Acoustic Heating for Biofuel Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current biofuel production methods from lignocellulosic biomass and coal are inefficient, requiring multiple complex stages, expensive enzymes, and resulting in biofuels with high oxygen content and low energy density, making them difficult to store and process.
Innovation Solution
A single-stage process using supercritical aqueous solvents to convert organic matter into biofuels, eliminating the need for enzyme hydrolysis and separation steps, and incorporating additional catalysts to enhance energy release and decomposition, resulting in biofuels with low oxygen content and high energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional heat transfer through reactor walls is used to maintain high reaction temperatures, then target temperatures can be achieved, but hot-spots are induced causing pyrolysis and carbonisation of material on walls resulting in clogging and blockages
Solution Approach 1:
The patent replaces the mechanical heat transfer system (heat exchangers transferring heat through reactor walls) with an acoustic field system. High-power ultrasound waves are introduced into the reaction medium, providing direct volumetric heating throughout the material without creating localized hot-spots on reactor walls, thereby eliminating pyrolysis and carbonisation issues.
Solution Approach 2:
The patent changes the heating mechanism from thermal conduction through walls to acoustic energy input. By using high-power ultrasound at frequencies of 20-100 kHz with power densities of 0.1-10 kW/L, the system achieves uniform volumetric heating that maintains target temperatures without the harmful wall effects associated with traditional heat transfer methods.
2Temperature
If heat transfer through reactor walls is used to maintain high reaction temperatures, then temperatures can be sustained, but energy loss occurs and scaling up to larger vessels becomes difficult due to reduced heat transfer capacity
Solution Approach 1:
The patent replaces the inefficient wall-based heat transfer system with direct acoustic energy input into the reaction medium. Ultrasound waves propagate through the entire volume of the reaction mixture, providing uniform heating without the energy losses associated with thermal conduction through reactor walls, enabling efficient scaling to larger vessels.
Solution Approach 2:
The patent transitions from surface-based heating (heat transfer through walls) to volumetric heating throughout the entire reaction medium. By introducing acoustic energy that penetrates and heats the bulk material uniformly, the system eliminates the scaling limitations inherent in wall-based heat transfer where larger vessels have reduced surface-area-to-volume ratios.
3Productivity
If traditional biofuel production processes are used, then biofuels can be produced from lignocellulosic biomass, but the biofuels comprise significantly higher oxygen content than conventional fuels resulting in low energy density and poor stability
Solution Approach 1:
The patent applies high-power ultrasound at frequencies of 20-100 kHz with power densities of 0.1-10 kW/L to dramatically alter the chemical composition of the produced biofuel. This acoustic field treatment promotes deoxygenation reactions and molecular restructuring, reducing oxygen content from typical high levels to below 10 wt%, thereby achieving energy density and stability comparable to conventional fuels.
Solution Approach 2:
The patent replaces traditional enzymatic hydrolysis and fermentation processes with acoustic field-based conversion. The high-power ultrasound directly breaks down lignocellulosic biomass and controls the chemical reactions to produce a deoxygenated hydrocarbon-rich fuel, eliminating the need for complex multi-step biological processes that produce high-oxygen content biofuels.
4Productivity
If current biofuel production processes are used, then conversion of organic matter can occur, but the processes are complex and time-consuming requiring multiple separation steps and expensive enzymes
Solution Approach 1:
The patent replaces complex enzymatic hydrolysis and fermentation systems with a single acoustic field-based conversion process. High-power ultrasound directly converts lignocellulosic biomass into fuel components in one operation, eliminating the need for expensive enzymes, multiple separation steps, and complex bioreactor systems while maintaining high conversion efficiency.
Solution Approach 2:
The patent combines multiple traditional process steps (hydrolysis, fermentation, separation, purification) into a single acoustic field treatment step. By applying high-power ultrasound to the biomass slurry, the system simultaneously breaks down cellulose and hemicellulose, promotes dehydration and deoxygenation reactions, and produces a stabilized fuel product in one integrated operation.
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 produces biofuels with improved stability and energy density, facilitating easier storage and blending with conventional fuels, and allows for more efficient conversion of organic matter into high-quality fuel products.
Implementation Method 1
heating said organic matter by acoustic energy to a temperature sufficient to convert said organic matter into a gaseous product
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates generally to the field of biofuel synthesis. More specifically, the invention relates to processes for the synthesis of biofuels from organic materials including lignocellulosic biomass and coal. Also provided are biofuel products obtained from processes of the invention.