Bio-oil Staged Conversion for Catalyst Stability
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Solution Overview
Problem
Catalyst coking and loss of catalysis, along with impaired process stability and continuity, occur during the upgrading of bio-oil quality using thermochemical catalytic methods, and existing methods often fail to utilize all components of bio-oil effectively, limiting the application scope of bio-oil.
Innovation Solution
A method and device for preparing oxygen-containing liquid fuel by catalytic conversion of bio-oil, involving a bio-oil oil-water separation system, oil-phase bio-oil chemical chain hydrogen production, and water-phase bio-oil catalytic hydrogenation, followed by fractionation and purification, to achieve staged conversion and hydrogen source complementation, utilizing a chemical chain method for hydrogen production and slurry bed catalytic hydrogenation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thermochemical catalytic conversion is applied to all-components of bio-oil, then deoxygenation and calorific value improvement are achieved, but catalyst coking and loss of catalysis occur
Solution Approach 1:
The patent divides bio-oil into water phase and oil phase components, applying different conversion methods to each. The water phase undergoes catalytic hydrogenation while the oil phase undergoes catalytic cracking, preventing catalyst coking by avoiding direct treatment of unstable oil-phase components with hydrogenation catalysts.
Solution Approach 2:
Different conversion methods are applied to different phases of bio-oil based on their specific properties. The water phase (more stable) receives catalytic hydrogenation treatment, while the oil phase (unstable, prone to coking) receives catalytic cracking treatment, optimizing catalyst stability for each phase.
2Manufacturing precision
If catalytic hydrogenation is applied to oil-phase bio-oil, then deoxygenation is achieved, but catalyst coking and process instability occur
Solution Approach 1:
The patent segments the bio-oil treatment process by phase: water phase bio-oil undergoes catalytic hydrogenation while oil phase bio-oil undergoes catalytic cracking. This segmentation prevents catalyst coking that would occur if hydrogenation were applied to the unstable oil phase.
Solution Approach 2:
The patent introduces an intermediary step where oil phase bio-oil is first converted to stable compounds through catalytic cracking before entering the hydrogenation process, preventing direct catalyst coking and maintaining process continuity.
3Reliability
If separate conversion methods are applied to water phase and oil phase, then catalyst stability is improved, but complete utilization of bio-oil components is not achieved
Solution Approach 1:
The patent applies segmentation by treating water phase and oil phase separately with appropriate methods, then combines the products to achieve complete bio-oil utilization. This segmentation prevents catalyst coking while maintaining comprehensive component utilization.
Solution Approach 2:
The patent merges the water phase catalytic hydrogenation process and oil phase catalytic cracking process, combining their respective products to achieve complete utilization of bio-oil components while maintaining catalyst stability through separate treatment methods.
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 realizes staged conversion of all bio-oil components, alleviates catalyst coking, enhances process stability, and improves the quality of oxygen-containing liquid fuel, achieving high carbon conversion rates and reducing reaction conditions, thereby overcoming the limitations of conventional bio-oil upgrading processes.
Implementation Method 1
producing hydrogen from the oil-phase bio-oil by a chemical chain method
Implementation Method 2
water-phase bio-oil catalytic hydrogenation
Implementation Method 3
water-phase bio-oil catalytic hydrogenation system, for receiving the foregoing water-phase bio-oil and hydrogen and for taking low-temperature catalytic hydrogenation reaction with a catalyst to generate hydrogenated gas-phase product
Implementation Method 4
system for oil preparation by fast thermal cracking of biomass
Data Source
AI summary
Devices and methods for preparing oxygen-containing liquid fuel by bio-oil catalytic conversion. A device includes a biomass fast thermal cracking system for preparing bio-oil, a bio-oil oil-water separating system for separating the bio-oil into oil phase bio-oil and water phase bio-oil that is output to an oil phase bio-oil chemical chain hydrogen production system, and a water phase bio-oil catalytic hydrogenation system. The hydrogen production system outputs produced hydrogen to the water phase bio-oil catalytic hydrogenation system to prepare a liquid fuel. A method includes the steps: thermally cracking the biomass to prepare bio-oil, separating the water phase and the oil phase, producing hydrogen from the oil phase bio-oil through a chemical chain method so as to provide a hydrogen source for the water phase bio-oil to carry out two-stage catalytic hydrogenation in a slurry bed, and separating and purifying the hydrogenated products to obtain an oxygen-containing liquid fuel.