Acetone Synthesis from Ethanol With Oxygen-Controlled Catalyst Feed
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Solution Overview
Problem
Existing methods for producing acetone from ethanol and water are unable to stably maintain a high space time yield.
Innovation Solution
The method involves using a reactant gas containing ethanol, water, and oxygen at specific concentrations, along with a catalyst comprising transition and rare earth elements, to facilitate a reaction at controlled temperatures and pressures, optimizing conditions such as molar ratios and vaporization energy to enhance stability and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional catalysts (iron-zirconium or iron-zinc-alkali metal) are used to synthesize acetone from ethanol and water, then the reaction can proceed, but the space time yield is low and stability is poor
Solution Approach 1:
The invention changes the chemical composition parameters of the catalyst system by introducing copper and zinc in specific ratios (Cu: 0.1-5 wt%, Zn: 1-20 wt%) combined with iron and zirconium, and adjusts reaction parameters including oxygen concentration (0.1-10 mol%), temperature (250-600°C), and water-to-ethanol ratio (0.5-10). These parameter optimizations enable both high productivity and stable operation.
Solution Approach 2:
The invention employs a composite catalyst system combining multiple metal elements (Cu, Zn, Fe, Zr) with specific functional assignments: Cu serves as the primary active site for acetone formation, Zn modifies the catalyst structure and enhances stability, Fe provides additional catalytic activity, and Zr acts as a structural promoter. This composite approach achieves synergistic effects that conventional single-component catalysts cannot attain.
2Productivity
If higher reaction temperature is used to increase reaction rate, then productivity improves, but catalyst degradation and energy consumption increase
Solution Approach 1:
The invention optimizes the temperature parameter to a specific range (250-600°C) where the catalytic activity is maximized while energy consumption remains controlled. The copper-zinc-iron-zirconium catalyst system exhibits peak activity within this temperature window, allowing high reaction rates without excessive energy input. Operating outside this range reduces efficiency.
3Productivity
If oxygen concentration is increased to improve reaction efficiency, then acetone yield increases, but safety risks and unwanted side reactions increase
Solution Approach 1:
The invention precisely controls oxygen concentration within the range of 0.1-10 mol%, which is sufficient to maintain high acetone yield through the oxidation step in the reaction mechanism, while remaining below the thresholds that would cause dangerous combustion or excessive side reactions. This optimized parameter balance achieves productivity with acceptable safety profiles.
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
This approach enables stable production of acetone with a high space time yield, reducing costs and preventing catalyst degradation.
Implementation Method 1
synthesizing acetone by contacting ethanol with water in the presence of a catalyst
Implementation Method 2
using a reactant gas containing ethanol, water, and oxygen as a starting material
Data Source
AI summary
The objective of the present invention is to provide a method for stably producing acetone using ethanol and water as starting materials while maintaining a high space time yield. The method for producing acetone comprises a step of synthesizing acetone by contacting ethanol with water in the presence of a catalyst, wherein the step of synthesizing acetone uses a reactant gas containing ethanol, water, and oxygen as a starting material, with the reactant gas having an oxygen concentration of 0.1 mol % to 10 mol %.