Zeolite Composite Catalyst for Light Olefin Yield
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Solution Overview
Problem
The petrochemical industry faces challenges in producing light olefins such as ethylene, propylene, and butene due to the limitations and high costs associated with traditional thermal cracking processes using petroleum gases and distillates, necessitating the development of new catalyst systems for converting lighter hydrocarbon feedstocks like gas condensate into these intermediates with higher yields.
Innovation Solution
A cracking catalyst system comprising a combination of *BEA, FAU, and MFI framework type zeolites, along with binder and matrix materials, is used to convert hydrocarbon feed streams with high API gravity, specifically including zeolite Beta, zeolite Y, and ZSM-5, to enhance the yield of light olefins and gasoline octane number, with the zeolites being formulated to minimize transition metal content and optimize phosphorus content for improved catalytic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional thermal cracking processes are used to produce light olefins, then the process is well-established and reliable, but the feedstock costs are high and processing steps are costly and energy intensive
Solution Approach 1:
The patent changes the chemical parameters of the cracking process by using zeolite catalysts with specific pore structures (*BEA, FAU, and MFI frameworks) and controlled transition metal content (less than 1 wt.%). This catalytic approach modifies the reaction pathway to achieve lighter feedstock conversion with reduced energy requirements compared to traditional thermal cracking
Solution Approach 2:
The invention employs a composite catalyst system combining multiple zeolite types (*BEA, FAU, and MFI frameworks) with binder materials and matrix materials. This composite catalyst structure synergistically enhances cracking efficiency for light hydrocarbon feedstocks, enabling effective conversion with lower energy input than conventional single-catalyst or thermal processes
2Quantity of substance
If refinery FCC processes are used to produce propylene, then intermediate compounds can be produced, but the feedstocks are limited and require several costly processing steps
Solution Approach 1:
The patent modifies the feedstock parameter by accepting lighter hydrocarbons (API gravity of at least 40 degrees, including gas condensate) directly as feedstock, eliminating the need for multiple preprocessing steps required by conventional FCC processes that use heavier gas oils or residues
Solution Approach 2:
The invention applies localized catalytic activity within the catalyst particle structure, where the zeolite active sites are strategically positioned within the binder and matrix material framework. This creates optimized local reaction zones that enhance conversion efficiency of light feedstocks to propylene and other intermediates in a single processing step
3Device complexity
If conventional cracking catalysts are used, then the catalyst structure is simple, but the yield of light olefins from light hydrocarbon feedstocks is insufficient
Solution Approach 1:
The patent employs a composite catalyst system combining multiple zeolite types (*BEA, FAU, and MFI frameworks) with binder materials and matrix materials. This composite catalyst structure synergistically enhances cracking efficiency for light hydrocarbon feedstocks, enabling effective conversion with lower energy input than conventional single-catalyst or thermal processes
Solution Approach 2:
The invention applies localized catalytic activity within the catalyst particle structure, where the zeolite active sites are strategically positioned within the binder and matrix material framework. This creates optimized local reaction zones that enhance conversion efficiency of light feedstocks to propylene and other intermediates in a single processing step
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 catalyst system significantly increases the yield of light olefins and gasoline octane from lighter feedstocks, offering a more efficient and cost-effective method for producing petrochemical intermediates compared to traditional processes.
Implementation Method 1
systems and method for the cracking of hydrocarbon streams by zeolite-containing catalyst systems
Data Source
Figure 1
Figure 2
AI summary
A hydrocarbon feed stream may be cracked by a method including contacting the hydrocarbon feed stream with a cracking catalyst in a reactor unit. The hydrocarbon feed stream has an API gravity of at least 40 degrees. The cracking catalyst may include one or more binder materials, one or more matrix materials, *BEA framework type zeolite, FAU framework type zeolite, and MFI framework type zeolite.