Bio-Oil Upgrading With Ammonia for Single-Step Phase Separation
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Solution Overview
Problem
Bio-oil produced from torrefaction or pyrolysis has unfavorable properties such as high acidity and water content, leading to storage and transportation issues, and complex organic species make it difficult to utilize as a chemical feedstock, with existing upgrading processes being costly and multi-step.
Innovation Solution
A method involving the reaction of bio-oil with gaseous ammonia to separate into distinct aqueous and organic phases, enhancing the energy content of the organic phase and providing valuable products like ammonium species.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bio-oil upgrading processes are used, then bio-oil properties can be improved, but processing costs increase and process complexity increases
Solution Approach 1:
The invention changes the chemical parameter of the bio-oil by introducing ammonia to react with acidic components, transforming the chemical composition to reduce acidity and improve storage stability without requiring complex multi-step processing equipment
Solution Approach 2:
The invention extracts and removes the harmful acidic components from the bio-oil through ammonia reaction, separating them as ammonium salts while retaining the valuable organic phase, thereby simplifying the overall processing approach
2Reliability
If multiple pH adjustment steps are used to separate bio-oil phases, then separation can be achieved, but processing steps and costs increase
Solution Approach 1:
The invention performs preliminary chemical modification by adding ammonia to the bio-oil before separation, which pre-reacts with acidic components to form water-soluble ammonium salts, facilitating easier phase separation in a single step rather than requiring multiple pH adjustments
Solution Approach 2:
Ammonia acts as an intermediary substance that mediates between the acidic bio-oil components and water, enabling phase separation by forming water-soluble ammonium salts that partition into the aqueous phase, thereby simplifying the separation process
3Ease of operation
If bio-oil is stored with high acidity content, then storage is simpler, but corrosion of containers occurs
Solution Approach 1:
The invention converts the harmful acidic components of the bio-oil into beneficial ammonium salts through reaction with ammonia, eliminating the corrosion problem while simultaneously improving the overall quality and stability of the stored bio-oil
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 achieves a simple, single-step bio-oil upgrading that produces a high-energy organic phase suitable for fuels and a useful aqueous phase, while also functioning as an ammonia scrubber, reducing environmental impact and processing costs.
Implementation Method 1
ammonia of the gas can react with one or more components of the bio-oil
Implementation Method 2
The resulting mixture can include an aqueous phase and an organic phase
Data Source
AI summary
Methods for upgrading a bio-oil are described. The methods utilize gaseous ammonia to react with one or more components of a bio-oil and thereby upgrade the bio-oil and separate the resulting mixture into organic and aqueous phases. Both the aqueous phase and the organic phase produced by the process can contain useful species such as ammonium species and an organic phase with increased energy content as compared to the bio-oil.