustion reaction occurs when a reactant combines with oxygen, many times from the atmosphere, to produce oxides of all other elements as products; any nitrogen in the reactant is converted to elemental nitrogen, N reactants, called fuels, contain mostly carbon and hydrogen atoms, reacting with oxygen to produce CO 2 and H 2 O.

For example, the balanced chemical .thermal decomposition of the solid as opposed to oxidation. The authors are not aware of any fires caused by the solid bleach product, yet calcium hypochlorite is known to pose a fire hazard under certain conditions.[2] Vegetable-derived contaminants do not directly react with the fibers to generate heat.

Instead, the contaminants are soaked into.Decomposition Reactions. A decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances. The general form of a decomposition reaction is: \[\ce{AB} \rightarrow \ce{A} + \ce{B}\] Most decomposition reactions require an input of energy in the form of heat, light, or electricity.