Copper-Zinc Alloy Catalyst for Low-Carbon Alcohol Synthesis
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Solution Overview
Problem
Current catalysts for synthesizing low-carbon alcohols from synthesis gas require additives or carriers, which are costly and not conducive to industrialization, and existing copper alloys, such as Cu—Co bimetallic alloy catalysts, face challenges with carbon chain growth and separation of products.
Innovation Solution
A copper-zinc alloy catalyst is developed without the need for additives or carriers, where the copper-zinc alloy particles are pretreated and optionally subjected to partial dezincification to enhance the specific surface area and catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Rh-based catalysts are used, then selectivity to low-carbon alcohol is high and reaction conditions are mild, but cost is high due to noble metal usage
Solution Approach 1:
The patent replaces expensive noble metal Rh-based catalysts with inexpensive Cu-Zn alloy catalysts. The Cu-Zn alloy achieves comparable or superior catalytic performance without requiring costly rare earth additives or carriers, making the catalyst economically viable for industrialization while maintaining high selectivity to C2+ alcohols
Solution Approach 2:
The patent modifies the catalytic system by changing the metal composition parameters from Rh-based to Cu-Zn-based alloy. This parameter change enables the catalyst to achieve high selectivity to low-carbon alcohols under mild reaction conditions while dramatically reducing cost, as Cu and Zn are abundant metals compared to rare earth metals and noble metals
2Reliability
If Mo-based catalysts are used, then resistance to sulfur and resistance to carbon deposition is high, but reaction conditions are harsh and sulfide removal is difficult
Solution Approach 1:
The patent changes the catalyst composition from Mo-based to Cu-Zn-based alloy. This parameter change allows the catalyst to operate under milder reaction conditions (lower temperature and pressure) while maintaining good resistance to sulfur and carbon deposition. The Cu-Zn alloy system achieves this balance without requiring harsh reaction conditions, making product sulfide removal easier and more economical
3Productivity
If modified F-T synthesis catalysts are used, then carbon chain growth ability is strong, but product distribution is wide and separation is difficult
Solution Approach 1:
The patent adjusts the catalytic system by using Cu-Zn alloy instead of modified F-T synthesis catalysts. This parameter change enables the catalyst to achieve strong carbon chain growth ability while producing products with narrower distribution. The Cu-Zn alloy system provides excellent selectivity to C2+ alcohols, making product separation easier and more economical compared to the wide distribution of products from F-T catalysts
4Productivity
If modified high-temperature Zn—Cr catalyst is used, then reaction activity is high, but reaction temperature and pressure are high resulting in high energy consumption
Solution Approach 1:
The patent replaces high-temperature Zn-Cr catalysts with Cu-Zn alloy catalysts. This parameter change enables the catalyst to achieve high reaction activity under much milder conditions. The Cu-Zn alloy system maintains high catalytic performance while operating at lower temperatures and pressures, dramatically reducing energy consumption and making industrialization more feasible
5Ease of manufacture
If Cu-based catalysts without additives are used, then cost is low and reaction conditions are mild, but yield of low-carbon alcohol is low
Solution Approach 1:
The patent creates a composite Cu-Zn alloy catalyst system that combines the advantages of both copper and zinc. This composite material achieves high yield of low-carbon alcohol while maintaining low cost and mild reaction conditions. The synergistic effect of Cu and Zn in the alloy provides both the catalytic activity needed for high yield and the cost-effectiveness of using abundant metals without requiring expensive additives or carriers
6Productivity
If Cu—Co bimetallic alloy catalyst is used, then catalytic activity is improved, but carbon chain growth ability is strong making product separation difficult
Solution Approach 1:
The patent changes the alloy composition from Cu-Co to Cu-Zn. This parameter change maintains high catalytic activity while improving product separability. The Cu-Zn alloy system provides excellent selectivity to C2+ alcohols with narrower product distribution compared to Cu-Co catalysts, making separation easier and more economical while retaining strong catalytic performance
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 copper-zinc alloy catalyst achieves a CO conversion rate of 20.86% and a C2+ alcohol selectivity of 62.78%, demonstrating excellent catalytic performance and industrialization potential.
Implementation Method 1
the copper-zinc alloy catalyst achieves a CO conversion rate of 20.86% and a C2+ alcohol selectivity of 62.78%, demonstrating excellent catalytic performance
Implementation Method 2
subjecting the copper-zinc alloy particles to ultrasonic cleaning by using an organic solvent, ultrasonic cleaning by using heated deionized water
Data Source
AI summary
Provided are a copper-zinc alloy catalyst, and a preparation method and use thereof. The method for preparing the copper-zinc alloy catalyst includes: subjecting copper-zinc alloy particles to pretreatment to obtain the copper-zinc alloy catalyst; alternatively, subjecting copper-zinc alloy particles to pretreatment and partial dezincification in sequence to obtain the copper-zinc alloy catalyst.