База данных: Статьи
Страница 1, Результатов: 4
Отмеченные записи: 0
1.
Подробнее
32.81
B19
Balakayeva , G. T
Mathematical and numerical modeling of transfer processes in the cleaning ofexhaust gases in an automobile neutralizer [Текст] / G.T Balakayeva // Әл - Фараби ат. ҚҰУ Хабаршы = Вестник КазНУ им Аль - Фараби. - Алматы, 2018. - №1(97). - Р. 127-133. - (Математика, механика, информатика сериясы=Серия математика, механика, информатика. Journal of Mathematics, Mechanics, Computer Science.)
ББК 32.81
Рубрики: Информатика
Кл.слова (ненормированные):
нейтрализатор -- каталитический нейтрализатор -- итерационный метод -- метод прогонки
Аннотация: Every year, the atmosphere in Kazakhstan is polluted approximately 5-7 million tons of pollutants,about a third of which belong to the vehicle. Also excess pollution of the air basin of the cities ofthe Republic is caused by pollution of pollutants by metallurgy, oil refining and chemical industryfactories, automobile and railway transport. The harmful substances emitted by motor transportadversely affect the air, water reservoirs, soil and the planet’s biosphere. At Nowadays car engineconsumes about 3 kilogram of atmospheric oxygen when liters of gasoline per 1 kg are burned.Every car delivers 60 m3of gas per hour, and the truck produces 120 m3of gas. These substancesare very dangerous for living organisms and finding solution for the problem of cleaning exhaustedgases is very actual.The purpose of this article is mathematical and numerical modeling on transfer processes in motor-car neutralizer with usage modern programming language and modern computing technologies.The solution of such a problem brings a certain contribution to the protection of the environmentfrom automobile exhaust gases. The task of cleaning at exhaust gases is investigated, that is tosay catalytic oxidation of exhausted gases automobile neutralizer . The mathematical model thereis a system of differential equations warm and mass transfer including heat generation from thechemical reaction. The equation system is solved through numerical methods and to create anddevelop an algorithm of computing the task of cleaning exhaust gases in automobile neutralizer.
Держатели документа:
ЗКГУ
Доп.точки доступа:
Akimbay, Sh.
B19
Balakayeva , G. T
Mathematical and numerical modeling of transfer processes in the cleaning ofexhaust gases in an automobile neutralizer [Текст] / G.T Balakayeva // Әл - Фараби ат. ҚҰУ Хабаршы = Вестник КазНУ им Аль - Фараби. - Алматы, 2018. - №1(97). - Р. 127-133. - (Математика, механика, информатика сериясы=Серия математика, механика, информатика. Journal of Mathematics, Mechanics, Computer Science.)
Рубрики: Информатика
Кл.слова (ненормированные):
нейтрализатор -- каталитический нейтрализатор -- итерационный метод -- метод прогонки
Аннотация: Every year, the atmosphere in Kazakhstan is polluted approximately 5-7 million tons of pollutants,about a third of which belong to the vehicle. Also excess pollution of the air basin of the cities ofthe Republic is caused by pollution of pollutants by metallurgy, oil refining and chemical industryfactories, automobile and railway transport. The harmful substances emitted by motor transportadversely affect the air, water reservoirs, soil and the planet’s biosphere. At Nowadays car engineconsumes about 3 kilogram of atmospheric oxygen when liters of gasoline per 1 kg are burned.Every car delivers 60 m3of gas per hour, and the truck produces 120 m3of gas. These substancesare very dangerous for living organisms and finding solution for the problem of cleaning exhaustedgases is very actual.The purpose of this article is mathematical and numerical modeling on transfer processes in motor-car neutralizer with usage modern programming language and modern computing technologies.The solution of such a problem brings a certain contribution to the protection of the environmentfrom automobile exhaust gases. The task of cleaning at exhaust gases is investigated, that is tosay catalytic oxidation of exhausted gases automobile neutralizer . The mathematical model thereis a system of differential equations warm and mass transfer including heat generation from thechemical reaction. The equation system is solved through numerical methods and to create anddevelop an algorithm of computing the task of cleaning exhaust gases in automobile neutralizer.
Держатели документа:
ЗКГУ
Доп.точки доступа:
Akimbay, Sh.
2.
