Nickel-Iron Bimetallic Catalyst on Clay for CO2 Methanation

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Solution Overview

Problem

Existing catalysts for carbon dioxide methanation and dry reforming of methane and carbon dioxide face inefficiencies in reactant conversion, product yield, and selectivity, particularly in achieving high carbon dioxide conversion and low carbon monoxide yields.

Innovation Solution

The development of nickel-iron bimetallic structure and nickel-iron bimetallic oxide structure derived from iron-containing clays, which are treated with acid and impregnated with nickel, providing a catalyst with enhanced surface area and catalytic performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional catalysts are used for carbon dioxide methanation and dry reforming, then the catalytic reactions can proceed, but the reactant conversion is low and product yield is insufficient

Engineering Contradiction:

Improvereactant conversionVSAvoidcatalytic efficiency

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent employs composite catalyst materials consisting of nickel particles supported on iron-containing clay minerals (such as nontronite, beidellite, or saponite). This composite structure combines the high catalytic activity of nickel with the high surface area and stability of iron-containing clays, achieving both high reactant conversion and reliable catalytic performance in CO2 methanation and dry reforming reactions

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The iron-containing clay minerals used as supports possess inherently high surface areas and porous structures. The patent utilizes these porous characteristics to provide numerous active sites for catalytic reactions, thereby improving reactant conversion efficiency while maintaining catalyst stability and reliability

Inventive Principle:

Principle #31Porous materials

2Manufacturing precision

If conventional catalysts are used, then reactions can occur, but selectivity for desired products is poor and undesirable products are formed

Engineering Contradiction:

Improveproduct selectivityVSAvoidundesirable product formation

Core Design Contradiction:

Manufacturing precisionVSObject-generated harmful factors

Solution Approach 1:

The patent creates localized active sites on the catalyst surface where nickel particles are dispersed on iron-containing clay. This local concentration of catalytic activity with specific electronic and geometric properties enhances selectivity for desired products (CH4 in methanation, syngas in dry reforming) while suppressing side reactions that produce undesirable byproducts

Inventive Principle:

Principle #3Local quality

3Reliability

If high-performance catalysts are developed, then catalytic efficiency improves, but manufacturing complexity and cost increase

Engineering Contradiction:

Improvecatalytic performanceVSAvoidcatalyst production simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent employs inexpensive iron-containing clay minerals (nontronite, beidellite, saponite) as catalyst supports, which are abundant natural materials. This approach achieves high catalytic performance through simple, low-cost manufacturing processes while maintaining effective catalytic activity, avoiding the need for expensive precious metal supports or complex synthesis procedures

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The iron-containing clay minerals possess inherent high surface area and structural stability that self-support the nickel catalyst particles. This natural property of the clay support reduces the need for additional stabilizing agents or complex structural engineering, simplifying manufacturing while maintaining catalyst reliability

Inventive Principle:

Principle #25Self-service

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 catalysts exhibit high carbon dioxide conversion, high methane yields, and low carbon monoxide yields, making them effective for carbon dioxide methanation and dry reforming reactions, while also being cost-effective and easy to produce.

Implementation Method 1

treating an iron-containing clay with an acid to form an intermediate

Methodology Applied

Scientific EffectAcid treatment: Chemical Bonding

Implementation Method 2

impregnating the intermediate with nickel

Methodology Applied

Scientific EffectImpregnation: Adsorption

Implementation Method 3

catalyze a carbon dioxide methanation reaction... carbon dioxide (CO2) and hydrogen (H2) are converted to methane (CH4) and water (H2O)

Methodology Applied

Scientific EffectCatalysis: Catalysis

Implementation Method 4

catalyze dry reforming of methane and carbon dioxide to produce syngas... methane and carbon dioxide are converted to syngas, which contains hydrogen and carbon monoxide (CO)

Methodology Applied

Scientific EffectCatalysis: Catalysis

Data Source

PatentUS12209020B2Nickel-iron catalyst and methods of making and using same

Publication Date: 2025.01.28 SAUDI ARABIAN OIL CO

AI summary

A catalyst includes a derivative of an iron-containing clay which includes at least one member selected from the group consisting of a nickel-iron bimetallic structure according to XRD and a nickel-iron bimetallic oxide structure according to XRD. The catalyst can be used in various reactions, such as carbon dioxide methanation and dry reforming of methane and carbon dioxide to produce syngas.