The Explosion Hazard Research of the Polyethylene Dust

Electrochemical oxidation, widely used in green production and pollution abatement, is often accompanied by the hydrogen evolution reaction (HER), which results in a high consumption of electricity and is a potential explosion hazard. To solve this problem, we report here a method for converting the original HER cathode into one that enables the oxygen reduction reaction (ORR) without having to build new electrolysis cells or be concerned about electrolyte leakage from the O2 gas electrode. The viability of this method is demonstrated using the electrolytic production of ammonium persulfate (APS) as an example. The original carbon black electrode for the HER is converted to an ORR electrode by first undergoing in situ anodization and then contacting O2 or air bubbled from the bottom of the electrode. With this sole change, APS production can achieve an electric energy saving of up to 20.3%. Considering the ease and low cost of this modification, such significant electricity savings make this method very promising in the upgrade of electrochemical oxidation processes, with wide potential applications.

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Complex Studies on Explosion Hazard of Metalized Compositions Based on Powerful Explosives

Russian Journal of Physical Chemistry B ◽

10.1134/s199079311904016x ◽

2019 ◽

Vol 13 (5) ◽

pp. 748-754

Author(s):

N. I. Akinin ◽

A. V. Dubovik ◽

A. A. Matveev

Keyword(s):

Explosion Hazard

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ChemInform Abstract: Explosion Hazard of Some Nitro Compounds.

ChemInform ◽

10.1002/chin.199103354 ◽

2010 ◽

Vol 22 (3) ◽

pp. no-no

Author(s):

B. N. KONDRIKOV ◽

G. D. KOZAK ◽

B. M. RAIKOVA ◽

S. M. KHOROSHEV ◽

YA. S. VEGERA

Keyword(s):

Nitro Compounds ◽

Explosion Hazard

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Laboratory method of determining the rate of burnout of liquid fuel

Technology of technosphere safety ◽

10.25257/tts.2021.3.93.164-171 ◽

2021 ◽

Vol 93 ◽

pp. 164-171

Author(s):

V. V. Kuzmin ◽

◽

V. N. Mikhalkin ◽

P. V. Komrakov ◽

A. I. Karnyushkin ◽

...

Keyword(s):

Video Recording ◽

Combustion Process ◽

Laboratory Method ◽

Educational Process ◽

Laboratory Work ◽

Explosion Hazard ◽

Mass Rate ◽

Burnout Rate ◽

Liquid Combustion ◽

Different Diameters

Introduction. In accordance with the provisions GOST 12.1.044-89 (ISO 4589-84) (Fire and Explosion hazard substances and materials. Nomenclature of indicators and metods of their determination) one of the important parameters of liquid combustion are the mass rate of liquid burnout and the influence of various conditions of the combustion process on the mass burnup rate. A laboratory method for determining the mass burnout rate of a combustible liquid has been developed. Goals and objectives. The aim of the study is to develop a laboratory method for determining the mass rate of liquid burn-up, which can be used in the educational process during laboratory work and to simulate the effect of combustion conditions on the mass rate of liquid burn-up. Methods. To implement this task, we used video recording of changes in the mass of the liquid during its combustion in vessels of different diameters, followed by graphical processing of the results of experiments for calculate the burn-up rate under different combustion conditions. Results and discussion. The method was tested on the example of the combustion of acetone. An example of computer-graphical result for calculating the mass rate of acetone burn-up is given. The empirical dependents of the acetone burn-up rate on the diameter of the liquid surface area is obtained. Conclusions. A laboratory method for determining the mass rate of burnout of a flammable liquid, which can be used in the educational process during laboratory work, has been developed. In contrast to GOST 12.1.044-89 (ISO 4589-84), the developed method can use vessels with a liquid diameter of more than 60 mm. Keywords: burnout rate, acetone, laboratory technique

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Explosion hazard and prevention of Al–Ni mechanical alloy powders

Journal of Loss Prevention in the Process Industries ◽

10.1016/j.jlp.2021.104714 ◽

2021 ◽

pp. 104714

Author(s):

Haipeng Jiang ◽

Mingshu Bi ◽

Jiankan Zhang ◽

Fengqi Zhao ◽

Jiaying Wang ◽

...

