Hydrocracking Polyaromatics to Monoaromatics Using M/A/Zeolite Catalyst
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing processes for producing monoaromatic hydrocarbons from heavy hydrocarbon feeds with polyaromatics have high selectivity for unwanted side-products like methane and lower paraffinic hydrocarbons, such as LPG and non-aromatic C5-C9 hydrocarbons.
Innovation Solution
A hydrocracking process using a M/A/zeolite catalyst under specific conditions of ambient-40 bara pressure, 350-500 °C temperature, and a hydrogen to hydrocarbon ratio of 1-20, which promotes ring opening reactions and reduces successive cracking, thereby selectively converting polyaromatics to monoaromatic hydrocarbons with reduced production of unwanted side-products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hydrocracking processes are used to convert heavy hydrocarbon feeds with polyaromatics, then monoaromatic hydrocarbons are produced, but high selectivity for unwanted side-products like methane and lower paraffinic hydrocarbons occurs
Solution Approach 1:
The patent applies parameter changes by modifying the catalyst composition (adding element A from Group 1 or 2), adjusting reaction temperature (350-500 °C), pressure (ambient-40 bara), and hydrogen to hydrocarbon ratio (1-20) to optimize the conversion process and minimize unwanted side-products while maintaining monoaromatic production
Solution Approach 2:
The patent uses a composite catalyst system comprising a zeolite support combined with metal component M and element A, creating a multifunctional catalyst that simultaneously promotes desired ring-opening reactions while suppressing excessive cracking to unwanted side-products
2Productivity
If successive cracking reactions are promoted to increase conversion, then more monoaromatics are produced, but selectivity for non-aromatic C5-C9 hydrocarbons increases
Solution Approach 1:
The patent controls the balance between conversion and selectivity by optimizing reaction parameters (temperature, pressure, hydrogen ratio) and catalyst composition, ensuring that ring-opening reactions proceed to monoaromatics without excessive successive cracking to non-aromatic C5-C9 hydrocarbons
Solution Approach 2:
Element A acts as an intermediary in the catalyst system, moderating the cracking activity to prevent excessive successive cracking while still enabling the necessary ring-opening reactions to convert polyaromatics to monoaromatics
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 efficiently converts polyaromatic hydrocarbons to monoaromatic hydrocarbons with a significant reduction in unwanted side-products like methane and C5-C9 hydrocarbons, achieving high selectivity for monoaromatics and producing a product stream rich in BTXE (benzene, toluene, xylenes, and ethylbenzene).
Implementation Method 1
contacting said feed in the presence of hydrogen with a M/A/zeolite catalyst under hydrocracking process conditions
Implementation Method 2
M/A/zeolite catalyst
Implementation Method 3
ring opening reactions and reduces successive cracking, thereby selectively converting polyaromatics to monoaromatic hydrocarbons
Data Source
AI summary
The present invention relates to a process for producing monoaromatic hydrocarbons from a hydrocarbon feed comprising polyaromatics, the process comprising contacting said feed in the presence of hydrogen with a M/A/zeolite catalyst under hydrocracking process conditions.