Catalytic Moving Bed Filter for Pyrolysis Oil Upgrading
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for upgrading pyrolysis oils to transportation fuels face challenges due to high hydrogen consumption, high pressures, rapid catalyst degradation, and frequent regeneration or replacement, especially in biomass gasification and pyrolysis plants, where catalysts like CoMo/Al2O3 are inefficient and HZSM-5 degrades at high temperatures.
Innovation Solution
A moving granular bed filter system that integrates a catalyst, allowing for simultaneous contaminant removal and chemical reaction, using compatible filter materials like sand or gravel with catalysts such as CoMo/Al2O3, NiMo/Al2O3, or HZSM-5 zeolite, which can be absorbed, adsorbed, or covalently bonded to the filter media, facilitating chemical alterations in the fluid stream.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional catalysts like CoMo/Al2O3 are used for pyrolysis oil upgrading, then hydrogenation reactions can proceed, but hydrogen consumption is high and catalyst degradation is rapid
Solution Approach 1:
The patent combines a moving bed filter system with catalytic functionality by incorporating catalyst particles into the filter media. This merging allows simultaneous filtration and catalytic upgrading of pyrolysis oil, eliminating the need for separate treatment units and reducing overall hydrogen consumption while maintaining continuous operation.
Solution Approach 2:
The patent employs a moving bed filter where the filter media continuously circulates through the reactor and regeneration zones. This dynamic system allows catalyst particles to be constantly renewed and regenerated in-situ, preventing rapid degradation and extending catalyst life while maintaining high upgrading efficiency.
2Productivity
If high pressures are applied to improve catalytic reaction rates, then reaction efficiency increases, but system complexity and safety requirements increase
Solution Approach 1:
The patent optimizes reaction conditions by changing parameters such as temperature, residence time, and catalyst composition rather than relying on high pressures. The moving bed filter system allows for extended residence time and controlled temperature profiles, achieving high reaction rates under moderate pressure conditions and simplifying the overall system.
3Reliability
If catalyst regeneration is performed frequently to maintain activity, then product quality is maintained, but operational time is lost and productivity decreases
Solution Approach 1:
The moving bed filter system enables continuous catalyst regeneration without interrupting the overall process. The filter media continuously circulates through regeneration zones where catalyst particles are reactivated in-situ, allowing the system to maintain continuous operation and product production while constantly renewing catalyst activity.
Solution Approach 2:
The system performs self-regeneration of the catalyst through continuous circulation through regeneration zones. The moving bed filter media automatically brings fresh catalyst particles to the reaction zone and returns spent catalyst to regeneration areas, eliminating the need for external intervention and maintaining continuous productivity.
4Ease of manufacture
If separate filtration and catalytic treatment units are used, then each process can be optimized independently, but device complexity and capital costs increase
Solution Approach 1:
The patent merges filtration and catalytic treatment into a single integrated moving bed filter unit. The filter media serves dual functions: physically filtering contaminants and providing catalytic surfaces for upgrading reactions. This consolidation reduces the number of units required while maintaining the ability to optimize both filtration and catalysis performance.
Solution Approach 2:
The moving bed filter media performs multiple functions simultaneously: it acts as a filtration medium to remove contaminants, a catalyst carrier for upgrading reactions, and a heat transfer medium for temperature control. This multi-functionality eliminates the need for separate dedicated units for each function, reducing system complexity and capital costs.
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 enhances the quality and quantity of useful materials produced by effectively removing contaminants and stabilizing pyrolysis oils, reducing oxygen content, and improving catalyst longevity, thus addressing the limitations of existing technologies.
Implementation Method 1
a catalyst, such that the moving granular bed filter removes particulate matter from said fluid stream and the catalyst simultaneously facilitates a useful chemical reaction in said fluid stream
Implementation Method 2
the moving granular bed filter removes particulate matter from said fluid stream
Implementation Method 3
the catalyst can be separate or independent from (but still admixed with) the filter materials, or can be absorbed or adsorbed thereto, or it can be covalently bonded thereto
Implementation Method 4
the catalyst can be separate or independent from (but still admixed with) the filter materials, or can be absorbed or adsorbed thereto
Data Source
AI summary
The present invention relates generally to a method for removing contaminants from a fluid stream and chemically upgrading the stream at the same time. More particularly, the invention relates to a catalytic moving bed filter for removing contaminants from a gas or vapor stream and to compositions comprising both moving bed filter materials and one or more catalysts intimately admixed therewith.