Keyword(s):

Mechanical Alloy ◽

Explosion Hazard

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Evaluation of a CFD porous model for calculating ventilation in explosion hazard assessments

Journal of Loss Prevention in the Process Industries ◽

10.1016/s0950-4230(02)00113-4 ◽

2003 ◽

Vol 16 (4) ◽

pp. 341-347 ◽

Cited By ~ 4

Author(s):

C.E. Fothergill ◽

S. Chynoweth ◽

P. Roberts ◽

A. Packwood

Keyword(s):

Explosion Hazard ◽

Porous Model ◽

Hazard Assessments

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Method of estimation of annual risk from breaks, fires and explosions on the basis of state graphs in electrolysis plants

Safety and Reliability of Power Industry ◽

10.24223/1999-5555-2018-11-4-305-310 ◽

2019 ◽

Vol 11 (4) ◽

pp. 305-310

Author(s):

R. Z. Aminov ◽

E. Yu. Burdenkova ◽

A. V. Portyankin

Keyword(s):

Nuclear Power ◽

Power Plants ◽

Linear Equations ◽

The State ◽

State Graph ◽

Explosion Hazard ◽

Equipment Failures ◽

State Breakdown ◽

The Cost ◽

Annual Risk

A method is presented for estimating the possible annual risk that a hydrogen superstructure at a nuclear power plant (NPP) may have in the production of explosive hydrogen. With the observance of safety rules in terms of receiving, storing, transporting and using hydrogen, it is possible to minimize the occurrence of fi re and explosion hazard situations on the hydrogen superstructure. Scheduled repair and overhauls with all diagnostics reduce emergencies and equipment failures in the same way. However, there is a likelihood for the equipment to be found in an abnormal state (breakdown, fi re and explosion) as a result of hydrogen leaks. Depressurization of equipment with leakage of explosive hydrogen in enclosed spaces concurrently with adverse attendant factors may lead to the destruction of the electrolysis plant due to fi re and explosion. With the help of the state graph, the probabilities of a failure of electrolysis equipment because of unplanned breakdowns and possible fi res or explosions indoors due to depressurization of equipment are estimated. To this effect, possible scenarios of breakdowns of the electrolyzer in one and two workshops are considered. In the calculations of the state graph, a system of linear equations was composed for steady-state values only. The calculations have shown that for a configuration involving two electrolysis plants, the possible annual risk would increase. Minimizing the annual risk can be achieved through boosting the capacity of the electrolysis plant still in operation by increasing its productivity in hydrogen and oxygen. The effect will only be achieved if the cost of electricity from nuclear power plants is kept within 0.81 rubles/(kW·h) with a peak electricity tariff at 3.5 rubles/(kW·h).

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Effect of inert agents on the flammability parameters of selected gases and organic liquid vapours

Materiały Wysokoenergetyczne / High Energy Materials ◽

10.22211/matwys/0094e ◽

2019 ◽

pp. 108-114

Author(s):

Paulina Flasińska

Keyword(s):

Ambient Pressure ◽

Organic Liquid ◽

Explosion Hazard ◽

European Standard ◽

Flammability Limits ◽

Open Spaces ◽

Limiting Oxygen Concentration ◽

Selection Of ◽

Safe Working

Flammable substances may form explosive atmospheres when mixed with air. To prevent their formation or minimise the risk of their occurrence, it is necessary to understand the properties of the mixtures of flammable substances and to apprehend the properties characterising the course of a potential explosion. To minimise the risk of a fire or an explosion, a process called inerting is used in which, e.g. nitrogen plays the role of an inert agent. The article discusses the method for testing the flammability limits, the “bomb” method, in accordance with the European standard PN-EN 1839 and the limiting oxygen concentration (LOC) according to the European standard PN-EN 14756. The study shows the influence of inert gas on the flammability range of selected substances: hydrogen, methane, and hexane, which in practice allows the assessment of the explosion hazard of closed and open spaces, the establishment of safe working conditions, and the selection of equipment operating in given explosion hazard zones. The tests were carried out at 25 °C for hydrogen and methane and at 40 °C for hexane, at ambient pressure.

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