Nickel Oxide Hydrogenation Catalyst With Controlled Reduction Degree
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Solution Overview
Problem
Existing hydrogenation catalysts for hydrocarbon resins face challenges in maintaining high nickel content while ensuring proper dispersibility and activity, and they struggle with selective hydrogenation of unsaturated hydrocarbons, particularly in controlling the reduction degree of nickel metal and the formation of passivation layers.
Innovation Solution
A catalyst comprising nickel oxide, copper oxide, and sulfur oxide is developed, allowing for a controlled reduction degree of nickel metal by removing or retaining a passivation layer, with a deposition-precipitation method to support nickel on silica, enhancing dispersibility and activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high nickel content is used to ensure catalyst activity, then activity is improved, but dispersibility decreases and crystallite size increases
Solution Approach 1:
The catalyst is divided into multiple functional components: nickel oxide as active ingredient, copper oxide as promoter, sulfur oxide as promoter, and silica carrier as support. This segmentation allows each component to perform its specific function - nickel provides activity, copper and sulfur promoters enhance performance, and silica provides dispersion support, thereby resolving the contradiction between high nickel content and dispersibility
Solution Approach 2:
The invention uses a composite catalyst system comprising nickel oxide, copper oxide, sulfur oxide, and silica carrier. This composite structure allows the combination of high nickel content (40-90 wt%) with proper dispersibility, as the silica carrier and promoter components work together to maintain small crystallite size while accommodating high nickel loading
2Stability of the object's composition
If nickel content is lowered to maintain dispersibility, then dispersibility is improved, but activity is reduced
Solution Approach 1:
The invention changes the chemical state parameters of nickel by using nickel oxide instead of metallic nickel, and controls the reduction degree (40-90%) to optimize both dispersibility and activity. The presence of copper oxide and sulfur oxide promoters further modifies the electronic and structural parameters, allowing high nickel content (40-90 wt%) to be maintained while preserving small crystallite size and high dispersibility
3Reliability
If nickel is used for hydrogenation reaction, then activity is high, but selectivity for aromatic groups is poor
Solution Approach 1:
Copper oxide and sulfur oxide are introduced as intermediary promoter components that modify the nickel catalyst's interaction with aromatic substrates. These promoters act as mediators that maintain high overall hydrogenation activity while selectively influencing the reaction pathway to improve aromatic group hydrogenation efficiency, thereby resolving the selectivity issue
4Stability of the object's composition
If passivation layer is present on nickel metal, then catalyst stability is improved, but reduction degree and activity are reduced
Solution Approach 1:
The invention dynamically controls the passivation layer on nickel metal by adjusting the reduction degree parameter (40-90%). This dynamic approach allows optimization between stability and activity - the passivation layer provides stability when present, while controlled removal or reduction maintains high activity when needed, with the optimal balance achieved through the specified reduction degree range and promoter composition
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The catalyst achieves high aromatic/olefin selectivity and produces a water-white resin by controlling the aromatic content in hydrocarbon resins, improving catalyst activity and life through precise nickel reduction management.
Implementation Method 1
a reduction degree of the active ingredient is controllable according to a removal of a passivation layer
Implementation Method 2
a catalyst for a hydrogenation reaction, which includes an active ingredient, a promoter, and a support
Implementation Method 3
a deposition-precipitation method to support nickel on silica
Data Source
AI summary
The present invention relates to a catalyst for a hydrogenation reaction and a method for producing the same, and more specifically, to a catalyst for a hydrogenation reaction, wherein the catalyst includes nickel oxide as an active ingredient and copper oxide and sulfur oxide as a promoter, and especially, can control a reduction degree value according to whether or not a passivation layer of a nickel metal is removed.