Photo-Reactor Partial Oxidation with Ceramic Foam Buffer
Solution Overview
Problem
Conventional systems for partial oxidation using thermal plasma torches suffer from inefficiencies due to unreacted fuel, reactor wall deterioration, and reduced efficiency when attempting to cool the walls, and have not achieved high conversion rates of fuel to gas at atmospheric pressure, low temperatures, and low energy consumption.
Innovation Solution
A process involving a photo-reactor with a circulating vortex of incoming fluid, ionised gas, and catalysts, which induces expansive turbulence and photocatalysis, achieving partial oxidation of carbon atoms at temperatures below 750°C, holding times under 10 seconds, and energy consumption under 1 kWh/kg of carbon, with a conversion rate of over 80% to carbon monoxide and hydrogen or carbon dioxide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the plasma torch is placed close to the reactor wall to improve fuel conversion efficiency, then the conversion rate increases, but the reactor wall suffers accelerated deterioration due to high temperature
Solution Approach 1:
A ceramic foam layer is introduced as an intermediary between the plasma torch and the reactor wall. This foam acts as a thermal buffer that protects the wall from direct high-temperature exposure while still allowing the plasma to effectively process the fuel. The foam absorbs and distributes the thermal load, preventing localized overheating and wall deterioration.
Solution Approach 2:
The reactor structure is differentiated into zones with different thermal properties. The region near the plasma torch uses heat-resistant ceramic foam with high thermal stability, while other regions use standard reactor materials. This localized adaptation allows the system to tolerate high temperatures where needed while maintaining overall structural integrity.
2Temperature
If the incoming fluid circulates at greater speed to cool down the reactor walls, then wall deterioration is prevented, but the unreacted fuel percentage increases and process efficiency decreases
Solution Approach 1:
The ceramic foam serves as a thermal intermediary that decouples the plasma torch temperature from the reactor wall temperature. This allows the wall to remain cool without requiring high fluid circulation speeds, as the foam itself absorbs and manages the thermal load between the hot plasma and the cooler wall structure.
Solution Approach 2:
The ceramic foam is designed as a sacrificial protective layer that can be replaced periodically. It absorbs the thermal stress and deterioration that would otherwise affect the expensive reactor wall, allowing the system to maintain efficient operation without compromising wall integrity.
3Temperature
If conventional systems use thermal plasma torches for partial oxidation, then high temperature processing is achieved, but energy consumption increases and conversion rates remain limited at atmospheric pressure
Solution Approach 1:
The system optimizes plasma parameters including gas composition (using hydrogen-rich fuels), power density, and residence time to achieve effective partial oxidation at lower temperatures. By adjusting these parameters, the process achieves high conversion rates at atmospheric pressure without requiring the extremely high temperatures of conventional plasma systems, thereby reducing energy consumption.
Solution Approach 2:
Ceramic foam with controlled porosity is used to enhance heat distribution and fuel-oxidant mixing. The porous structure increases the surface area for reactions and improves mass transfer, allowing the process to achieve high conversion rates at lower temperatures and reduced energy input compared to conventional dense-reactor plasma systems.
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 process optimizes fuel reforming by achieving high conversion efficiency with homogeneous molecular distribution and photocatalytic effects, reducing energy consumption and extending reactor lifespan, while maintaining low operating temperatures and pressures.
Implementation Method 1
at least one generator to produce ionised gas, preferably a thermal plasma generator
Implementation Method 2
the non-transferred electric arc based on direct current or the induction based on alternating current
Implementation Method 3
photo-reactor, preferably tubular, on the inside walls of which is a fixed bed containing at least one type of catalyst, and throughout its central part a circulating fluid-bed with an ionised gas stream preferably projecting ultraviolet light
Implementation Method 4
ionised gas stream preferably projecting ultraviolet light
Implementation Method 5
at least one heat exchanger
Implementation Method 6
at least one protonator (proton donor) for the oxidising fluid
Data Source
AI summary
The invention comprises a process for obtaining a gas from a fluid fuel and an oxidising fluid, said process comprising steps in which the incoming fluid is subjected to temperature, photocatalytic action and reaction with catalysts, all this within a device with a tubular structure which the incoming fluid circulates through in a spiral manner, between a fixed bed attached to the walls of the duct and a circulating bed with an ionised gas stream that occupies a central position of the duct, producing a gas obtained.