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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 3. Отображено 3.
04-04-2023 дата публикации

Sodium titanate nanowire supported copper catalyst as well as preparation method and application thereof

Номер: CN115888711A
Автор: XIAO LINJIU, WANG AILI, YIN HENGBO, HE YANSHENG, LI QIAOYUN, ZHAO JIAOJIAO, ZHANG JINZHU
Принадлежит:

The invention discloses a sodium titanate nanowire supported copper catalyst, which is characterized in that a sodium titanate nanowire is used as a carrier, copper nanoparticles are supported on the sodium titanate nanowire, and the size of the copper nanoparticles is 4-10 nm; the sodium titanate nanowire is of a linear layered structure, and the average diameter of the sodium titanate nanowire is 70nm; the loading capacity of the copper nanoparticles is 4%-20%. The invention also provides a preparation method of the sodium titanate supported copper catalyst and a method for preparing calcium lactate and hydrogen by using the sodium titanate supported copper catalyst. The sodium titanate nanowire supported copper catalyst is prepared by adopting a wet chemical reduction method, and the sodium titanate nanowire and nano-copper particles of the catalyst are small in size and good in dispersity and stability. When the catalyst is used for catalyzing glycerol dehydrogenation to prepare calcium ...

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Номер записи: 1
04-07-2023 дата публикации

Method for preparing expanded graphite

Номер: CN116375023A
Автор: YIN HENGBO, WANG HAN, WANG AILI, HUO HAOYANG
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The invention belongs to the technical field of graphite, and relates to a method for preparing expanded graphite, in particular to a method for preparing expanded graphite by using calcium hypochlorite as an oxidizing agent. Calcium hypochlorite is adopted as an oxidizing agent, and the oxidation intercalation effect of graphite is controlled by controlling the particle size of the raw material natural graphite, the dosage of the catalyst and the oxidizing agent, the reaction temperature and the stirring rotating speed. The expanded graphite product prepared by the method provided by the invention has the expansion volume up to 580mL/g, can reach or even exceed the expansion volume and expansion rate of expanded graphite prepared from potassium permanganate, shows excellent conductivity, and has the advantages of few impurity ions in the product, easiness in treatment of reaction wastes, low price and the like.

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Номер записи: 2
04-04-2023 дата публикации

Method for catalytically synthesizing calcium lactate and hydrogen by using Cu/apatite nano-catalyst

Номер: CN115894213A
Автор: XIAO LINJIU, WANG AILI, YIN HENGBO, XU QINGHUA, HE YANSHENG, LI QIAOYUN, ZHAO JIAOJIAO, ZHANG JINZHU
Принадлежит:

The invention discloses a method for catalytically synthesizing calcium lactate and hydrogen by using a Cu/apatite nano catalyst, which comprises the following steps: adding a glycerol aqueous solution, calcium hydroxide and a Cu/apatite nano catalyst into a reaction kettle, with the concentration of the glycerol aqueous solution being 0.5-2 mol/L; the molar ratio of the calcium hydroxide to the glycerol is (0.4-0.8): 1; the mass ratio of glycerol to the catalyst is 20: 1; and introducing nitrogen for purging, heating to 210-230 DEG C, carrying out constant-temperature stirring reaction for 0.5-4 hours to obtain calcium lactate reaction liquid and hydrogen, and concentrating and crystallizing the calcium lactate reaction liquid to obtain a calcium lactate product. According to the method, the Cu/apatite nano-catalyst is used for catalyzing glycerol to synthesize calcium lactate and hydrogen, and under the optimal condition, the conversion rate of glycerol is 100%, the selectivity of calcium ...

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Номер записи: 3