Supermacroporous Alkali Aluminosilicate Catalyst for Hydrocarbon Processing
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Solution Overview
Problem
Hydrocarbon processing systems face challenges with catalyst deactivation and clogging due to high levels of inorganic impurities in contaminated hydrocarbon streams, leading to premature catalyst failure and reduced product quality.
Innovation Solution
The use of supermacroporous alkali aluminosilicate catalysts and adsorbents with large pores and high pore volume, optionally loaded with hydrogenation metals, to effectively filter and chemically convert inorganic impurities, protecting the hydrogenation catalyst and extending catalyst filling times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hydroprocessing catalysts are used to treat heavily contaminated hydrocarbons, then the hydrocarbon stream can be processed, but the catalyst quickly becomes deactivated and clogged by inorganic impurities
Solution Approach 1:
The patent applies preliminary action by placing a protective layer of solid particles (such as activated carbon, silica gel, alumina, or molecular sieves) above the main hydroprocessing catalyst bed. This protective layer is pre-installed to intercept and retain inorganic impurities before they reach the main catalyst, preventing catalyst deactivation and extending operational life without requiring frequent catalyst replacement or regeneration.
Solution Approach 2:
The patent uses an intermediary protective layer composed of inert solid particles that act as a mediator between the contaminated hydrocarbon feed and the sensitive hydroprocessing catalyst. This intermediary layer captures harmful inorganic substances (metals, heteroatom compounds, suspended solids) through adsorption and physical filtration, protecting the main catalyst from direct contact with poisons while allowing hydrocarbon processing to continue.
2Duration of action of moving object
If the catalyst bed is designed to handle high impurity loads, then catalyst life is extended, but the differential pressure across the bed increases due to clogging
Solution Approach 1:
The patent segments the catalyst system into two distinct functional zones: an upper protective layer made of inert solid particles that captures inorganic impurities, and a lower hydroprocessing catalyst layer that performs the actual chemical conversion. This segmentation allows each layer to specialize in its function, with the protective layer bearing the mechanical load of impurity retention while the hydroprocessing catalyst maintains optimal flow characteristics for its chemical function.
Solution Approach 2:
The protective layer serves as an intermediary that absorbs the mechanical stress of impurity accumulation through adsorption and physical trapping, preventing this stress from transferring to the hydroprocessing catalyst bed. This intermediary layer thus protects the main catalyst from both chemical poisoning and mechanical clogging, maintaining pressure differential within acceptable ranges while extending service life.
3Duration of action of stationary object
If a protective layer is added to protect the catalyst from inorganic impurities, then catalyst life is extended, but the device complexity increases
Solution Approach 1:
The patent employs porous materials such as activated carbon, silica gel, alumina, or molecular sieves as the protective layer. These materials possess high surface areas and porous structures that provide excellent adsorption capacity for inorganic impurities. The porous nature of these materials allows them to capture contaminants effectively while maintaining acceptable pressure differentials, extending catalyst life without requiring complex reactor designs or multiple separation units.
Solution Approach 2:
The patent creates a composite catalyst system combining inert protective particles with active hydroprocessing catalyst materials. This composite approach integrates the filtration and adsorption functions of the protective layer with the chemical conversion function of the hydroprocessing catalyst in a single reactor vessel, extending catalyst service life while avoiding the need for complex multi-unit processing systems.
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 solution significantly extends the operational life of hydrogenation catalysts by effectively capturing and converting inorganic impurities, preventing clogging and maintaining product quality over longer periods.
Implementation Method 1
a) in a first zone on a combination of catalyst and absorbent, consisting of supermacroporous alkali aluminosilicate, for the separation of sediments and catalyst poisons
Implementation Method 2
b) in a second zone on a hydrodemetallization catalyst, for the conversion of inorganic ingredients
Data Source
AI summary
In the process for separating sediments and catalyst poisons from hydrocarbons contaminated, in particular, with inorganic components, the contaminated hydrocarbons undergo hydrogenation in a fixed-bed reactor. The fixed-bed reactor consists primarily of Al₂O₃, SiO₂, and elements from Group 1 of the periodic table and can optionally be loaded with hydrogenation components. The contaminated hydrocarbon is passed over a bed of solid particles consisting of a combination of adsorbent and catalyst, which contains supermacroporous alkali aluminosilicate with pores ranging from 0.01 to 3 mm in diameter.