Catalytic heat generating element for autonomous domestic heating systems

Lukyanov, B. N.; Кириллов, В. А.; Kuzin, N. A.; Danilova, M.M.; Куликов, А. В.; Шигаров, А. Б.

doi:10.1016/s1385-8947(02)00153-5

Cited by 6 publications

(6 citation statements)

References 20 publications

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“…Во-первых, при каталитическом сжигании за счет снижения температуры процесса на несколько сотен градусов можно исклю-чить образование оксидов азота [1]. Во-вторых, в этом случае можно полу-чать тепловой поток с умеренными температурами, который более удобно и безопасно использовать в целях нагрева, в частности, в нагревателях воздуха или в теплообменных аппаратах для нагрева теплоносителей, например в бойлерных установках [2].…”

Section: Introductionunclassified

Catalytic heating element based on the platinum-containing glass-fiber catalyst IC-12-S111

Куликов¹,

Zagoruiko²,

Lopatin³

et al. 2015

Science Bulletin of the NSTU

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Работа посвящена разработке каталитического нагревательного элемента, работающего на газовом топливе (пропан-бутан). Предложенная конструкция элемента включает радиаль-ный слой платинового стекловолокнистого катализатора ИК-12-С111, синтезированного мето-дом импульсного поверхностного термосинтеза. Этот катализатор отличается высокой актив-ностью в реакциях глубокого окисления углеводородов при умеренном содержании (0.05-0.08 % вес.) платины, а также высокой термостойкостью и стабильностью работы. Этот ката-лизатор может производиться по технологии, отличающейся простотой и безотходностью, а также позволяющей использовать в качестве носителя доступные и недорогие отечественные стеклоткани.Топливный газ подается внутрь элемента, а его смешение с кислородом происходит за счет диффузии и естественной конвекции непосредственно в слоях каталитической стеклот-кани. В такой конструкции полностью отсутствуют движущиеся части, а также какие-либо побудители расхода как топливного газа, так и воздуха, за счет чего достигается простота и высокая надежность конструкции. Изготовленный прототип нагревательного элемента обес-печивает устойчивую работу в диапазоне удельных тепловых мощностей от 7 до 26 кВт/м 2 , при этом в диапазоне мощностей от 10 до 15 кВт/м 2 достигается уровень эффективности сжигания топлив более 99 %, в продуктах сгорания полностью отсутствуют СО и оксиды азота, а остаточное содержание углеводородов не превышает 40 ррм. При этом в ходе экспе-риментов не наблюдалось признаков дезактивации катализатора, а катализатор, извлечен-ный из КНЭ после испытаний, не утратил гибкости и механической прочности. Предложен-* Статья получена 12 января 2015 г.

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Section: Introductionunclassified

Catalytic heating element based on the platinum-containing glass-fiber catalyst IC-12-S111

Куликов¹,

Zagoruiko²,

Lopatin³

et al. 2015

Science Bulletin of the NSTU

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“…4 The choice of a particular method depends on the specific operating conditions of the catalyst and the catalytic heat source/heat absorber system as a whole. The purpose of this paper is to analyze the trends in research and development of catalytic heat sources for TEGs and to seek ways to widen the scope of their application.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Generators: Current Status

Анатычук

Strutynska

Mykhailovsky

2010

Journal of Elec Materi

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confidence: 99%

“…In this case, CO and NO x emissions are almost zero and the energy conversion efficiency in water-heating systems reaches 96-98%. In our previous works [2][3][4][5][6], to produce heat by catalytic combustion of natural gas, we proposed a radial heating element that comprised a structured porous metal catalyst bed sintered with a tubular heat exchanger (which was also radial). Tests of this heating element showed its promise for efficient and environmentally clean heat production.…”

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confidence: 99%

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Radial Reactor-Heat Exchanger for Natural Gas Combustion in a Structured Porous Metal Catalyst Bed

Кириллов

Kuzin

Кузьмин

et al. 2005

Theor Found Chem Eng

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The development of efficient low-emission power plants for heat production in domestic power supply holds promise for modern power engineering [1][2][3][4][5][6][7][8].One of the solutions to this problem is to use catalysts for hydrocarbon fuel combustion. In this case, CO and NO x emissions are almost zero and the energy conversion efficiency in water-heating systems reaches 96-98%. In our previous works [2][3][4][5][6], to produce heat by catalytic combustion of natural gas, we proposed a radial heating element that comprised a structured porous metal catalyst bed sintered with a tubular heat exchanger (which was also radial). Tests of this heating element showed its promise for efficient and environmentally clean heat production. Therefore, in this work, this type of reactor was theoretically and experimentally studied in detail. EXPERIMENTALA schematic and picture of the catalytic heating element are shown in Fig. 1. The catalytic heating element has a cylindrical shape and consists of ring-type tubular heat exchanger 1 within which is perforated gas-distribution tube 2 . Through this tube, an air-gas mixture is fed. Around the gas-distribution tube, splitter 3 is placed for better gas distribution and suppression of jets bursting forth from holes. Catalytically active bed 4 has a regular structure and consists of flat metal bands 5 and corrugated metal bands 6 that are wound on tubes of heat exchanger 1 and sintered with these tubes. The bands are gas-permeable and form catalytically active channels 2.5 mm in diameter. The bands are ~1 mm thick and 25 mm wide, the pitch is 27.5 mm, and the gap between bands is 2.5 mm. The innermost band and the outermost band are flat, and the bands between them are alternately flat and corrugated. Each band overlaps the previous band, being shifted by the pitch length. To reduce heat loss, the catalyst bed is wider than the tubular heat exchanger by the width of barrels 7 , which are heat-insulated from heat-exchanger headers 8 . To feed the cold water and remove the heated water, the catalytic heating element is equipped with pipe connections 9 and 10 , respectively. To reduce the heating element starting time, the corrugation size in outer catalyst bed 11 exceeds the critical channel size for flame to penetrate the porous structure.In the experiments, we determined the temperature distributions along the length (axis) and thickness (radius) of the cylindrical catalyst bed; simultaneously, we measured the concentrations of ëç 4 , CO, and NO x in the exhaust gases and the water temperatures at the inlet and outlet of the heat exchanger, with the flow rates of methane and air fed to the heating element being varied. The experimental conditions and the heat output are presented in Table 1.The experimental temperature distribution on the outer surface of the catalyst bed along the length (axis) of the catalytic heating element (under conditions 1 in Table 1) is shown in Fig. 2. The temperature was measured at three points in a bed section. The thermocouple junctions were plac...

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Catalytic heat generating element for autonomous domestic heating systems

Cited by 6 publications

References 20 publications

Catalytic heating element based on the platinum-containing glass-fiber catalyst IC-12-S111

Catalytic heating element based on the platinum-containing glass-fiber catalyst IC-12-S111

Catalytic Generators: Current Status

Radial Reactor-Heat Exchanger for Natural Gas Combustion in a Structured Porous Metal Catalyst Bed

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