Hydrogenation Catalyst Alumina Titania Composite Support

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Solution Overview

Problem

Existing hydrogenation catalysts for converting aromatic hydrocarbons to alicyclic hydrocarbons suffer from instability and high occurrence of side reactions, particularly when using a large amount of metal support.

Innovation Solution

A hydrogenation catalyst with a Group X metal supported on a composite catalyst support comprising alumina and titania, where the titania is chemically and microscopically united with alumina to enhance reaction selectivity and stability, reducing the amount of metal needed while maintaining high catalytic activity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a large amount of metal is supported on a porous inorganic oxide support, then catalyst activity is improved, but stability deteriorates and side reactions increase

Engineering Contradiction:

Improvecatalyst activityVSAvoidstability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies composite materials by combining alumina and titania to form a composite support structure. This composite support provides both high surface area and enhanced stability, allowing the use of smaller amounts of metal while maintaining both high catalyst activity and stability. The synergistic effect of the composite support resolves the contradiction between activity and stability.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent utilizes porous materials by employing a porous composite support made of alumina and titania. The porous structure provides high surface area for metal dispersion and catalytic activity, while the composite nature enhances stability. This allows achieving high productivity with improved reliability by optimizing the pore structure and material composition.

Inventive Principle:

Principle #31Porous materials

2Productivity

If a large amount of metal is supported on a porous inorganic oxide support, then catalyst activity is improved, but side reactions increase

Engineering Contradiction:

Improvecatalyst activityVSAvoidside reactions

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The composite support of alumina and titania provides a synergistic effect that enhances selectivity. The specific combination of materials creates a surface that promotes the desired hydrogenation reaction while suppressing side reactions, thereby reducing harmful factors generated by the catalyst system.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the material composition parameter by using a composite of alumina and titania instead of a single inorganic oxide. This parameter change in support composition fundamentally alters the catalytic behavior, improving activity while suppressing side reactions through the unique properties of the composite material system.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If a relatively small amount of metal is supported, then stability is improved, but catalyst activity decreases

Engineering Contradiction:

ImprovestabilityVSAvoidcatalyst activity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The composite support structure of alumina and titania provides an enhanced surface area and optimized pore distribution that maximizes the utilization of metal sites. This allows achieving high catalyst activity with a relatively small amount of metal while maintaining stability, as the composite support efficiently disperses and stabilizes the metal particles.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The porous composite support provides high surface area and optimized pore structure that enhances metal dispersion and accessibility. This allows maximizing catalyst activity with minimal metal content while the composite nature ensures stability, resolving the contradiction between stability and productivity.

Inventive Principle:

Principle #31Porous materials

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 demonstrates excellent stability and reduced side reactions with a relatively small amount of metal, achieving high conversion rates and selectivity for hydrogenation reactions such as toluene to methylcyclohexane, maintaining activity over extended periods.

Implementation Method 1

a Group X metal is supported in a composite support including at least alumina and titania

Methodology Applied

Scientific EffectCatalysis: Catalysis

Implementation Method 2

hydrogenates an aromatic hydrocarbon compound into an alicyclic hydrocarbon compound

Methodology Applied

Scientific EffectHydrogenation: Hydrogenation

Data Source

PatentUS10745628B2Hydrogenation catalyst for aromatic hydrocarbon and hydrotreatment method using the catalyst

Publication Date: 2020.08.18 CHIYODA CORP

AI summary

A hydrogenation catalyst with a small amount of supported metal that is excellent in stability and inhibition of side reactions is provided. The catalyst hydrogenates an aromatic hydrocarbon compound into an alicyclic hydrocarbon compound, and a Group X metal represented by nickel is supported in a composite support including at least alumina and titania. The composite support preferably includes at least an alumina substrate coated with titania. It is also preferable that the Group X metal is prereduced by hydrogen. In the case that the Group X metal is nickel, the nickel content is preferably 5-35 wt % as nickel oxide in the catalyst. The substrate includes, for example, a porous structure formed by a plurality of needle-shaped or column-shaped intertwined three-dimensionally.