Ignition and Self-Supporting Burning of Gas-Air Mixtures with Hydrogen Admixtures on Platinum Wire

Калінчак, В. В.; Chernenko, A. S.; Софронков, А. Н.; Fedorenko, Aleksey

doi:10.15330/pcss.18.4.454

Cited by 2 publications

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“…In [7] it was experimentally shown that if the combustible gas impurity concentration is higher than some critical value, then after switching off the electric current the catalytic combustion of hydrogen or ammonia in a cold gas mixture on a thin platinum wire becomes Electric Resistence Hysteresis of Platinum Filament in Cold Air/Hydrogen Mixtures 421 self-supporting. In [12], the limit values of hydrogen impurity concentration and catalyst temperature are analytically found, above which the catalytic flameless self-supporting stable combustion of gas-air mixtures of room temperature on platinum wire is observed.…”

Section: Introductionmentioning

confidence: 98%

Electric resistence hysteresis of platinum filament in chilled air/hydrogen mixtures

Калінчак

Черненко

Fedorenko

2020

Phys. Chem. Solid St.

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Ignition of gaseous combustible mixtures on catalytically active hot solid surfaces has numerous applications in many industrial processes and is a complex process that involves close interaction between surface processes and transfer processes in the gas mixture. In this paper, stable and critical states catalytic oxidation of hydrogen impurities in air on a platinum filament are considered. It is shown that filament temperature and its resistance depending on the mixture temperature and hydrogen concentration are of the hysteresis features. Within this hysteresis region, it is possible to achieve the catalytic combustion mode of hydrogen as a result preheating the catalyst filament above a certain critical value. The dependence of the limiting hydrogen's concentration on catalyst filament's diameter, above which is observed in the cold gas mixture self-sustaining catalytic combustion without electric current.

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Section: Introductionmentioning

confidence: 98%

Electric resistence hysteresis of platinum filament in chilled air/hydrogen mixtures

Калінчак

Черненко

Fedorenko

2020

Phys. Chem. Solid St.

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“…5 • 1 0 6 1 / c , При деякому значенні концентрації Y f.sb (sb -self-supporting burning) горючого газу критичне значення сили струму погасання зменшується до нуля. Тоді при концентраціях горючого газу Y f. >Y f.sb при вимкненні сили струму каталітичне горіння продовжується (самопідтримується) [15].…”

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About the Possibility of Using Thermochemical Gas Analyzers in a Multicomponent Mixture

Chernenko¹,

Калінчак²,

Roziznany³

et al. 2023

SEMST

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Kinetic parameters finding’s method of heterogeneous catalytic oxidation reactions of combustible gas’s small impurities in air on a thin platinum wire was described. It consists in obtaining from the wire’s current-voltage characteristic the dependence of the critical current values on its mass fraction in air. They corresponding to the catalytic ignition and extintion of the gas impurity. A method of determining the content of two combustible gases in the air, what based on processing the platinum wire’s current-voltage characteristic, was proposed. Depending on the level of the total gases concentration in the air, the determining experimental characteristics are not only the wire (catalyst) overheating relative to the inert wire under the conditions of catalytic ignition, but also the wire overheating during catalytic extinguishing or under conditions of self-sustaining catalytic combustion (without electric current heating).

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Ignition and Self-Supporting Burning of Gas-Air Mixtures with Hydrogen Admixtures on Platinum Wire

Cited by 2 publications

References 2 publications

Electric resistence hysteresis of platinum filament in chilled air/hydrogen mixtures

Electric resistence hysteresis of platinum filament in chilled air/hydrogen mixtures

About the Possibility of Using Thermochemical Gas Analyzers in a Multicomponent Mixture

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