Crosslinked Polystyrene Porous Medium for Hydrocarbon Varnish Removal
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Solution Overview
Problem
Hydrocarbon fluids in lubricating processes degrade, forming insoluble components that can settle and form varnish, leading to performance and safety issues in systems, with existing removal technologies only achieving moderate success.
Innovation Solution
A porous medium comprising crosslinked polystyrene with specific BET pore volume and surface area, capable of adsorbing degraded components, and a method involving multiple filter sections and regenerants to effectively remove and regenerate the medium, utilizing crosslinked polystyrene or other materials like cotton, activated carbon, or zeolites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional filtration methods (electrostatic oil cleaning, depth media filters) are used to remove degraded components, then some removal is achieved, but the removal effectiveness is only moderate and varnish deposits still form in cooler sections and on infrequently used components
Solution Approach 1:
The patent employs a porous adsorbent material with specific pore size distribution (5-50 micrometers) and surface area (500-900 m2/g) that selectively adsorbs degraded hydrocarbon components and varnish precursors. The porous structure provides high surface area for adsorption while allowing fluid flow, effectively removing degraded components that conventional filters miss.
Solution Approach 2:
The patent changes the physical parameters of the filtration medium by specifying particular pore size ranges (5-50 micrometers), surface area (500-900 m2/g), and particle size (10-40 mesh) to optimize adsorption effectiveness. These parameter changes enable the medium to capture degraded components more effectively than conventional filters.
2Reliability
If porous adsorbent material is used to effectively remove degraded components, then varnish potential is reduced, but the adsorbent capacity decreases over time requiring replacement or regeneration
Solution Approach 1:
The patent implements a regeneration process where the spent adsorbent medium is recovered and regenerated by heating to desorb accumulated degraded components. This allows the adsorbent to be reused multiple times, extending its service life and reducing waste, while maintaining effective varnish removal capability through periodic regeneration.
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
Significantly reduces varnish potential, extends hydrocarbon fluid lifetime, and minimizes contamination in lubricating systems by effectively removing degraded components and regenerating the porous medium, maintaining high adsorbent capacity and reducing operational costs.
Implementation Method 1
a first porous medium capable of adsorbing the degraded component
Data Source
AI summary
A method of removing a degraded component from a hydrocarbon fluid includes: receiving the hydrocarbon fluid from a fluid source; directing the hydrocarbon fluid to a first porous medium capable of adsorbing the degraded component to produce a purified fluid that has a reduced amount of degraded component as compared to the hydrocarbon fluid; removing the purified fluid from the first porous medium; and regenerating the first porous medium with a regenerant. The porous medium can include a crosslinked polystyrene having at least one of a BET pore volume of greater than or equal to 0.6 mL/g or a surface area of 500 to 900 m2/g, or 500 to 850 m2/g as determined in accordance with to ISO 9277:2010.