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, particularly in high chloride content catalysts, affecting their catalytic performance.
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 moisture, 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, affecting 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 composition of gas streams (inert gas followed by reducing gas) to effectively remove nitrogen and ammonia from high chloride aromatization catalysts, thereby resolving the contradiction between achieving operating conditions and removing harmful substances
Solution Approach 2:
The patent converts the harmful effect of nitrogen and ammonia presence into a benefit by using a two-stage gas treatment process where an inert gas stream first removes moisture and then a reducing gas stream removes nitrogen and ammonia, transforming the harmful atmosphere into a controlled activation process that improves catalytic performance
2Productivity
If the catalyst is activated without proper drying and nitrogen removal, then the activation process is simpler and faster, but the catalytic activity and selectivity are compromised
Solution Approach 1:
The patent applies preliminary action by performing a structured two-stage drying and activating process before introducing hydrocarbon feed. The first stage with inert gas removes moisture, and the second stage with reducing gas removes nitrogen and ammonia, preparing the catalyst in advance to ensure optimal activity and selectivity when production begins
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 effectively removing nitrogen and ammonia, enhancing the catalyst's performance in aromatization processes.
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
Implementation Method 3
The catalytic conversion of non-aromatic hydrocarbons into aromatic compounds, often referred to as aromatization or reforming, is an important industrial process
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.