Подробнее
24.54
S90
Study of poisoning and regeneration of catalytic converters of toxic components of exhaust gases from industrial enterprises and vehicles [Текст] / B. Kh. Khusain, A. R. Brodskiy, A. S. Sass [и др.] // Доклады национальной академии наук Республики Казахстан. - 2021. - №4. - Р. 143-149
ББК 24.54
Рубрики: Химическая кинетика. Горение, детонация и взрывы. Катализ
Кл.слова (ненормированные):
катализ -- каталитические преобразователи -- физико-химические свойства
Аннотация: Проведено исследование влияния кислородных соединений серы на платиносодержащую систему в каталитических нейтрализаторах вредных компонентов выхлопных газов автотранспорта и промышленных предприятий. Рассматриваются процессы их отравления и регенерации. В результате проведенных исследований удалось показать, что в случае регенерации катализатора “осерненного” соединениями серы при прогреве в токе воздуха при 600 оС происходит значительное уменьшение количества серы в катализаторе, т.е. ее удаление, а сам катализатор способен восстанавливать свою активность. Небольшая часть серы, оставшаяся в катализаторе, исходя из данных ИК-спектроскопии, вероятней всего, является сульфатом алюминия - как продукт взаимодействия с оксидом алюминия вторичного носителя. Для полного удаления серы, по-видимому, необходимо восстановить катализатор в токе водорода при температуре ~ 500 оС. При, этом сера из сульфатов будет удаляться в виде H2S, а сульфат алюминия вновь переходить в оксид. Эту операцию по восстановлению оксидов серы, вероятно, можно провести, минуя стадию окисления, но при этом будет сложнее удалять продукты органических уплотнений.
Держатели документа:
ЗКУ
Доп.точки доступа:
Khusain, B.Kh.
Brodskiy, A.R.
Sass, A.S.
Yaskevich, V.I.
Rahmetova, K.S.
S90
Study of poisoning and regeneration of catalytic converters of toxic components of exhaust gases from industrial enterprises and vehicles [Текст] / B. Kh. Khusain, A. R. Brodskiy, A. S. Sass [и др.] // Доклады национальной академии наук Республики Казахстан. - 2021. - №4. - Р. 143-149
Рубрики: Химическая кинетика. Горение, детонация и взрывы. Катализ
Кл.слова (ненормированные):
катализ -- каталитические преобразователи -- физико-химические свойства
Аннотация: Проведено исследование влияния кислородных соединений серы на платиносодержащую систему в каталитических нейтрализаторах вредных компонентов выхлопных газов автотранспорта и промышленных предприятий. Рассматриваются процессы их отравления и регенерации. В результате проведенных исследований удалось показать, что в случае регенерации катализатора “осерненного” соединениями серы при прогреве в токе воздуха при 600 оС происходит значительное уменьшение количества серы в катализаторе, т.е. ее удаление, а сам катализатор способен восстанавливать свою активность. Небольшая часть серы, оставшаяся в катализаторе, исходя из данных ИК-спектроскопии, вероятней всего, является сульфатом алюминия - как продукт взаимодействия с оксидом алюминия вторичного носителя. Для полного удаления серы, по-видимому, необходимо восстановить катализатор в токе водорода при температуре ~ 500 оС. При, этом сера из сульфатов будет удаляться в виде H2S, а сульфат алюминия вновь переходить в оксид. Эту операцию по восстановлению оксидов серы, вероятно, можно провести, минуя стадию окисления, но при этом будет сложнее удалять продукты органических уплотнений.
Держатели документа:
ЗКУ
Доп.точки доступа:
Khusain, B.Kh.
Brodskiy, A.R.
Sass, A.S.
Yaskevich, V.I.
Rahmetova, K.S.
3.
Подробнее
35
R24
Rasulov, S. R.
Development of effective catalysts for processing C3-C4 Hydrocarbons. [Текст] / S. R. Rasulov, G. R. Mustafayeva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 87-93
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
refinery gases -- 3-C4 hydrocarbons -- zeolite-containing catalyst -- modifiers -- reaction-regeneration cycles.
Аннотация: The aim of the article is to study the effect of preparation and activation methods of a modified zeolite-containing catalyst on the activity and stability of catalytic properties displayed by it during the conversion of C3-C4 hydrocarbons. During the experiment, the industrial cracking catalyst OMNIKAT, which is a zeolite in the sodium form, was used as the initial one. Zinc, gallium, and REE (rare earth elements) were sequentially applied to decationized samples of this catalyst by ion exchange, impregnation, and dry mechanical mixing, and the effect of these methods on the catalytic properties of the zeolite-containing catalyst was observed. As a result of a comparative analysis of the regularities of aromatization of C3-C4hydrocarbons, it was found that the mechanical mixing method is the most preferable, since it provides the best process performance.
Держатели документа:
WKU
Доп.точки доступа:
Mustafayeva, G.R.
R24
Rasulov, S. R.
