Gallium Aluminosilicate Catalyst for Aromatic Hydrocarbon Yield
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Solution Overview
Problem
Conventional catalytic reforming processes struggle to produce aromatic hydrocarbons at high yields from light hydrocarbons with 7 or fewer carbon atoms due to low conversion rates and inefficient heat supply, leading to decreased octane numbers and limited usage in petrochemical applications.
Innovation Solution
A process involving a catalyst composition of gallium-containing crystalline aluminosilicate with multiple reaction layers in series, where the catalyst amount in the first stage reaction layer is 60/n percent by volume or less, and heating means are arranged between or within the layers, optimizing the aromatic yield through temperature and catalyst filling adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional catalytic reforming processes are used with light hydrocarbons having 7 or fewer carbon atoms, then the process can operate with existing technology, but the conversion rate to aromatic hydrocarbons decreases resulting in low yield
Solution Approach 1:
The patent changes the catalyst composition parameters by using gallium-containing crystalline aluminosilicate instead of conventional platinum/alumina catalysts, and optimizes the catalyst amount distribution across multiple reaction layers (first layer: 60/n percent by volume or less of total catalyst amount). This parameter change enables high conversion rates and aromatic yields with light hydrocarbons having 7 or fewer carbon atoms.
2Temperature
If the reaction layers are efficiently supplied with heat, then the endothermal reforming reaction can proceed, but the device complexity increases due to multiple heating means
Solution Approach 1:
The patent embeds heating means within the reaction layers themselves rather than placing them externally between layers. This nesting approach provides efficient heat supply to the endothermal reforming reaction while minimizing device complexity, as the heating elements are integrated into the catalyst structure.
3Productivity
If multiple reaction layers are arranged in series with optimized catalyst distribution, then aromatic yield increases significantly, but the device complexity increases
Solution Approach 1:
The patent divides the catalytic reforming process into multiple reaction layers arranged in series, with each layer containing optimized amounts of gallium-containing crystalline aluminosilicate catalyst. The first reaction layer contains 60/n percent by volume or less of the total catalyst amount, creating segmented zones that progressively convert light hydrocarbons to aromatic hydrocarbons, thereby significantly increasing aromatic yield.
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
Significantly increases the yield of aromatic hydrocarbons in the effluent, enhancing the production of high-octane gasoline and aromatic hydrocarbons, overcoming the limitations of conventional processes by maintaining a higher aromatic yield and efficiency.
Implementation Method 1
bringing a feedstock containing mainly a light hydrocarbon having 2 to 7 carbon atoms into contact with a catalyst composition comprising at least a gallium-containing crystalline aluminosilicate
Implementation Method 2
These catalytic reforming processes are large endothermal reactions and thus fail to proceed with the reaction because the reaction temperature decreases unless the reaction layers are efficiently supplied with heat
Data Source
Figure 1~2
AI summary
The present invention provides a process for producing aromatic hydrocarbons at a sufficiently high yield, from a light hydrocarbon containing mainly hydrocarbons having 7 or fewer carbon atoms. The process of the present invention comprises bringing a feedstock containing mainly light hydrocarbons having 2 to 7 carbon atoms into contact with a catalyst composition comprising at least a gallium-containing crystalline aluminosilicate wherein a reaction step for converting the feedstock to aromatic hydrocarbons comprises at least two or more reaction layers formed of the catalyst composition, arranged in series and heating means arranged either between or in the reaction layers, the amount of the catalyst in the first stage reaction layer is 30 percent by volume or less of the total catalyst volume, and/or the yield of the aromatics in the product outflowing from the first reaction layer is from 0.5 to 30 percent by mass.