Microporous Acid Catalyst Hydrogenation for Carbon Deposit Removal
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Solution Overview
Problem
The short lifetime of solid microporous acid components in catalyst packages used for converting oxygenates to hydrocarbons leads to frequent regeneration needs, which is costly and time-consuming, as they become inactivated during the feed-to-product reaction.
Innovation Solution
Introducing a hydrogen gas stream with specific partial pressures and temperatures into the reaction zone where oxygenates are converted to hydrocarbons, extending the lifetime of the solid microporous acid components by preventing carbonaceous deposit formation and maintaining efficient conversion processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solid microporous acid components are used to convert oxygenates to hydrocarbons, then the conversion process is efficient, but the catalyst lifetime is short due to carbonaceous deposit formation
Solution Approach 1:
The patent introduces hydrogen gas to react with carbonaceous deposits (harmful factor) forming methane and water, thereby converting the harmful carbon deposits into beneficial products while cleaning the catalyst surface and extending its lifetime
Solution Approach 2:
The patent changes the chemical environment by introducing hydrogen gas with specific partial pressures (1-48 bar) and maintains temperature ranges (350-500°C) to enable in-situ gasification reactions that prevent catalyst deactivation while maintaining conversion efficiency
2Reliability
If frequent regeneration of catalyst is performed, then catalyst activity is restored, but production time is lost and costs increase
Solution Approach 1:
The patent enables continuous operation by performing catalyst regeneration in-situ within the same reactor without shutdown or removal of the catalyst, allowing the conversion process to continue uninterrupted while hydrogen removes carbon deposits
Solution Approach 2:
The catalyst performs self-regeneration by reacting with hydrogen gas introduced into the reaction zone, eliminating the need for external regeneration equipment and processes that would require production shutdown
3Reliability
If regeneration equipment and processes are implemented, then catalyst can be restored, but equipment cost and process cost increase
Solution Approach 1:
The patent combines the conversion reaction and catalyst regeneration functions into a single reactor system, where hydrogen gas serves dual purposes: as a reactant for oxygenate conversion and as a cleaning agent for catalyst maintenance, eliminating separate regeneration equipment
Solution Approach 2:
Hydrogen gas performs multiple functions simultaneously: it acts as a reactant in the oxygenate-to-hydrocarbon conversion process and as a regenerant that removes carbonaceous deposits from the catalyst, reducing the need for specialized regeneration equipment
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 approach significantly extends the lifetime of the solid microporous acid components, reducing the need for costly regeneration processes and equipment, while maintaining the efficiency of oxygenate-to-hydrocarbon conversion.
Implementation Method 1
Introducing a hydrogen gas stream with specific partial pressures and temperatures into the reaction zone where oxygenates are converted to hydrocarbons, extending the lifetime of the solid microporous acid components by preventing carbonaceous deposit formation
Implementation Method 2
contacting the feed stream and the hydrogen gas stream simultaneously with a catalyst in the reaction zone, wherein the catalyst comprises a solid microporous acid component
Data Source
Figure 1
AI summary
A process for converting oxygenates to hydrocarbons includes introducing a feed stream having at least one oxygenate into a reaction zone, and introducing a hydrogen gas stream into the reaction zone. In the reaction zone the feed stream and the hydrogen gas stream are simultaneously contacted with a catalyst, and the catalyst includes a solid microporous acid component having 8-MR to 10-MR access. The hydrogen gas stream in the reaction zone has a partial pressure from 1 bar (100 kPa) to 48 bar (4800 kPa), and the reaction zone is at a temperature from 350 °C to 500 °C.