Development of effective catalysts for processing C3-C4 Hydrocarbons. [Текст] / S. R. Rasulov, G. R. Mustafayeva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 87-93
Рубрики: chemical Technology
Кл.слова (ненормированные):
refinery gases -- 3-C4 hydrocarbons -- zeolite-containing catalyst -- modifiers -- reaction-regeneration cycles.
Аннотация: The aim of the article is to study the effect of preparation and activation methods of a modified zeolite-containing catalyst on the activity and stability of catalytic properties displayed by it during the conversion of C3-C4 hydrocarbons. During the experiment, the industrial cracking catalyst OMNIKAT, which is a zeolite in the sodium form, was used as the initial one. Zinc, gallium, and REE (rare earth elements) were sequentially applied to decationized samples of this catalyst by ion exchange, impregnation, and dry mechanical mixing, and the effect of these methods on the catalytic properties of the zeolite-containing catalyst was observed. As a result of a comparative analysis of the regularities of aromatization of C3-C4hydrocarbons, it was found that the mechanical mixing method is the most preferable, since it provides the best process performance.
Держатели документа:
WKU
Доп.точки доступа:
Mustafayeva, G.R.
4.
Подробнее
24
Z63
Zhumabek, M.
Ni-Al-Mg-Mn composite catalysts for partial oxidation of natural gas. [Текст] / M. Zhumabek, G. N. Kaumenova, A. Manabayeva, R. O. Sarsenova, S. O. Kotov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 19-26
ББК 24
Рубрики: chemistry
Кл.слова (ненормированные):
catalytic oxidation -- methane -- synthesis-gas -- nickel -- magnesium
Аннотация: the problem of rational utilization of natural and associated petroleum gases and the cessation of their flaring is one of the acute and unresolved environmental problems. The aim of this work is to develop effective thermally stable catalysts ofa new generation for the processes of oxidative conversion of light alkanes of natural and associated gas into synthesis gas. The results of partial oxidation of the methane of natural gas on the catalysts prepared by solution combustion synthesis are presented. Investigation of the activity of catalysts produced from initial mixture of Ni(NO3)2-Al(NO3)3-Mg(NO3)2-Mn(NO3)2+ urea of different composition was carried out for the production of synthesis-gas. It was found that the optimal conditions for producing of synthesis-gas are: CH4conversion higher than 95%, yield of target products: Н2-97 -99% and СО -40 -43%, Т = 900оС, space velocity –2500 and 6500 h-1. The catalysts were studied by X-ray diffraction, transmission electron microscopy, specific surface area, pore volume and average pore diameter. The presence in the catalysts of simple and mixed oxides, metal aluminates and spinel-type structures, the presence of which contributes to the active work of catalysts for oxidativeconversion of CH4, has been established.
Держатели документа:
WKU
Доп.точки доступа:
Kaumenova, G.N.
Manabayeva, A.
Sarsenova, R.O.
Kotov, S.O.
Z63
Zhumabek, M.
Ni-Al-Mg-Mn composite catalysts for partial oxidation of natural gas. [Текст] / M. Zhumabek, G. N. Kaumenova, A. Manabayeva, R. O. Sarsenova, S. O. Kotov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 19-26
Рубрики: chemistry
Кл.слова (ненормированные):
catalytic oxidation -- methane -- synthesis-gas -- nickel -- magnesium
Аннотация: the problem of rational utilization of natural and associated petroleum gases and the cessation of their flaring is one of the acute and unresolved environmental problems. The aim of this work is to develop effective thermally stable catalysts ofa new generation for the processes of oxidative conversion of light alkanes of natural and associated gas into synthesis gas. The results of partial oxidation of the methane of natural gas on the catalysts prepared by solution combustion synthesis are presented. Investigation of the activity of catalysts produced from initial mixture of Ni(NO3)2-Al(NO3)3-Mg(NO3)2-Mn(NO3)2+ urea of different composition was carried out for the production of synthesis-gas. It was found that the optimal conditions for producing of synthesis-gas are: CH4conversion higher than 95%, yield of target products: Н2-97 -99% and СО -40 -43%, Т = 900оС, space velocity –2500 and 6500 h-1. The catalysts were studied by X-ray diffraction, transmission electron microscopy, specific surface area, pore volume and average pore diameter. The presence in the catalysts of simple and mixed oxides, metal aluminates and spinel-type structures, the presence of which contributes to the active work of catalysts for oxidativeconversion of CH4, has been established.
Держатели документа:
WKU
Доп.точки доступа:
Kaumenova, G.N.
Manabayeva, A.
Sarsenova, R.O.
Kotov, S.O.
Страница 1, Результатов: 4