Catalyst Sulfidation via Pre-Deposited Additive Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current sulfurization processes for hydrocarbon treatment catalysts in petroleum refining and petrochemicals often require high temperatures, leading to energy inefficiency and potential decomposition of sulfurization auxiliaries, and result in carbon monoxide releases, which are toxic and polluting.
Innovation Solution
A method involving the deposition of a sulfurization auxiliary on the catalyst surface prior to sulfurization, allowing for lower temperature sulfurization with a sulfur gas mixture, reducing energy consumption and minimizing auxiliary decomposition, while also significantly reducing carbon monoxide releases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature sulfurization is used to activate the catalyst, then the sulfidation process is effective, but energy consumption increases and sulfurization auxiliaries decompose
Solution Approach 1:
The catalyst is pre-carbonized by contact with hydrocarbon compounds before sulfurization to deposit carbon compounds in the pores. This preliminary carbonization creates a protective environment that enables effective sulfidation at lower temperatures, reducing energy consumption while maintaining catalyst activation effectiveness
Solution Approach 2:
The invention changes the chemical composition parameters of the catalyst by depositing specific carbon compounds (such as polycyclic aromatic hydrocarbons) before sulfurization. This parameter change modifies the catalyst's properties to enable lower temperature operation during sulfidation, thus reducing energy consumption while preserving activation effectiveness
2Reliability
If high temperature sulfurization is used to ensure complete sulfidation, then the process is effective, but sulfurization auxiliaries decompose
Solution Approach 1:
The catalyst undergoes preliminary carbonization with deposition of carbon compounds in the pores before sulfurization. This creates a protective carbon matrix that stabilizes the sulfurization auxiliaries during the sulfidation process, preventing their decomposition even when complete sulfidation is achieved
Solution Approach 2:
Carbon compounds act as an intermediary substance deposited in the catalyst pores before sulfurization. This intermediary layer protects the sulfurization auxiliaries from direct thermal degradation while still allowing the sulfidation reaction to proceed to completion
3Ease of manufacture
If conventional sulfurization is used to treat the catalyst, then the process is simple, but carbon monoxide emissions occur
Solution Approach 1:
The invention converts the potential harmful effect of carbon compounds into a benefit by using them as a protective deposit before sulfurization. The pre-deposited carbon compounds prevent auxiliary decomposition and reduce CO emissions, transforming what could be a污染源 into a protective element
Solution Approach 2:
The invention changes the chemical environment parameters by introducing carbon compounds into the catalyst pores before sulfurization. This parameter change modifies the combustion chemistry during sulfidation to reduce carbon monoxide emissions while maintaining process simplicity
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 approach enhances catalyst activity, reduces energy costs, preserves the sulfurization auxiliary, and minimizes toxic emissions, resulting in a more efficient and environmentally friendly sulfurization process.
Implementation Method 1
a method involving the deposition of a sulfurization auxiliary on the catalyst surface prior to sulfurization
Implementation Method 2
it is necessary to carry out sulfidation of the catalyst, namely a treatment of it with sulfur compounds, in order to transform the metal oxides into mixed sulfides
Data Source
AI summary
Process for sulfidation of a catalyst, comprises: at least a first step of depositing one or more sulfidation additive (I) on the catalyst surface, and at least a second step of contacting the catalyst with a sulfur gas mixture containing hydrogen and a sulfur compound, where the process does not contain any deposits of carbon sources other than (I), on the surface of the catalyst. Process for sulfidation of a catalyst comprises: at least a first step of depositing one or more sulfidation additive of formula (OH-C(=O)-C(R 1)=C(R 2)-C(=O)-OH) (I) on the catalyst surface, and at least a second step of contacting the catalyst with a sulfur gas mixture containing hydrogen and a sulfur compound, where the process does not contain any deposits of carbon sources other than (I), on the surface of the catalyst. R 1, R 2 : H (preferred) or 1-30C optionally saturated hydrocarbyl, not containing aromatic ring and optionally containing one or more heteroatom such as O, N or S.