Carbon-Enriched Biomass via Partial Oxidation
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Solution Overview
Problem
Current methods for producing carbon-enriched biomass materials, such as steam treatment, torrefaction, and hydrothermal carbonization, suffer from the generation of harmful volatile organic compounds (VOCs) and unpleasant odors, which pose environmental and health risks, and have inefficient energy balances due to the exclusion of oxygen during processing.
Innovation Solution
A method involving thermal treatment of lignocellulosic material under partially oxidizing conditions, where oxygen is introduced to reduce VOC formation and utilize heat generated within the reaction vessel, improving energy efficiency and product quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If thermal treatment is performed under non-oxidizing conditions (conventional torrefaction), then carbon enrichment occurs, but harmful VOCs are generated and energy balance is inefficient
Solution Approach 1:
The patent changes the oxidation parameter from complete exclusion (conventional torrefiction) to partial oxidation (0.1-10% oxygen in inert gas), which fundamentally alters the chemical pathways to reduce VOC formation while maintaining carbon enrichment
Solution Approach 2:
The patent converts the previously harmful effect of oxygen exposure into a beneficial one by using controlled partial oxidation to decompose hemicellulose and reduce VOC formation, transforming oxygen from a contaminant into a process-enhancing agent
2Quantity of substance
If thermal treatment is performed under non-oxidizing conditions, then carbon enrichment occurs, but energy efficiency is poor due to external heating requirements
Solution Approach 1:
The patent enables the reaction system to self-heat through the exothermic partial oxidation reactions, eliminating or reducing the need for external energy input and creating a self-sustaining thermal process
3Stability of the object's composition
If hemicellulose is degraded during thermal treatment, then structural breakdown occurs, but harmful compounds are formed
Solution Approach 1:
The patent modifies the atmospheric composition parameter to include partial oxygen, which changes the decomposition pathway of hemicellulose from VOC-forming reactions to oxidation reactions that produce CO2 and water instead of harmful organic compounds
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 significantly reduces the formation of harmful VOCs and improves the energy balance, resulting in a carbon-enriched biomass material with enhanced properties, including reduced odor and increased carbon content, making it suitable for industrial applications like dust firing systems.
Implementation Method 1
subjecting said starting material to a treatment at elevated temperature under partially oxidizing conditions in a reaction vessel
Implementation Method 2
utilize heat generated within the reaction vessel
Data Source
AI summary
The present invention provides a carbon-enriched biomass material, a method of producing the carbon-enriched biomass material, and a method for using the carbons-enriched biomass material. A lignocellulosic material is used as a starting material and is treated at elevated temperatures under partially oxidizing conditions in a reaction vessel which is isolated from the environment. The carbon enriched biomass can be used in domestic or industrial combustion processes.