Ta-Nb Mesoporous Catalyst for Butadiene Selectivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The production of 1,3-butadiene from ethanol is hindered by moderate selectivity and high costs due to the use of expensive catalysts like tantalum, with existing methods generating significant by-products and requiring optimization to enhance productivity and reduce raw material losses.
Innovation Solution
A catalyst comprising a mesoporous oxide matrix with tantalum and niobium, where the mass of tantalum is between 0.1 and 30% and niobium is between 0.02 and 6% of the matrix, exhibiting a synergistic effect that enhances butadiene selectivity and productivity, allowing for partial substitution of tantalum and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If tantalum-based catalysts are used to produce 1,3-butadiene from ethanol, then butadiene selectivity is improved (reaching 69%), but catalyst cost increases significantly
Solution Approach 1:
The patent applies composite materials by combining tantalum oxide with niobium oxide and silica in a specific composition ratio (Ta: 0.1-30%, Nb: 0.02-6%, SiO2: balance). This composite catalyst structure allows the use of lower tantalum content while maintaining high butadiene selectivity through the synergistic effect of multiple metal oxides, thereby reducing catalyst cost while preserving manufacturing precision.
Solution Approach 2:
The patent changes the compositional parameters of the catalyst by introducing niobium oxide as a component and adjusting the tantalum oxide content within a specific range (0.1-30% by mass). This parameter modification enables the catalyst to achieve comparable or superior performance with reduced reliance on expensive tantalum, thus resolving the contradiction between selectivity and cost.
2Productivity
If existing catalysts are used for ethanol conversion, then butadiene production is achieved, but by-product formation increases and selectivity remains moderate
Solution Approach 1:
The composite catalyst comprising tantalum oxide, niobium oxide, and silica works synergistically to enhance butadiene production while suppressing by-product formation. The specific combination of metal oxides provides optimized catalytic activity for the desired reaction pathway while reducing unwanted side reactions, thereby improving productivity and minimizing harmful by-products.
Solution Approach 2:
The catalyst exhibits local quality differentiation through the specific distribution and interaction of different metal oxide components (tantalum and niobium) within the silica matrix. This localized catalytic activity enhancement at the active sites promotes selective formation of butadiene while suppressing by-product formation, improving the overall selectivity and productivity.
3Reliability
If high tantalum content is used in the catalyst, then catalytic activity and selectivity are enhanced, but catalyst cost and complexity increase
Solution Approach 1:
The patent uses composite materials with a defined composition range (Ta: 0.1-30%, Nb: 0.02-6%, SiO2: balance) to achieve reliable catalytic activity without excessive complexity. The multi-component structure provides synergistic effects that enhance reliability while the specified composition ranges prevent unnecessary complexity in catalyst preparation and characterization.
Solution Approach 2:
By changing the compositional parameters within optimized ranges and introducing niobium oxide as a co-catalyst, the patent maintains high catalytic activity and reliability while simplifying the overall catalyst system. The parameter optimization ensures that the catalyst achieves desired performance with manageable composition complexity.
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 improves butadiene selectivity and productivity while minimizing by-product formation and reducing catalyst costs, achieving comparable performance to tantalum-based catalysts with lower tantalum content, thus optimizing the economic viability of the process.
Implementation Method 1
a catalyst that comprises a mesoporous oxide matrix, with said matrix comprising at least one oxide of an element X that is selected from among silicon and titanium, taken by itself or in a mixture, with said catalyst comprising tantalum and niobium
Data Source
AI summary
The invention relates to a catalyst that comprises a mesoporous oxide matrix, with said matrix comprising at least one oxide of an element X that is selected from among silicon and titanium, taken by itself or in a mixture, with said catalyst comprising at least the tantalum element and the niobium element, with the tantalum mass representing between 0.1 to 30% by weight of the mass of the mesoporous oxide matrix, the niobium mass representing between 0.02 to 6% by weight of the mass of the mesoporous oxide matrix, the content by mass of the tantalum element being greater than or equal to the content by mass of the niobium element. The invention also relates to the use of this catalyst in a method for the production of 1,3-butadiene from a feedstock that comprises at least ethanol.