Steam-Cracked Biomass Substrate for Green Chemistry
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Solution Overview
Problem
Current methods for processing lignocellulosic biomass for biotechnological and green chemistry applications are hindered by the use of chemical auxiliaries, which increase costs, yield loss, and environmental impact, and lack economically viable and environmentally friendly industrial-scale solutions for high-value product production.
Innovation Solution
A continuous steam-cracking method for dry lignocellulosic biomass without chemical additives, producing a stable pulverulent carbon substrate suitable for enzymatic hydrolysis and fermentation, reducing equipment size and costs, and eliminating effluents and corrosion risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical auxiliaries (sulfuric acid, alkaline ammonia) are added to biomass for steam cracking, then the biomass pre-treatment effectiveness is improved, but the production cost increases and environmental impact worsens
Solution Approach 1:
The patent removes chemical auxiliaries from the steam cracking process, using only water vapor as the cracking medium. This extraction of harmful chemical additives resolves the contradiction by maintaining pre-treatment effectiveness through physical steam explosion while eliminating chemical pollution and associated costs.
Solution Approach 2:
The patent changes the operating parameters of steam cracking to achieve effective biomass pre-treatment without chemical additives. By optimizing temperature (160-230°C), pressure (12-28 atmospheres), and residence time, the process achieves sufficient lignocellulosic matrix disruption using only physical parameters, resolving the contradiction between effectiveness and chemical-free operation.
2Ease of operation
If wet method (40-70% water content) is used for biomass steam cracking, then the biomass is easier to process, but the equipment size and production costs increase
Solution Approach 1:
Instead of starting with wet biomass and removing water, the patent inverts the approach by using dry or low-moisture biomass (5-30% water content) and introducing water vapor during the cracking process. This inversion reduces equipment size by eliminating large-scale wet processing and drying systems while maintaining processability through in-situ vapor generation.
Solution Approach 2:
The patent uses water vapor (gas phase) instead of liquid water for the cracking process. This pneumatic approach allows water to penetrate the biomass matrix more effectively without requiring the biomass to be in a wet state, reducing equipment complexity and size while maintaining ease of operation.
3Stability of the object's composition
If vapor explosion method is used with high water content biomass, then the lignocellulosic matrix disintegration is improved, but the yield loss and detoxification requirements increase
Solution Approach 1:
The patent converts the potential harm of excessive water and chemical additives into a benefit by using controlled water vapor in a dry biomass system. The steam provides the necessary moisture for disintegration while preventing over-hydrolysis and inhibitor formation, thus improving matrix breakdown without increasing yield loss or detoxification requirements.
Solution Approach 2:
The patent employs continuous steam cracking where water vapor is continuously introduced throughout the process, maintaining optimal moisture levels for lignocellulosic disintegration without the peaks and valleys of batch wet processing. This continuous action ensures consistent breakdown efficiency while minimizing sugar loss and inhibitor formation.
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 method provides a cost-effective, environmentally friendly, and stable carbon substrate for high-value product production, enabling efficient enzymatic hydrolysis and fermentation without chemical auxiliaries, reducing capital and operational expenses, and allowing for scalable industrial implementation.
Implementation Method 1
The disclosure relates to a carbon substrate obtained by steam-cracking of a lignocellulosic biomass
Implementation Method 2
The principle is the water vapor explosion of the biomass
Implementation Method 3
the atmospheric pressure is immediately reduced to atmospheric pressure, creating a vapor explosion
Data Source
AI summary
An energy substrate is obtained by steam cracking of a biomass. More specifically, the disclosure relates to a steam-cracked biomass in the form of dry powder and devoid of any chemical additive, to a method for the production thereof and to the use thereof as a substrate for green chemistry and biotechnological methods such as enzymatic hydrolysis and fermentation.