Janus Carbon Nanoparticle Functionalization for Scalable Oil Recovery
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Solution Overview
Problem
Current nanofluids for enhanced oil recovery face challenges in fluid-fluid and fluid-rock interactions, and there is a need for sustainable methods to produce low-cost nanomaterials for improved oil recovery and waste management.
Innovation Solution
Carbon nanoparticles with hydrophilic and hydrophobic surfaces (Janus nanoparticles) are prepared from waste carbon materials like plastics and biomass, through carbonization, functionalization, and grinding, and used in enhanced oil recovery compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional nanomaterials are used in nanofluid flooding, then oil displacement capability is improved, but fluid-fluid and fluid-rock interactions are constrained
Solution Approach 1:
The patent applies local quality by creating Janus nanoparticles with asymmetric surface properties - one hemisphere is hydrophilic (water-loving) and the other is hydrophobic (water-repelling). This asymmetric surface functionality allows the particles to simultaneously interact with both water and oil phases, as well as with rock surfaces, thereby improving adaptability in fluid-fluid and fluid-rock interactions while maintaining oil recovery effectiveness
Solution Approach 2:
The invention directly implements asymmetry by synthesizing nanoparticles with non-uniform surface chemistry. The Janus structure features distinct functional groups on opposite sides of the particle, enabling differential interactions with various phases. This asymmetric design resolves the contradiction by allowing the same particle to perform multiple interaction functions that symmetric conventional nanoparticles cannot achieve
2Adaptability or versatility
If new nanomaterials are synthesized to improve interactions, then adaptability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies preliminary action by pre-functionalizing the nanoparticle surfaces during the synthesis stage itself, rather than requiring subsequent complex modification steps. The Janus structure is formed directly during nanoparticle generation through controlled chemical reactions, embedding the asymmetric functionality into the core structure. This approach simplifies the overall manufacturing process by combining structure formation and surface functionalization into a single integrated step
Solution Approach 2:
The invention utilizes parameter changes by controlling synthesis conditions (such as pH, temperature, and chemical concentrations) to directly produce nanoparticles with desired asymmetric surface properties. By adjusting these parameters during synthesis, the patent achieves complex Janus structures through relatively simple process controls, avoiding the need for multiple sequential manufacturing steps
3Ease of manufacture
If traditional waste materials are disposed of, then waste management is simplified, but environmental protection and resource reuse are compromised
Solution Approach 1:
The patent directly implements the 'blessing in disguise' principle by converting waste carbon materials (such as plastic waste and biomass residues) into valuable Janus nanoparticles for enhanced oil recovery applications. The waste materials, which would normally be disposed of as environmental pollutants, are transformed through carbonization and surface functionalization into functional nanomaterials with specific hydrophilic-hydrophobic properties. This approach simultaneously addresses waste management challenges and environmental protection goals while creating economic value
4Reliability
If complex functionalization processes are used, then nanoparticle performance is improved, but production scalability is reduced
Solution Approach 1:
The patent applies merging by combining multiple process steps into a unified synthesis approach. The Janus nanoparticle production integrates carbonization of waste material, nanoparticle formation, and surface functionalization into a coordinated process sequence that can be scaled up. By merging these operations and optimizing them to work together efficiently, the patent maintains high nanoparticle performance while enabling industrial-scale production
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 Janus nanoparticles enhance oil recovery by altering wettability and reducing interfacial tension, offering a sustainable and cost-effective solution for energy needs and waste reuse.
Implementation Method 1
functionalizing the carbon microparticles with an alkaline solution such that the carbon microparticles comprise a hydrophilic surface
Implementation Method 2
alter the wettability of the reservoir rocks
Implementation Method 3
change interfacial tension (IFT) at water-oil interface
Data Source
AI summary
A method of preparing an enhanced oil recovery composition is provided. The method includes carbonizing a waste carbon material to provide carbon microparticles having a hydrophobic surface, functionalizing the carbon microparticles with an alkaline solution such that the carbon microparticles have a hydrophilic surface, and grinding the carbon microparticles to provide carbon nanoparticles. The carbon nanoparticles have a hydrophilic surface and a hydrophobic surface. The method may further include mixing the carbon nanoparticles with an aqueous based fluid to provide an enhanced oil recovery fluid.