Manganese-Promoted MoS2 Catalyst for Selective CO2-to-Methanol Synthesis

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Solution Overview

Problem

Existing processes for producing methanol from carbon dioxide are often non-selective, require expensive catalysts, or involve complex conditions, especially when using carbon dioxide as a starting material, and are not tolerant to sulfur compounds.

Innovation Solution

A manganese-promoted MoS2 catalyst is used for the selective hydrogenation of CO2 to methanol, which is sulfur-tolerant and operates under increased pressure and temperature conditions, optionally with a potassium promoter and a carrier like Al2O3 or AlO(OH), utilizing a two-stage reaction sequence involving a Reverse Water-Gas Shift Reaction followed by CO hydrogenation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If CO2 is used as starting material for methanol production, then availability of raw material is improved, but selectivity and yield deteriorate

Engineering Contradiction:

Improveavailability of CO2VSAvoidselectivity and yield

Core Design Contradiction:

Quantity of substanceVSManufacturing precision

Solution Approach 1:

The patent changes the chemical parameters of the catalyst by using manganese-promoted MoS2 instead of conventional catalysts. This parameter change in catalyst composition enables high selectivity (up to 90%) and yield when using CO2 as starting material, resolving the contradiction between CO2 availability and manufacturing precision.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If conventional catalysts are used for CO2 hydrogenation, then process simplicity is improved, but sulfur tolerance deteriorates

Engineering Contradiction:

Improveprocess simplicityVSAvoidsulfur tolerance

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a composite catalyst material consisting of MoS2 promoted with manganese. This composite structure combines the benefits of MoS2 (sulfur tolerance) with manganese promotion (enhanced activity and selectivity), maintaining process simplicity while achieving superior sulfur tolerance.

Inventive Principle:

Principle #40Composite materials

3Manufacturing precision

If selective CO2 hydrogenation process is implemented, then methanol selectivity is improved, but catalyst cost deteriorates

Engineering Contradiction:

Improvemethanol selectivityVSAvoidcatalyst cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent uses MoS2-based catalyst which is more cost-effective than conventional noble metal catalysts. The manganese promotion enhances selectivity to levels comparable with expensive catalysts, while the overall catalyst system remains more economical, achieving high methanol selectivity without prohibitive cost.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 process achieves high selectivity and yield of methanol with minimal formation of higher alcohols and undesirable by-products, such as CO and CH4, even in the presence of sulfur, and can utilize flue gas as a CO2 source.

Implementation Method 1

CO2 is reacted with H2 over a manganese-promoted MoS2 catalyst

Methodology Applied

Scientific EffectCatalysis: Catalysis

Implementation Method 2

selective hydrogenation of CO2 to methanol

Methodology Applied

Scientific EffectHydrogenation: Hydrogenation

Implementation Method 3

utilizing a two-stage reaction sequence involving a Reverse Water-Gas Shift Reaction followed by CO hydrogenation

Methodology Applied

Scientific EffectReverse Water-Gas Shift Reaction:

Data Source

PatentUS20260078076A1Method of manufacturing a catalyst

Publication Date: 2026.03.19 VIENNA UNIVERSITY OF TECHNOLOGY

AI summary

A process for the production of methanol (CH3OH) from carbon dioxide (CO2) and hydrogen (H2), wherein CO2 is reacted with H2 over a manganese-promoted molybdenum(IV) sulfide catalyst; as well as a catalyst for such a process and a production process for the catalyst.