MMO-Coated Titanium Electrodes for WSO Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional systems for removing water soluble organics from aqueous streams in industrial processes, such as those from oil and gas production, face challenges including electrode consumption, hazardous gas production, high labor and supply requirements, and corrosion issues, especially in remote facilities like offshore platforms.
Innovation Solution
An electro-oxidation system using a titanium anode with a mixed metal oxide coating, such as iridium oxide, and a titanium cathode, configured to operate with reversible polarity, reducing the need for frequent electrode replacement and minimizing hazardous gas production, and operating with lower energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electro-oxidation systems use standard electrodes, then water soluble organics can be removed from aqueous streams, but electrodes are consumed and require frequent replacement
Solution Approach 1:
The patent applies composite materials by coating titanium electrodes with mixed metal oxides (MMO), specifically iridium oxide, ruthenium oxide, tantalum oxide, and platinum oxide. This composite structure combines the corrosion resistance of titanium with the catalytic activity of metal oxides, creating an electrode that maintains high WSO removal efficiency while significantly extending service life and reducing consumption.
Solution Approach 2:
The patent addresses electrode consumption by using replaceable electrode cartridges that can be easily swapped out. This approach allows the system to maintain continuous operation by replacing consumed electrodes with pre-coated titanium electrodes, reducing downtime and maintenance complexity while keeping the overall system cost-effective.
2Productivity
If conventional systems remove WSOs from aqueous streams, then organics are separated, but acidic byproducts are generated causing corrosion
Solution Approach 1:
The patent converts the harmful acidic byproduct issue into a benefit by using MMO-coated titanium electrodes that catalyze the oxidation of WSOs to produce carbon dioxide and water instead of acidic compounds. The mixed metal oxide coating facilitates this clean oxidation pathway, transforming a potentially harmful process into an environmentally benign one.
Solution Approach 2:
The patent changes the chemical parameters of the oxidation process by using MMO-coated electrodes instead of conventional electrodes. This parameter change in electrode material composition alters the reaction pathway, preventing acid generation and eliminating corrosion issues while maintaining effective WSO removal.
3Productivity
If conventional electro-oxidation is used to remove WSOs, then organics are converted, but hazardous gases are produced
Solution Approach 1:
The patent converts the harmful hazardous gas byproduct into beneficial harmless gases by using MMO-coated titanium electrodes. These electrodes catalyze complete oxidation of WSOs to produce carbon dioxide and water vapor instead of hazardous gases, transforming a harmful emission issue into an environmentally safe process.
4Productivity
If conventional systems operate with high current and voltage to remove WSOs, then removal efficiency is maintained, but energy consumption is high
Solution Approach 1:
The patent changes the electrical parameters required for effective WSO removal by using MMO-coated titanium electrodes. The mixed metal oxide coating provides catalytic activity that lowers the overpotential for oxidation reactions, allowing the system to achieve the same or better WSO removal efficiency at significantly lower current and voltage levels, thereby reducing energy consumption.
Solution Approach 2:
The patent uses MMO-coated electrodes as catalysts that accelerate the oxidation of WSOs, enabling the reaction to proceed more efficiently at lower energy inputs. The mixed metal oxide coating enhances the electrochemical activity of the electrode surface, facilitating faster and more complete oxidation at reduced current and voltage.
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 system effectively converts water soluble organics into free oil without adding acidity, producing harmless gases, and requires less maintenance and labor, maintaining efficient operation even during maintenance, with reduced capital and operating costs.
Implementation Method 1
electro-oxidation techniques
Implementation Method 2
titanium anode comprising a mixed metal oxide (MMO) coating
Implementation Method 3
power source to apply electricity across the channel, or to the anode and/or cathode
Data Source
AI summary
Systems and methods for removing water soluble organics from an aqueous stream is provided. In one embodiments a system comprises an electro-oxidation unit comprising a titanium anode comprising a mixed metal oxide (MMO) coating, a titanium cathode, a channel between the anode and the cathode, and a power source configured to apply electricity across the channel.