Hydrocarbon Catalyst Sulfidation via Auxiliary Deposition
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Solution Overview
Problem
Current sulfurization processes for hydrocarbon treatment catalysts in petroleum refining and petrochemicals often require high temperatures and may not achieve optimal catalyst activity, with existing methods not fully leveraging the potential of sulfurization auxiliaries for enhanced performance.
Innovation Solution
A process involving the deposition of a sulfurization auxiliary, such as 2-hydroxy 4-methylthiobutanoic acid, on the catalyst surface before sulfurization, followed by contact with a sulfur gas mixture at lower temperatures, to enhance catalyst activity and facilitate sulfur fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional gas phase sulfurization processes are used with high H2S partial pressure and high H2S/H2 ratio, then sulfurization can be achieved, but the process requires high temperatures and does not achieve optimal catalyst activity
Solution Approach 1:
The patent applies preliminary action by depositing a sulfurization auxiliary (organic compound containing sulfur) on the catalyst surface before the actual sulfurization step. This pre-deposited auxiliary then serves as a source of sulfur during the subsequent sulfurization process, enabling effective catalyst activation at lower temperatures than conventional direct gas phase sulfurization methods.
2Reliability
If sulfurization is performed without auxiliary compounds, then the process is simpler, but catalyst activity is not optimized
Solution Approach 1:
The patent introduces a sulfurization auxiliary (organic compound) as an intermediary substance that facilitates the sulfurization process. This auxiliary compound acts as a mediator between the sulfur source and the catalyst surface, improving sulfur transfer efficiency and catalyst activation while maintaining relatively simple process conditions.
3Reliability
If high H2S partial pressure is used in gas phase sulfurization, then sulfurization proceeds, but energy consumption increases and catalyst activity is not maximized
Solution Approach 1:
The patent applies parameter changes by modifying the sulfurization approach from direct high H2S pressure gas phase treatment to a two-step process involving deposition of organic sulfur compounds followed by milder sulfurization conditions. This changes the chemical parameters and mechanism of sulfur transfer, enabling effective catalyst activation with reduced energy input.
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 results in a catalyst with higher activity and allows sulfurization to be performed at lower temperatures than traditional methods, improving the efficiency and effectiveness of hydrocarbon treatment processes like hydrodesulfurization.
Implementation Method 1
a process for the sulfurization of a hydrocarbon treatment catalyst, characterized in that a sulfurization auxiliary is deposited, in a first step, on the surface of the catalyst
Implementation Method 2
it is necessary to carry out a sulfurization of the catalyst, namely a treatment of it using sulfur compounds, with the aim of transforming the oxides metals in mixed sulphides
Data Source
AI summary
Process for sulfidation of a catalyst for hydrocarbon treatment, 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, different from (I). Process for sulfidation of a catalyst for hydrocarbon treatment, comprises: at least a first step of depositing one or more sulfidation additive of formula (R 1O-C(=O)-R 2-S-R 3) (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, different from (I). Where R 1H or a linear or branched, saturated or unsaturated, 1-30 C hydrocarbon R 2a divalent 1-30C, straight or branched, saturated or unsaturated hydrocarbon optionally containing heteroatoms such as O or N. R 3a linear or branched, saturated or unsaturated, 1-30 C hydrocarbon .