Biomass Conversion via Mechanical Rotating Device
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Solution Overview
Problem
Current methods for converting biomass to biofuel, such as pyrolysis, are inefficient, costly, and produce undesirable byproducts, with limited yield and high energy requirements, while ethanol production from cellulose faces challenges like high temperature and pressure needs and low heat value.
Innovation Solution
A system and method utilizing a mechanical rotating device with multiple zones in a reaction tank for biomass processing, including a conical kneading zone, to produce uniform biomass particles and enhance interaction with process fluid, reducing energy needs and byproduct formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pyrolysis process is used to convert biomass to biofuel, then biofuel can be produced, but undesirable byproducts such as dioxins, furans, and coke are produced and energy consumption is high
Solution Approach 1:
The patent changes the fundamental process parameters from high-temperature pyrolysis (>350°C) to low-temperature hydrothermal conversion (subcritical water conditions), thereby eliminating the formation of harmful byproducts like dioxins, furans, and coke while maintaining biofuel production efficiency
Solution Approach 2:
The patent utilizes phase transition of water from liquid to supercritical/subcritical state to create a unique reaction environment that enables efficient biomass conversion without producing harmful byproducts, replacing the traditional pyrolysis thermal decomposition pathway
2Productivity
If pyrolysis process is used to convert biomass to biofuel, then biofuel can be produced, but energy consumption is high and only 20% or less of biomass calorific value is converted to biofuel
Solution Approach 1:
The patent changes the temperature parameter from high-temperature pyrolysis (>350°C) to low-temperature hydrothermal conversion, dramatically reducing energy consumption while improving biofuel yield to convert more than 20% of biomass calorific value into biofuel
Solution Approach 2:
The patent replaces the thermal decomposition mechanism of pyrolysis with a hydrothermal conversion mechanism using subcritical water, eliminating the need for high energy input and achieving more efficient biomass-to-biofuel conversion
3Productivity
If dilute acid process is used to convert cellulose to sugar, then ethanol can be produced, but high temperature and pressure requirements limit material selection and increase costs
Solution Approach 1:
The patent changes the process parameters from high temperature and pressure dilute acid hydrolysis to lower temperature and pressure hydrothermal conversion, expanding material selection for process equipment and reducing manufacturing costs while maintaining ethanol production capability
Solution Approach 2:
The patent uses subcritical water as an intermediary medium to facilitate biomass conversion, replacing the need for expensive acid catalysts and specialized high-temperature/pressure equipment, thereby reducing overall process costs
4Productivity
If ethanol is produced as biofuel, then renewable fuel can be obtained, but heat value is lower (29 MJ/Kg) compared to gasoline and diesel (43 MJ/Kg)
Solution Approach 1:
The patent changes the product specification from ethanol (lower heat value) to hydrocarbon biofuels with higher heat values approaching gasoline and diesel levels (43 MJ/Kg), while maintaining renewable fuel production from cellulosic biomass
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 increases biofuel yield, reduces energy consumption, and minimizes byproduct formation, producing a high-quality biofuel with improved heat value and reduced environmental impact.
Implementation Method 1
at least one zone or section configured to process or size reduce biomass feedstock received from an adjacent zone
Implementation Method 2
at least one zone or section configured to treat or need the size reduced biomass feedstock with process fluid and catalyst under conditions effective to convert at least a portion of the processed biomass feedstock to at least one reaction product
Data Source
AI summary
Disclosed herein is a method and system for converting biomass to biofuel, comprising a reaction apparatus including: a reaction tank configured to hold a process fluid; at least one mechanical rotating device comprising: a submergible chamber configured to operate within process, the submergible chamber having a first section including a first rotatable member and configured to receive biomass feedstock; a second section including a second rotatable member and configured to process biomass feedstock; and a third section including a third rotatable member and configured to treat the processed biomass feedstock effective to convert the processed biomass feedstock; a shaft in operable communication with each of the first, second, and third rotatable members for rotating said rotatable members about an axis; and a drive source for driving the shaft about said axis. Also disclosed herein are kits and methods for using the disclosed system to produce biofuel.