Platinum Catalyst Pre-treatment for Propane Dehydrogenation
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Solution Overview
Problem
Current catalysts used for propane dehydrogenation, such as alumina-supported platinum-tin catalysts, are susceptible to coke deposition and deactivation, requiring frequent regeneration and increasing operational costs, while existing processes do not improve catalyst stability effectively.
Innovation Solution
A process involving a platinum-containing catalyst supported on a material, treated with an atmosphere of carbon-containing agents and hydrogen at specific temperatures to enhance stability and selectivity for converting propane to propylene, resulting in a catalyst that maintains high activity and selectivity for over 400 hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alumina-supported platinum-tin catalysts are used for propane dehydrogenation, then high activity and selectivity are achieved, but the catalyst is susceptible to coke deposition and deactivation requiring frequent regeneration
Solution Approach 1:
The catalyst undergoes preliminary treatment with carbon-containing agents (such as acetylene or ethylene) and hydrogen at elevated temperatures (50-500°C) before being used in propane dehydrogenation. This pre-treatment modifies the catalyst surface to create a more stable structure that resists coke deposition during subsequent operation, thereby extending catalyst life and reducing regeneration frequency
Solution Approach 2:
The invention changes the chemical and physical parameters of the catalyst through controlled exposure to carbon-containing atmospheres and hydrogen at specific temperature ranges. This parameter modification transforms the catalyst's surface properties, enhancing its resistance to deactivation while maintaining its dehydrogenation activity
2Reliability
If frequent catalyst regeneration is performed to maintain activity, then catalytic performance is sustained, but operational costs increase
Solution Approach 1:
By performing preliminary treatment of the catalyst with carbon-containing agents before deployment, the catalyst is pre-conditioned to resist coke formation. This advance preparation reduces the frequency and cost of regeneration operations, lowering overall operational expenses while maintaining catalytic performance
3Ease of manufacture
If conventional catalysts are used without treatment, then the process is simple, but catalyst stability is poor leading to rapid deactivation
Solution Approach 1:
The catalyst undergoes a preliminary treatment step with carbon-containing agents and hydrogen at moderate temperatures before being used in propane dehydrogenation. This pre-treatment, while adding a process step, significantly extends catalyst lifetime by preventing rapid deactivation, thereby improving the duration of catalyst action
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 treated catalyst exhibits unprecedented stability and high selectivity (>99%) during long-term runs, reducing propane consumption and reaction downtime, thereby minimizing operational costs.
Implementation Method 1
converting propane to propylene in the presence of the treated platinum-containing catalyst on a support
Implementation Method 2
treating the platinum-containing catalyst on a support material with an atmosphere comprising 0.01 to 100% carbon-containing agents and 0-100% hydrogen at a temperature of 50 to 500° C.
Data Source
AI summary
The present invention relates to a process of producing a metal-containing catalyst. The process involves mixing a support material with one or more metals in a solution to produce a catalyst comprising a metal-loaded support. The catalyst comprising a metal-loaded support is treated with an atmosphere comprising 0.01 to 100% carbon-containing agents and 0-100% hydrogen at a temperature of 50 to 500° C. to produce a treated metal-containing catalyst on a support. Also disclosed is the resulting treated metal-containing catalyst and its use in a process for converting propane to propylene.