Hydrocracking Separation Zone Noble Metal Catalyst Pressure Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hydrocracking apparatuses often operate at high pressures to meet rigorous product specifications, leading to increased capital and operating costs, as well as the need for sturdier equipment, which may not be necessary for all product targets.
Innovation Solution
Incorporating a separation zone with a catalyst containing group VIII noble metals downstream of the hydrocracking zone to reduce operating pressure and achieve targeted aromatic saturation in kerosene products without increasing system pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pressure is increased to force aromatic saturation reaction, then aromatic saturation target is met, but capital cost and operating cost increase
Solution Approach 1:
The patent changes the chemical parameters by introducing a noble metal catalyst (platinum, palladium, or rhodium) to the separation zone, which enables aromatic saturation at lower pressures. This catalyst modifies the reaction kinetics, allowing the same aromatic saturation target to be achieved without increasing system pressure, thereby reducing capital and operating costs.
Solution Approach 2:
The noble metal catalyst acts as an intermediary substance that facilitates the aromatic saturation reaction. By introducing this catalyst into the separation zone, the system achieves the desired aromatic saturation through catalytic action rather than relying solely on high pressure, thus resolving the contradiction between meeting product specifications and reducing equipment costs.
2Manufacturing precision
If pressure is increased to meet kerosene smoke target, then aromatic saturation is improved, but equipment strength requirements increase
Solution Approach 1:
The introduction of noble metal catalyst changes the reaction pathway and kinetics, enabling aromatic saturation to proceed effectively at lower pressures. This parameter change (adding catalyst) allows the system to meet kerosene smoke targets without requiring equipment designed for high-pressure operation, thereby reducing strength requirements.
Solution Approach 2:
The noble metal catalyst serves as a mediator that enables the aromatic saturation reaction to occur at reduced pressures. By facilitating the reaction through catalysis rather than relying on pressure alone, the equipment strength requirements are significantly reduced while still meeting product specifications.
3Adaptability or versatility
If rigorous operation conditions are applied to meet all product specifications, then all targets are met, but operating expenses increase
Solution Approach 1:
The patent changes the operational parameters by introducing a noble metal catalyst in the separation zone, which enables aromatic saturation at lower hydrogen partial pressures. This allows the system to meet all product specifications (kerosene smoke, sulfur content, cetane number) without maintaining rigorous high-pressure operation throughout, thereby reducing hydrogen consumption and operating expenses.
Solution Approach 2:
The noble metal catalyst acts as an intermediary that enables selective aromatic saturation under milder conditions. By placing the catalyst in the separation zone rather than requiring rigorous conditions throughout the entire hydrocracking process, the system achieves versatile product specification compliance with reduced energy and material consumption.
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 allows for flexible operation to meet various product specifications, reducing capital expenditures and operating expenses while effectively reducing saturated aromatics in kerosene products.
Implementation Method 1
a separation zone can include a noble metal catalyst and receive a hydrogen stream to saturate aromatics
Implementation Method 2
The catalyst may include at least one group VIII noble metal
Data Source
AI summary
One exemplary embodiment can be a process for a hydrocarbon feed. The process can include passing a stream through a separation zone forming a void for separating one or more gases from one or more liquids and at least partially containing a catalyst. The catalyst may include at least one group VIII noble metal. Typically, the separation zone is downstream of a hydrocracking zone for reducing the operating pressure in the hydrocracking zone.