Dehydrogenation Catalyst Stability at Elevated Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dehydrogenation catalysts used in the dehydrogenation of dehydrogenatable compounds like cyclohexanone experience rapid activity decline, necessitating a catalyst with improved resistance to deactivation.
Innovation Solution
Operating the dehydrogenation process at a pressure above 50 psig (345 kPa) with a catalyst composition comprising a support, a dehydrogenation component from Groups 6 to 10 of the Periodic Table, and an inorganic base component from Group 1 and Group 2, treated with a liquid composition including a dehydrogenation component and an organic dispersant, enhances catalyst stability and selectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dehydrogenation catalyst is used under conventional conditions, then dehydrogenation activity is initially high, but catalyst activity decreases rapidly over time
Solution Approach 1:
The patent applies parameter changes by operating the dehydrogenation process at elevated pressures (above 50 psig or 345 kPa) and specific temperature ranges (250-750°C). This pressure parameter change stabilizes the catalyst structure and prevents rapid deactivation, allowing the catalyst to maintain high activity for extended periods while converting cyclohexanone to phenol
2Productivity
If dehydrogenation is performed to convert cyclohexanone to phenol, then phenol production is achieved, but catalyst selectivity and stability are compromised
Solution Approach 1:
The patent uses parameter changes by optimizing the pressure condition to above 50 psig (345 kPa) and temperature to 250-750°C. These parameter changes simultaneously enhance both the productivity of phenol production and the selectivity/stability of the catalyst, resolving the contradiction between production rate and catalyst reliability
Solution Approach 2:
The patent employs composite catalyst materials comprising support structures combined with dehydrogenation components (Groups 6-10 metals) and inorganic base components (Groups 1-2 metals). This composite structure improves catalyst selectivity for phenol production while maintaining stability under the elevated pressure conditions
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 achieves high stability and selectivity, maintaining conversion rates of 95% or more for cyclohexanone to phenol conversion, with the catalyst remaining active and selective at elevated pressures.
Implementation Method 1
contacting a feed comprising the at least one dehydrogenatable hydrocarbon under dehydrogenation conditions with a catalyst composition comprising a support and a dehydrogenation component
Data Source
AI summary
A dehydrogenation process for the dehydrogenation of at least one dehydrogenatable hydrocarbon, the process comprising contacting a feed comprising the at least one dehydrogenatable hydrocarbon under dehydrogenation conditions with a catalyst composition comprising a support and at least one dehydrogenation component wherein said conditions include a temperature of from 400° C. to 750° C. and a pressure of at least 50 psig (345 kPag).