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KL molecular sieve loaded monatomic Pt and PtxFe cluster structure catalyst and preparation method and application thereof

A structural catalyst, molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as reducing the effect of additives added, and insufficient contact between additives and Pt, and reducing the product. The generation of carbon, the simple and easy synthesis process, and the effect of uniform morphology

Active Publication Date: 2019-02-22
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing problem is that the auxiliary agent and Pt cannot be fully contacted, thereby greatly reducing the effect of the auxiliary agent

Method used

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  • KL molecular sieve loaded monatomic Pt and PtxFe cluster structure catalyst and preparation method and application thereof
  • KL molecular sieve loaded monatomic Pt and PtxFe cluster structure catalyst and preparation method and application thereof
  • KL molecular sieve loaded monatomic Pt and PtxFe cluster structure catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Take 3g of KL molecular sieve and disperse it in 50ml of absolute ethanol, mix it evenly and disperse it evenly on a quartz plate, dry it in the air at room temperature for 2 hours, and then transfer it to the reaction chamber of the atomic layer deposition equipment. The ALD deposition parameters set are: reaction Temperature 300°C; Reaction source: Iron source adopts ferrocene (Fe(Cp) 2 ) as the precursor, and the platinum source uses trimethyl-methylcyclopentadiene platinum (MeCpPtMe 3 ) is the precursor, and the oxidizing agent is O 3 . (Fe(Cp) 2 Temperature 90°C, MeCpPtMe 3 The temperature is 60°C, O 3 for room temperature. Carrier gas: 50sccm high-purity nitrogen; single cycle pulse, deposition and purge time: first (Fe(Cp) 2 The pulse time is 1s, the deposition time is 20s, and the purge time is 40s; then O 3 The pulse time is 1s, the response time is 20s, and the purge time is 40s. MeCpPtMe after Fe single cycle 3 The pulse time is 0.5s, the deposition ...

Embodiment 2

[0061] Take 3g of KL molecular sieve and disperse it in 50ml of absolute ethanol, mix it evenly and disperse it evenly on a quartz plate, dry it in the air at room temperature for 2 hours, and then transfer it to the reaction chamber of the atomic layer deposition equipment. The ALD deposition parameters set are: reaction Temperature 300°C; Reaction source: Iron source adopts ferrocene (Fe(Cp) 2 ) as the precursor, and the platinum source uses trimethyl-methylcyclopentadiene platinum (MeCpPtMe 3 ) is the precursor, and the oxidizing agent is O 3 . (Fe(Cp) 2 Temperature 90°C, MeCpPtMe 3 The temperature is 60°C, O 3 for room temperature. Carrier gas: 50sccm high-purity nitrogen; single-cycle pulse, deposition and purge time: first (Fe(Cp) 2 The pulse time is 1s, the deposition time is 20s, and the purge time is 40s; then O 3 The pulse time is 1s, the response time is 20s, and the purge time is 40s. MeCpPtMe after two cycles of Fe 3 The pulse time is 0.5s, the deposition...

Embodiment 3

[0063] Take 3g of KL molecular sieve and disperse it in 50ml of absolute ethanol, mix it evenly and disperse it evenly on a quartz plate, dry it in the air at room temperature for 2 hours, and then transfer it to the reaction chamber of the atomic layer deposition equipment. The ALD deposition parameters set are: reaction Temperature 300°C; Reaction source: Iron source adopts ferrocene (Fe(Cp) 2) as the precursor, and the platinum source uses trimethyl-methylcyclopentadiene platinum (MeCpPtMe 3 ) is the precursor, and the oxidizing agent is O 3 . (Fe(Cp) 2 Temperature 90°C, MeCpPtMe 3 The temperature is 60°C, O 3 for room temperature. Carrier gas: 50sccm high-purity nitrogen; single-cycle pulse, deposition and purge time: first (Fe(Cp) 2 The pulse time is 1s, the deposition time is 20s, and the purge time is 40s; then O 3 The pulse time is 1s, the response time is 20s, and the purge time is 40s. MeCpPtMe after three cycles of Fe 3 The pulse time is 0.5s, the depositio...

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Abstract

The invention discloses a KL molecular sieve loaded monatomic Pt and PtxFe cluster structure catalyst and a preparation method and an application thereof. The KL molecular sieve loaded monatomic Pt and PtxFe cluster structure zeolite catalyst is prepared by means of advanced atomic layer deposition equipment which is high in controllability. Pt can be controlled to coexist with PtxFe (x is greaterthan 8 but less than 13) in a monatomic form and the two are highly dispersed in pores of a molecular sieve, so that contact between Pt and Fe is improved greatly. The catalyst can improve the utilization ratio of the active center of Pt greatly, the aromatization process of alkane is facilitated as a result of different structure forms of PtxFe, Pt in the monatomic form is an effective active center in a dehydrogenation process of alkane, and an intermediate specie after dehydrogenation finishes the aromatization process in the PtxFe cluster, so that the selectivity of alkane is improved greatly and the side reactions are reduced.

Description

technical field [0001] The invention belongs to the field of catalysts, and relates to a molecular sieve, in particular to a Pt / KL molecular sieve catalyst, and more specifically to a KL molecular sieve loaded with single-atom Pt and Pt x Catalyst with Fe cluster structure and its preparation method and application. Background technique [0002] Improving the aromatization activity and selectivity of paraffins (one of hexane, heptane, and octane) on Pt / KL molecular sieve catalysts has attracted widespread attention of scholars at home and abroad. Pt / KL molecular sieve reforming catalyst has basicity, single function and unique pore structure. Compared with bifunctional catalysts, it is effective for C 6 ~C 8 Linear alkanes have extremely high aromatization activity and selectivity, so the development and research of Pt / KL system catalysts for naphtha catalytic reforming has great scientific research value and can produce considerable economic benefits. [0003] In order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/63C07C5/41C07C15/04C07C15/06C07C15/08
CPCB01J29/63C07C5/41C07C15/04C07C15/06C07C15/08Y02P20/52
Inventor 李永旺徐丹陶智超黄丽华王树元吴宝山杨勇
Owner SYNFUELS CHINA TECH CO LTD
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