Nitrogen-doped carbon-based catalyst, and preparation method therefor and use thereof

By using a nitrogen-doped carbon-based catalyst supported on platinum, the problem of controlling the hydrogenolysis reaction in the dehydrogenation process of alkyl-substituted cyclohexane was solved, achieving a dehydrogenation effect with high conversion rate and low by-products.

WO2026145179A1PCT designated stage Publication Date: 2026-07-09CHINA PETROLEUM & CHEMICAL CORP +1
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2025-12-24
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

Existing dehydrogenation catalysts cannot effectively control the hydrogenolysis reaction, leading to increased difficulty in purifying the target product hydrogen and loss of hydrogen storage medium. Furthermore, existing catalysts exhibit numerous side reactions during the dehydrogenation of alkyl-substituted cyclohexane.

Method used

A nitrogen-doped carbon-based catalyst supported on platinum is used. Nitrogen doping is achieved by contacting the carbon-based support with an ammonia source, followed by immersion in a platinum ion solution to reduce and form platinum metal particles. By controlling the particle size of the platinum particles and the nitrogen doping ratio, the stable bonding between platinum and the carbon-based support is ensured, and the hydrogenolysis reaction is reduced.

Benefits of technology

It effectively reduces hydrogenolysis byproducts in the dehydrogenation reaction, maintains a high reaction conversion rate, and the content of alkane byproducts in the product is less than 0.3 wt.%, with a conversion rate of 85% or higher.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN2025144971_09072026_PF_FP_ABST
    Figure CN2025144971_09072026_PF_FP_ABST
Patent Text Reader

Abstract

The present invention relates to a catalyst. The catalyst comprises a nitrogen-doped carbon-based carrier loaded with platinum metal particles existing in the form of a zero-valent element, wherein the doping nitrogen comprises more than 40% to 80% of nitrogen atoms simultaneously connected to three carbon atoms via chemical bonds, and 0% to 1% of nitrogen atoms connected to oxygen atoms via chemical bonds; and on the basis of the total weight of the catalyst, the catalyst comprises 0.1 wt.% to 2 wt.% of the doping nitrogen, and 0.1 wt.% to 1.5 wt.% of the platinum metal particles. The present invention further relates to a preparation method for the catalyst and the use of the catalyst in a dehydrogenation reaction. The catalyst of the present invention has a good dehydrogenation activity and a low hydrogenolysis activity.
Need to check novelty before this filing date? Find Prior Art