Carbon-coated nickel-aluminium composite material and preparation method and application thereof

An aluminum composite material, carbon-coated nickel technology, applied in separation methods, chemical instruments and methods, catalyst activation/preparation, etc. The composition and structure are novel and unique, and the effect of good industrial application prospects

Active Publication Date: 2018-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] All in all, the preparation and performance of carbon-coated metal or metal oxide materials have been paid attention to and researched, but the methods are different and the properties are also different, which has broad research prospects. Currently, the use of this composite material for the elimination of volatile organic compounds is still a field. very new topic

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  • Carbon-coated nickel-aluminium composite material and preparation method and application thereof
  • Carbon-coated nickel-aluminium composite material and preparation method and application thereof
  • Carbon-coated nickel-aluminium composite material and preparation method and application thereof

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preparation example Construction

[0049] The present invention also provides a method for preparing the carbon-coated nickel-aluminum composite material. The method includes: a. preparing a nickel-aluminum precursor; Low-carbon alkanes are used as a carbon source gas to vapor-deposit graphite shells at 750°C to 900°C to obtain the carbon-coated nickel-aluminum composite material; wherein, the time for vapor-phase deposition of graphite shells using carbon source gases is 5 to 240 minutes, The flow rate of the carbon source gas is 10-500 ml / (min·g nickel-aluminum precursor).

[0050] In the preparation method provided by the present invention, the nickel-aluminum precursor is prepared first, and then the graphite shell is wrapped on the outer surface of the nickel-aluminum core by vapor deposition. The nickel-aluminum precursor prepared in the present invention generally has a hydrotalcite crystal structure, and those skilled in the art can prepare it in various ways, such as co-precipitation and / or hydrotherma...

Embodiment 1

[0067] Preparation of nickel aluminum precursor: Weigh 11.64g (0.04mol) nickel nitrate hexahydrate and 7.5g (0.02mol) aluminum nitrate nonahydrate plus 60ml deionized water to make a mixed salt solution, and mix 5.40g (0.135mol) sodium hydroxide and 5.08g (0.048mol) of anhydrous sodium carbonate plus 120ml of deionized water to form a mixed alkali solution, and the two mixed solutions are simultaneously added dropwise to a three-necked flask with 100ml of deionized water at a constant temperature of 60°C, while stirring, strictly controlled The pH of trivalent aluminum salt and divalent nickel salt precipitation in the three-necked flask is 8 (that is, controlled between 7.9 and 8.1). After the dropwise addition, continue to stir at 60°C for 30min, age at 80°C for 24h, and centrifugally wash to neutral, and dried at 80°C to obtain highly dispersed nickel-aluminum precursor A1, its XRF elemental analysis is shown in Table 1, and the SEM picture is shown in figure 2 .

[0068]...

Embodiment 2

[0071] Preparation of nickel aluminum precursor: Weigh 11.64g nickel nitrate hexahydrate and 7.5g aluminum nitrate nonahydrate plus 60ml deionized water to make a mixed salt solution, add 5.40g sodium hydroxide and 5.08g anhydrous sodium carbonate plus 120ml deionized water Prepare a mixed alkali solution, and add the two mixed solutions dropwise into a three-necked flask with 100ml of deionized water at a constant temperature of 60°C at the same time, while stirring, strictly control the pH of the precipitation of trivalent aluminum salt and divalent nickel salt in the three-necked flask= 8.5 (that is, controlled between 8.4 and 8.6), continue to stir at 60°C for 30min after the dropwise addition, age at 80°C for 48h, centrifugally wash until neutral, and dry at 80°C to obtain a highly dispersed nickel-aluminum precursor B1.

[0072] Preparation of carbon-coated nickel-aluminum composite material: Weigh 1.0 g of nickel-aluminum precursor and place it in a porcelain boat, then...

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Abstract

The invention relates to a carbon-coated nickel-aluminium composite material and a preparation method and application thereof. The carbon-coated nickel-aluminium composite material is in a particle shape and comprises a nickel-aluminium inner core and a graphite shell covering the outer surface of the nickel-aluminium inner core. The nickel-aluminium inner core comprises elemental nickel, nickel oxides and aluminium oxides. The composite material comprises, by weight percent, 1-8% of graphite, 45-55% of the elemental nickel, 20-30% of nickel oxides and 15-34% of aluminium oxides. The carbon-coated nickel-aluminium composite material prepared through the preparation method can completely oxidize butane in industrial waste gas under a low temperature, and very good industrial application prospects are achieved.

Description

technical field [0001] The invention relates to a carbon-coated nickel-aluminum composite material and a preparation method and application thereof. Background technique [0002] At present, carbon composite materials have been widely concerned and studied due to their structure and performance characteristics, and they have good application prospects in the fields of composite materials, catalyst supports, sensors and energy conversion. The preparation methods of carbon composite materials are also various, including mechanical mixing method, impregnation roasting method, chemical vapor deposition method, arc method and so on. The structure of carbon composite materials generally includes carbon nanotube-loaded materials, carbon sphere-loaded materials, graphene-loaded materials, and carbon-coated materials according to the structure of carbon and the different bonding methods. Carbon-coated metal or metal oxide composite materials are emerging Carbon composite materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/22C23C16/26C23C16/44B01J23/755B01J37/03B01J37/08B01J37/18B01J35/02B01D53/86B01D53/72
CPCB01D53/8668C23C16/26C23C16/4417B01J23/002B01J23/755B01J35/0013B01J35/006B01J35/026B01J37/031B01J37/08B01J37/18B22F9/22B01D2257/7022B01D2258/02B22F2999/00B22F1/16B22F2201/013
Inventor 张赛赛荣峻峰林伟国于鹏谢婧新宗明生
Owner CHINA PETROLEUM & CHEM CORP
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