Hydrogenation Catalyst Regeneration via Low-Temperature Oxygen
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing catalyst regeneration methods for aromatic ester hydrogenation are inefficient, particularly when substances other than water need to be removed, leading to low regeneration effects and potential catalyst damage from high temperatures.
Innovation Solution
A regeneration process using a gas flow with oxygen concentrations between 380 ppm and 9000 ppm at temperatures of 15 to 170 °C, specifically designed for catalysts with transition metals like ruthenium on carrier materials, to improve catalyst activity without causing oxidation or damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature calcination is used to remove deposits from the catalyst, then the regeneration effectiveness is improved, but the energy consumption increases and catalyst damage risk increases
Solution Approach 1:
The invention changes the temperature parameter from high temperature calcination (>200°C) to low temperature treatment (15-170°C), and introduces oxygen concentration as a new control parameter (380-9000 ppm) to achieve effective regeneration without high energy consumption
Solution Approach 2:
The invention converts the harmful effect of oxygen (which could cause oxidation damage at high concentrations) into a beneficial regenerating agent by controlling it at low concentrations (380-9000 ppm), where it effectively removes deposits without causing catalyst damage
2Reliability
If high temperature calcination is used to remove deposits from the catalyst, then the regeneration effectiveness is improved, but the catalyst damage risk increases
Solution Approach 1:
The invention changes the temperature parameter from high temperature calcination (>200°C) to low temperature treatment (15-170°C), and introduces oxygen concentration as a new control parameter (380-9000 ppm) to achieve effective regeneration without high energy consumption
Solution Approach 2:
The invention uses a partial amount of oxygen (380-9000 ppm, not pure oxygen) which is sufficient for regeneration but insufficient to cause catastrophic oxidation damage, applying just the right amount needed for the desired effect
3Object-affected harmful factors
If inert gas flushing is used to dry the catalyst, then the catalyst is protected from oxidation, but the regeneration effectiveness is too low when other substances need to be removed
Solution Approach 1:
The invention changes the gas composition parameter by introducing small amounts of oxygen (380-9000 ppm) into the gas stream, transforming it from purely inert to mildly oxidative, enabling removal of various deposits while maintaining catalyst protection through low oxygen concentration
Solution Approach 2:
The invention makes the gas stream composition dynamic and adjustable (380-9000 ppm oxygen range), allowing optimization between regeneration effectiveness and catalyst protection depending on the specific regeneration needs
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 process effectively enhances catalyst activity, allowing for more efficient core hydration operations while preventing oxidation and maintaining catalyst integrity, even at low oxygen concentrations, thus extending catalyst lifespan and operational effectiveness.
Implementation Method 1
passing a gas stream having an oxygen content of 380 ppm to 9000 ppm over the catalyst to be regenerated
Data Source
AI summary
The invention relates to a method for regenerating a catalyst used for the core hydrogenation of an aromatic compound, in particular an aromatic ester, wherein a gas stream containing a certain amount of oxygen is used for the regeneration.