Integrated Reactor for Activated Carbon Production
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Solution Overview
Problem
The existing methods for producing activated carbon are time-consuming and expensive, and there is a need for a more efficient and commercially viable process that also allows for the production of synthesis gas for further applications like the Fischer-Tropsch process.
Innovation Solution
An apparatus and method involving a reactor vessel with a processor and insulating barrier for controlled gas circulation, using compressed air and steam to ignite and regulate the carbonization process, maintaining specific oxygen levels, and quenching with steam to produce activated carbon efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional slow pyrolysis and multi-step activation methods are used, then activated carbon is produced, but the process is time-consuming and expensive
Solution Approach 1:
The patent combines carbonization and activation steps into a single integrated process occurring within the same reactor vessel. The carbonization chamber and activation chamber are merged into one system where biomass is first carbonized and then activated without removing the material, eliminating the time required for separate processing steps and intermediate handling.
Solution Approach 2:
The system performs preliminary carbonization of biomass before activation within the same continuous process. The carbonization step prepares the biomass by removing volatile components and forming charcoal in situ, which then immediately undergoes activation in the same reactor, eliminating the need for separate pre-processing steps.
2Productivity
If conventional charcoal production methods are used, then charcoal is produced, but the process is lengthy and takes several days
Solution Approach 1:
The patent replaces traditional slow thermal carbonization with a controlled gas-phase reaction system. Compressed air is introduced at controlled rates to facilitate rapid combustion and carbonization reactions, reducing the process from days to hours or minutes while maintaining product quality.
Solution Approach 2:
The system changes the parameters of the carbonization process by controlling oxygen concentration, temperature, and gas flow rates. By introducing compressed air at specific rates and maintaining controlled oxygen levels (1.5%-5.8%), the process achieves rapid carbonization without requiring prolonged slow heating as in conventional methods.
3Loss of energy
If synthetic gas is produced as waste during charcoal making, then it can be collected, but it requires additional processing infrastructure
Solution Approach 1:
The system uses the synthetic gas produced during carbonization and activation to fuel the process itself. The combustion chamber burns portions of the generated gas to maintain reaction temperatures, and the gas can be directed to fuel the compressor or generator, making the system self-sufficient and eliminating the need for external energy inputs or complex external processing infrastructure.
Solution Approach 2:
The patent converts the previously wasted synthetic gas into a useful fuel source. The gas that would otherwise be discarded is now burned to provide heat for the carbonization and activation processes, and can power the compressor and generator, transforming a waste product into a valuable energy resource that reduces overall system complexity.
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 enables faster, safer, and more efficient production of activated carbon, allowing for the collection of synthesis gas for fuel or use in processes like Fischer-Tropsch, enhancing the commercial viability and efficiency of carbon production.
Implementation Method 1
A first inlet conduit is formed through the processor in communication with the interior chamber of the reactor vessel for introducing a first ignition gas into the reactor vessel to ignite the feedstock
Implementation Method 2
An insulating barrier is disposed between the reactor vessel and the processor for defining a generally vertical outer gas circulating pathway between the processor and the barrier and a generally vertical inner gas circulating pathway between barrier and the reactor vessel
Implementation Method 3
Steam is added to quench the carbonization and activate the carbonized carbon based feedstock
Implementation Method 4
Activated carbon is then produced by removing hydrocarbons and materials from the opening structure of the charcoal with steaming, chemical treatment or a combination thereof
Implementation Method 5
At least one exhaust conduit communicates with the interior chamber of the reactor vessel and is formed through the processor for exhausting gas produced by the combusted feedstock within the reactor vessel through a removable catalyst bed
Data Source
AI summary
An apparatus for providing activated carbon that has a reactor vessel for containing carbon based feedstock and a processor that encloses the reactor vessel. An insulating barrier is disposed between the reactor vessel and the processor for defining generally vertical outer and inner pathways that are communicably interconnected. The reactor vessel has a gas receiving intake port in communication with the inner pathway. First and second inlet conduits are formed through the processor and into the reactor for respectively introducing a first ignition gas into the reactor to ignite the feedstock and a second gas into the first pathway. The second gas circulates through the outer and inner pathways and enters the reactor vessel through the gas receiving intake port. The exhaust gas is circulated through a catalyst chamber/cartridge/bed. At least one exhaust port discharges gas from the vessel exteriorly of the processor.