Hydrogenation Catalyst via Organic Complexing Agent Calcination
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Solution Overview
Problem
Current hydrogenation catalysts face challenges with low catalytic activity and short service life due to weak interaction between active components and carriers, leading to reduced performance under high temperature and pressure conditions.
Innovation Solution
A process involving the use of organic complexing agents during impregnation steps, followed by calcination, to enhance the dispersion and bonding of metal compounds on the carrier, forming a more active and stable catalyst phase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional impregnation method is used, then manufacturing simplicity is maintained, but catalytic activity is insufficient
Solution Approach 1:
An organic complexing agent is introduced as an intermediary substance during the impregnation process. This agent forms a complex with the metal compound, enabling controlled deposition on the carrier surface. The complexing agent mediates between the metal compound and carrier, improving dispersion and interaction strength, thereby enhancing catalytic activity without excessive process complexity
Solution Approach 2:
The invention changes the chemical parameters of the impregnation process by using organic complexing agents and controlling the carbon content through calcination. By adjusting the carbon content to ≤1% and optimizing the complexing agent selection, the metal compound achieves better dispersion and stronger bonding on the carrier, significantly improving catalytic activity
2Manufacturing precision
If complexation-impregnation method with low temperature drying is used, then dispersion is improved, but service life is reduced due to weak interaction
Solution Approach 1:
The invention changes the carbon content parameter through controlled calcination to ≤1%, which strengthens the interaction between metal and carrier. This parameter adjustment maintains the dispersion benefits while preventing metal accumulation and degradation, thereby extending catalyst service life under high temperature and pressure conditions
Solution Approach 2:
The calcination step is performed as a preliminary action before the catalyst enters service. This pre-treatment removes excess carbon and strengthens the metal-carrier bonding in advance, preparing the catalyst for long-term operation under harsh conditions, thus extending its service life
3Stability of the object's composition
If strong interaction between active component and carrier is used, then stability is improved, but catalytic activity is reduced due to poor dispersion
Solution Approach 1:
The organic complexing agent acts as a mediator that enables both good dispersion and strong interaction simultaneously. It facilitates uniform distribution of metal compounds on the carrier while the controlled carbon content ensures strong bonding, resolving the contradiction between dispersion and interaction strength
Solution Approach 2:
The catalyst system forms a composite structure with organic complexing agents and metal compounds on the carrier. This composite approach allows the system to achieve both good dispersion (from the complexing agent) and strong interaction (from the controlled carbon content), resulting in both stability and high catalytic activity
4Ease of manufacture
If no calcination process is used, then process simplicity is maintained, but metal accumulation occurs leading to reduced activity
Solution Approach 1:
The invention introduces a controlled calcination process that adjusts the carbon content to ≤1%. This parameter control prevents metal accumulation while maintaining reasonable process simplicity. The calcination step is optimized to be efficient and targeted, removing only the necessary excess carbon without excessive complexity
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 significantly improves catalytic activity and extends the service life of hydrogenation catalysts by promoting uniform dispersion and stronger bonding between metal and carrier, resulting in enhanced hydrodesulfurization and hydrodenitrogenation performance.
Implementation Method 1
the dispersion of metal can be improved
Implementation Method 2
the calcination after the first impregnation step can convert the metal compound into a metal oxide
Implementation Method 3
hydrogenation catalysts are the key point of this type of hydrogenation technology
Data Source
AI summary
The present application relates to a hydrogenation catalyst, a process for producing the same and application thereof in the hydrotreatment of feedstock oil. The process comprises at least the following steps: (1) contacting a first active metal component and a first organic complexing agent with a carrier to obtain a composite carrier; (2) calcining the composite carrier to obtain a calcined composite carrier having a total carbon content of 1% by weight or less; and (3) contacting a second organic complexing agent with the calcined composite carrier to obtain the hydrogenation catalyst. The hydrogenation catalyst has both excellent hydrodesulfurization activity and hydrodenitrogenation activity, and exhibits a significantly prolonged service life.