Catalyst Regenerator Biofuel Combustion for Lower Carbon Emissions
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Solution Overview
Problem
Existing catalytic cracking catalyst regeneration methods rely on fossil energy sources, leading to high carbon dioxide emissions, and lack efficient energy utilization, complicating the process and increasing costs.
Innovation Solution
A method and system using gaseous biomass-derived fuel, such as hydrogen and methane, directly fed into the catalyst regenerator with controlled oxygen content for coke-burning, optimizing the regeneration process to reduce carbon emissions and improve energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If fossil energy sources are used for catalyst regeneration, then energy supply is sufficient, but carbon dioxide emissions are high
Solution Approach 1:
The patent changes the fundamental parameter of energy source from fossil-based to biomass-based. By using gaseous fuel derived from biomass (such as biogas or biomass-derived syngas) instead of traditional fossil fuels, the carbon cycle becomes sustainable as the carbon released during combustion was recently absorbed from the atmosphere by growing biomass, thereby reducing net carbon dioxide emissions.
Solution Approach 2:
The patent utilizes biomass as a renewable, readily available energy source that can be continuously produced. Biomass materials (agricultural residues, forestry waste, etc.) are abundant and can be sustainably harvested, providing a continuous supply of gaseous fuel for regeneration without depleting finite fossil resources.
2Loss of substance
If complex separation and purification processes are implemented, then carbon monoxide and carbon dioxide can be recovered, but process complexity and costs increase
Solution Approach 1:
The patent extracts and utilizes the carbon monoxide and carbon dioxide generated during incomplete catalyst regeneration directly without requiring complex separation and purification systems. By designing the regeneration process to operate under controlled oxygen-deficient conditions, the flue gas naturally contains high concentrations of carbon monoxide and carbon dioxide that can be directly captured and utilized.
Solution Approach 2:
The patent enables the regeneration system to self-utilize its own byproducts. The carbon monoxide and carbon dioxide produced during regeneration are directly fed back into the regeneration process or used for energy generation, creating a self-sufficient system that eliminates the need for external separation and purification infrastructure.
3Loss of substance
If incomplete regeneration is performed, then carbon monoxide can be utilized as chemical raw material, but energy utilization rate decreases
Solution Approach 1:
The patent implements a continuous regeneration process where carbon monoxide and carbon dioxide are continuously generated and immediately utilized without interruption. The flue gas from incomplete regeneration is continuously fed back into the system, maintaining continuous carbon monoxide production for chemical synthesis while simultaneously maintaining the thermal energy needed for sustained regeneration operations.
Solution Approach 2:
The patent performs preliminary controlled incomplete combustion during the regeneration process to pre-generate carbon monoxide and carbon dioxide in controlled amounts. This preliminary action ensures that the necessary carbon-containing gases are available before they are needed for subsequent chemical reactions or energy generation, optimizing both carbon utilization and energy efficiency.
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 fundamentally changes the energy source to renewable biomass, reduces carbon dioxide emissions, simplifies the process, enhances catalyst selectivity, and stabilizes combustion, while enabling negative carbon emissions and energy recycling.
Implementation Method 1
introducing gaseous fuel derived from biomass into the catalyst regeneration system for combustion to provide energy
Implementation Method 2
contacts with the gaseous fuel and the oxygen-containing gas for coke-burning and regeneration
Data Source
AI summary
A catalyst regeneration method is suitable for a fluidized catalytic cracking unit having a catalytic cracking reactor and a catalyst regenerator. The regeneration method has the following steps: 1) providing a gaseous biomass-derived fuel containing hydrogen and/or methane; 2) directly feeding the gaseous fuel into the catalyst regenerator without separation and purification; 3) introducing an oxygen-containing gas into the catalyst regenerator; and 4) feeding the catalyst to be regenerated from the catalytic cracking reactor into the catalyst regenerator, where it contacts the gaseous fuel and the oxygen-containing gas for coke-burning and regeneration. The method introduces a gaseous biomass-derived fuel as energy supply in the catalyst regeneration process to replace fossil fuels, fundamentally changing the energy source of the catalytic cracking unit, significantly reducing the carbon emissions of the catalytic cracking unit, realizing the recycling of carbon elements, and supplying energy to other process units.