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Preparation method, product and application of nicu catalyst for selective hydrogenation of acetylene or butadiene in monoolefin-rich atmosphere

A catalyst and butadiene technology, applied in catalysts, carbon compound catalysts, chemical instruments and methods, etc., can solve the problems of easy aggregation of metals, short catalyst life, inability to meet industrial applications, etc., and achieve high selectivity and high ratio. Mass activity, the effect of inhibiting the formation of green oil and carbon deposits

Active Publication Date: 2022-04-29
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nevertheless, on the one hand, the easy aggregation of single-atom catalyst metals and low metal loading still largely limit its practical application in industrial production; on the other hand, the above-mentioned non-noble metal single-atom catalysts still have more Carbon deposits are generated, resulting in short catalyst life, which cannot meet the requirements of industrial applications

Method used

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  • Preparation method, product and application of nicu catalyst for selective hydrogenation of acetylene or butadiene in monoolefin-rich atmosphere
  • Preparation method, product and application of nicu catalyst for selective hydrogenation of acetylene or butadiene in monoolefin-rich atmosphere
  • Preparation method, product and application of nicu catalyst for selective hydrogenation of acetylene or butadiene in monoolefin-rich atmosphere

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Embodiment 1

[0077] In order to have a clearer understanding of the technical features, objectives and beneficial effects of the present invention, the present invention will now be described in further detail in conjunction with the following figures and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Example 1: Ni 1 Cu 2 / g -C 3 N 4 Catalyst Preparation and Activity Test in Selective Hydrogenation of Acetylene and 1,3-Butadiene

[0078] g-C 3 N 4 Vehicle: use g-C purchased from TCI 3 N 4 Vector (CAS: 143334-20-7).

[0079] Deposition of Cu additive: Acquired by atomic layer deposition. Using a self-made closed chamber atomic layer deposition reactor (ACME (Beijing) Technology Co., Ltd), at 300 ° C, using bis(hexafluoroacetylacetonate) copper (Cu(hfac) 2 , Aladdin Chemicals) and formaldehyde solution (Aladdin Chemicals) for Cu ALD. Using ultra-high purity N 2 (...

Embodiment 2

[0091] Example 2: Ni 3 Cu 2 / g -C 3 N 4 Preparation of Catalyst and Its Activity Test in Selective Hydrogenation of 1,3-Butadiene

[0092] Ni 3 Cu 2 / g -C 3 N 4 Preparation of: Ni prepared in Example 1 1 Cu 2 / g -C 3 N 4 It can be obtained by continuing to deposit two cycles of Ni compound ALD on the catalyst. NiCp 2 The precursor container was heated to 90°C to obtain sufficient vapor pressure, the ALD reaction chamber was heated to 240°C, and the gas inlet pipe was kept at 115°C to avoid condensation of the precursor on the inner wall. The Ni prepared in 400mg embodiment 1 1 Cu 2 / g -C 3 N 4 The catalyst is placed in the reaction chamber, NiCp 2 Precursor feed, N 2 Purge, O 2 Access and N 2 The purging time is 840, 200, 840 and 200s respectively. The sample was taken out of the reaction chamber after two consecutive deposition cycles to obtain Ni 3 Cu 2 / g -C 3 N 4 Catalyst sample, its atomic resolution spherical aberration corrected electron microsc...

Embodiment 3

[0097] Embodiment 3 (with nitrogen-doped carbon nanotubes (NCNT) as carrier): Ni 1 Cu 2 Preparation of / NCNT catalyst

[0098] Ni 1 Cu 2 Preparation of / NCNT: The same procedure as in the above-mentioned Example 1 was carried out, except that the carrier used was nitrogen-doped carbon nanotube (NCNT) purchased from Aladdin Company.

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Abstract

The invention discloses a preparation method of an anti-carbon deposition non-noble metal NiCu catalyst used for selective hydrogenation of acetylene or 1,3-butadiene in a mono-olefin-rich atmosphere, as well as its product and application. The catalyst comprises a carrier, an additive Cu of 1-12wt% in terms of Cu and an active component of Ni hydroxide in an amount of 1-9wt% in terms of Ni, and the additive is deposited on the carrier by an atomic deposition method to obtain The supported catalyst precursors are then obtained by depositing the active components by atomic deposition. The non-precious metal NiCu catalyst with high selectivity and anti-carbon deposition obtained by the present invention can show excellent catalytic performance in the selective hydrogenation reaction of acetylene or 1,3-butadiene in the atmosphere rich in monoolefins, not only can high selectivity The required selective hydrogenation can be realized permanently, and the generation of green oil and carbon deposit can be completely suppressed and the stability can be maintained for more than 350 hours in the hydrogenation reaction.

Description

technical field [0001] The invention relates to a preparation method of an anti-carbon deposition non-noble metal NiCu catalyst used for selective hydrogenation of acetylene or 1,3-butadiene in a mono-olefin-rich atmosphere, as well as its product and application. Background technique [0002] With the development of social economy, ethylene plays an increasingly important role in industrial production, and its output has become an important symbol to measure the development level of a country's petroleum industry. Since ethylene comes from the hydrocarbon steam cracking method, the outlet gas of the cracking furnace contains about 0.1% to 0.5% (volume) acetylene, which will cause the catalyst for downstream polyolefin production to be easily poisoned and deactivated. Therefore, a small amount of acetylene in ethylene is removed while avoiding Overhydrogenation to ethane is of great concern. [0003] The methods used to remove acetylene in ethylene units mainly include solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C07C5/09C07C11/04C07C5/05C07C11/08
CPCB01J27/24C07C5/09C07C5/05C07C2527/24C07C11/04C07C11/08Y02P20/52
Inventor 路军岭古健
Owner UNIV OF SCI & TECH OF CHINA