Precious Metal-Supported Eggshell Catalyst for Lower-Cost 3-HPA Hydrogenation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing precious metal-supported catalysts for hydrogenating 3-hydroxypropionaldehyde to 1,3-propanediol exhibit low activity, short service life, and high cost, limiting their effectiveness and economic viability in industrial production.
Innovation Solution
A precious metal-supported eggshell catalyst with an eggshell design and a promoter metal evenly distributed on the carrier surface, enhancing the catalyst's activity, selectivity, and service life through a synergistic effect between the precious metal and promoter, allowing for a continuous fixed bed hydrogenation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If precious metal-supported catalysts are used for hydrogenating 3-hydroxypropionaldehyde to 1,3-propanediol, then the catalytic activity and service life are improved, but the preparation cost increases due to high precious metal content
Solution Approach 1:
The patent applies local quality by creating an eggshell catalyst structure where the active precious metal components are concentrated on the outer surface of the carrier particles, while the inner core contains different material composition. This localized distribution of catalytic activity on the particle surface maximizes the utilization of precious metals, reducing overall metal content while maintaining high catalytic performance and service life.
Solution Approach 2:
The patent uses composite materials by combining a ceramic or metal oxide carrier with precious metal nanoparticles in an eggshell configuration. The composite structure integrates the mechanical strength and thermal stability of the carrier with the high catalytic activity of the precious metal surface, achieving both improved service life and reduced precious metal consumption through optimized surface area utilization.
2Productivity
If precious metal content in the catalyst is increased to achieve high conversion rate of 3-HPA, then the catalytic activity is improved, but the catalyst cost increases
Solution Approach 1:
The eggshell catalyst structure concentrates precious metal active sites on the outer surface where reactant contact occurs, creating local high-density catalytic zones. This localized quality distribution ensures high conversion rates are achieved with minimal precious metal content, as the active surface area is maximized without increasing bulk metal loading.
Solution Approach 2:
The patent utilizes porous carrier materials with optimized pore structures that facilitate reactant diffusion to the outer surface active sites. The porous architecture increases the effective surface area for catalysis, enabling high conversion rates with lower precious metal content by improving mass transfer efficiency and maximizing the utilization of surface-exposed metal sites.
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 conversion rates and selectivity of 1,3-propanediol with reduced precious metal usage, lower preparation costs, and extended service life, suitable for industrial-scale production.
Implementation Method 1
hydrogenation of 3-hydroxypropionaldehyde to 1,3-propanediol
Implementation Method 2
precious metal-supported eggshell catalyst for preparing 1,3-propanediol through hydrogenation of 3-hydroxypropionaldehyde
Data Source
AI summary
A precious metal-supported eggshell catalyst with a preparation method and an application are provided. The precious metal-supported eggshell catalyst includes a carrier, a precious metal and a promoter. As an active component, the precious metal and the promoter are evenly distributed on surface of the carrier, wherein the promoter includes one or more than two of a precious metal, an alkaline earth metal, a transition metal lanthanide series metal, an actinium series metal and/or a metal oxide thereof. With a highly utilization of the precious metal, the precious metal-supported eggshell catalyst showed high conversion, good selectivity and excellent stability, and the precious metal-supported eggshell catalyst is used more than 300 hours with no obvious loss of activity in preparing 1,3-propanediol through hydrogenation of 3-hydroxypropionaldehyde aqueous solution. Furthermore, with large particles the precious metal-supported eggshell catalyst is easily separated from reaction products.