High-Chloride Aromatization Catalyst Activation for Nitrogen Removal
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Solution Overview
Problem
Existing methods for activating platinum-based aromatization catalysts in reactor systems do not effectively remove nitrogen and ammonia, leading to reduced catalytic performance, particularly in high chloride content catalysts.
Innovation Solution
A process involving contacting the supported aromatization catalyst with an inert gas stream at 300° C. to 400° C. followed by a reducing gas stream to form an activated catalyst, which includes a bound zeolite base with specific platinum, chlorine, and fluorine content, effectively removing nitrogen and ammonia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional drying and activating methods are used for high chloride aromatization catalysts, then the catalyst can be brought to operating conditions, but nitrogen and ammonia are not effectively removed, leading to reduced catalytic performance
Solution Approach 1:
The patent applies parameter changes by modifying the drying temperature to a specific range (300-400°C) and controlling the atmosphere composition during activation. These parameter changes enable effective removal of nitrogen and ammonia from high chloride catalysts while maintaining catalyst integrity and achieving optimal catalytic performance.
Solution Approach 2:
The patent employs preliminary action by performing a controlled drying step before activation to remove moisture and volatile contaminants including nitrogen and ammonia. This preliminary treatment prepares the catalyst in an optimal state for subsequent activation, preventing harmful substances from interfering with the catalytic function.
2Productivity
If high chloride content is used in the aromatization catalyst, then catalyst activity can be enhanced, but conventional activation methods fail to adequately remove nitrogen and ammonia
Solution Approach 1:
The patent utilizes parameter changes by implementing a controlled drying temperature range (300-400°C) and specific atmosphere conditions during activation. These modified parameters enable effective removal of nitrogen and ammonia from high chloride catalysts, allowing the catalyst to achieve and maintain high aromatic compound production without the detrimental effects of nitrogen and ammonia accumulation.
3Device complexity
If the catalyst is activated without proper drying at elevated temperature, then the process can be simplified, but catalytic activity is significantly reduced due to moisture and nitrogen content
Solution Approach 1:
The patent applies merging by combining the drying and activation steps into a single integrated process. By conducting drying at elevated temperature (300-400°C) in an inert or reducing atmosphere, the process simultaneously removes moisture and activates the catalyst, eliminating the need for separate drying and activation steps while achieving high catalytic activity.
Solution Approach 2:
The patent employs parameter changes by specifying a controlled temperature range (300-400°C) and atmosphere composition during the combined drying-activation process. These parameter modifications enable effective removal of moisture and nitrogen while activating the catalyst, achieving high catalytic activity without requiring complex multi-step procedures.
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 process results in an activated catalyst with improved catalytic reforming activity by significantly reducing moisture and nitrogen content, enhancing the production of aromatic compounds.
Implementation Method 1
contacting the supported aromatization catalyst with an inert gas stream in the reactor system at a drying temperature in a range from 300° C. to 400° C. to form a treated catalyst
Implementation Method 2
contacting the treated catalyst with a reducing gas stream in the reactor system to form an activated catalyst
Data Source
AI summary
Processes for activating a high-chlorine content aromatization catalyst in a reactor system include the steps of contacting the aromatization catalyst with an inert gas stream in the reactor system at a drying temperature of 300-400° C. to form a treated catalyst, and then contacting the treated catalyst with a reducing gas stream in the reactor system to form an activated catalyst. Subsequently, a hydrocarbon feed can be contacted with the activated catalyst under reforming conditions in the reactor system to produce an aromatic product.