Structured Catalyst for Hydrodesulfurization
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Solution Overview
Problem
Current hydrodesulfurization catalysts face challenges in maintaining catalytic activity and efficiency, particularly for heavy oils, due to aggregation of catalyst particles under thermal and fluid forces, leading to reduced performance and shorter catalyst life.
Innovation Solution
A structured catalyst with a porous zeolite-type support and embedded metal oxide nanoparticles, where the catalytic substance is located within the channels of the support, preventing aggregation and maintaining activity over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If catalyst particles are supported on or near the surface of the support, then the catalyst structure is simple and easy to manufacture, but the catalyst particles are moved by fluid forces and heat during reforming treatment, causing aggregation (sintering) between particles and decline in catalytic activity
Solution Approach 1:
The catalytic substance is embedded within the porous interior of the support structure, similar to nesting one object inside another. The support contains voids or pores where catalyst particles are positioned internally rather than on the surface, preventing them from being moved by fluid forces while maintaining catalytic function
Solution Approach 2:
The support is designed with a porous structure containing voids or channels. The catalytic substance is supported within these pores, which physically constrain the catalyst particles and prevent their movement and aggregation during reforming treatment, while still allowing reactant access to the catalytic sites
2Productivity
If catalyst particles are moved in the support by fluid forces and heat during reforming treatment, then the catalyst can interact with more reactant, but aggregation (sintering) between particles occurs, reducing catalytic activity and shortening catalyst life
Solution Approach 1:
The support structure provides different functional zones: the porous interior provides physical confinement to prevent aggregation, while the catalytic substance within the pores maintains high surface area for reactant interaction. This local differentiation of functions resolves the contradiction between mobility for productivity and stability for longevity
Solution Approach 2:
The porous support structure acts as an intermediary between the catalyst particles and the fluid reactants. It provides a stable framework that holds catalyst particles in fixed positions while still allowing efficient mass transfer of reactants to and from the catalytic sites through the porous network
3Stability of the object's composition
If catalyst particles aggregate (sinter) during reforming treatment, then the catalyst structure becomes denser, but the catalytic activity declines and catalyst life is reduced
Solution Approach 1:
The porous support structure provides pre-established physical constraints that prevent catalyst particle aggregation before it can occur. The voids or pores are designed with dimensions that confine the catalyst particles, creating a preliminary protective action against sintering that would otherwise be caused by heat and fluid forces during reforming treatment
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 structured catalyst effectively suppresses catalytic activity decline, extends catalyst life, and reduces waste, enabling efficient hydrodesulfurization of heavy oils while minimizing resource consumption.
Implementation Method 1
a support of a porous structure composed of a zeolite-type compound... the support having channels connecting with each other... the catalytic substance being present at least in the channels of the support
Implementation Method 2
A structured catalyst for hydrodesulfurization... at least one catalytic substance present in the support... used for modification of crude oils, heavy oils
Implementation Method 3
hydrodesulfurization... is a step of hydrogenating each fraction obtained by distilling crude oil on a catalyst to remove sulfur
Data Source
AI summary
Provided is a structured catalyst for hydrodesulfurization that suppresses the decline in catalytic activity and achieves efficient hydrodesulfurization. The structured catalyst for hydrodesulfurization (1) includes a support (10) of a porous structure composed of a zeolite-type compound, and at least one catalytic substance (20) present in the support (10), the support (10) having channels (11) connecting with each other, and the catalytic substance (20) being present at least in the channels (11) of the support (10).