Bio-char Agent Deposition via Steam Condensation Vacuum
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Solution Overview
Problem
Current methods are limited in depositing agents deep within the pores of bio-char, which is challenging due to its small pore size, resulting in inefficient long-term release of compounds in agricultural applications.
Innovation Solution
A method involving the use of steam to introduce liquid agents into the pores of bio-char, where the steam is condensed to create a partial vacuum, drawing the liquid and its agents deep into the char's pores, allowing for deposition up to 20-25 microns in depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional deposition methods are used, then agents can be deposited on the surface of bio-char, but the deposition depth is limited due to small pore size
Solution Approach 1:
The patent utilizes phase transitions of water (liquid to vapor to liquid) to drive agent deposition. Water is introduced as liquid, vaporized by heating the bio-char to create steam pressure, then condensed back to liquid form to draw agents deep into pores through vacuum formation, achieving deposition depths of 20-25 microns
Solution Approach 2:
The patent changes temperature parameters cyclically (heating to vaporize water, cooling to condense steam) to create pressure differentials that drive deep agent penetration. Temperature variations from ambient to above 100°C and back enable the vacuum formation necessary for deep pore infiltration
2Reliability
If bio-char with high porosity and small pore width is used, then water leaching resistance is improved, but deep embedding of agents becomes challenging
Solution Approach 1:
The phase transition of water through vaporization and condensation creates pressure differentials that temporarily overcome the small pore width barrier. The steam generation expands water into vapor that can penetrate pores, and subsequent condensation creates vacuum that draws agents deep into the pore structure, achieving 20-25 micron deposition depths while maintaining the inherent water leaching resistance
3Duration of action of moving object
If agents are deposited deep within pores, then long-term slow release is achieved, but conventional methods cannot reach sufficient depth
Solution Approach 1:
The cyclic vaporization and condensation of water creates pressure differentials that drive agents to deposition depths of 20-25 microns. This deep embedding ensures long-term slow release as agents must traverse the entire pore length to reach the surface, extending the functional duration of the bio-char in soil applications
Solution Approach 2:
The patent performs preliminary vaporization of water within the bio-char pores before introducing agents. This creates the pressure differential and vacuum conditions necessary for deep agent penetration, preparing the pore structure in advance to receive and retain agents at optimal depths for long-term release
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
Enables the deep embedding of agents within bio-char, facilitating a slow and sustained release of nutrients into the soil, enhancing plant growth and extending the longevity of soil conditioning.
Implementation Method 1
The bio-char is cooled to below a condensation temperature of the steam, to draw at least a portion of the liquid medium into the pores of the bio-char
Implementation Method 2
The liquid medium in the pores is then evaporated, so as to deposit the agent within the pores of the bio-char
Implementation Method 3
The liquid medium in the pores is then evaporated, so as to deposit the agent within the pores of the bio-char
Implementation Method 4
supplying steam to the bio-char to introduce the steam into pores within the bio-char. The bio-char is then immersed in a liquid medium carrying at least one agent for deposition
Data Source
AI summary
Methods and apparatuses for depositing agents relatively deep within pores of bio-char. Bio-char is first produced in an airtight oven by heating biomass feedstock. The bio-char is then cooled and steam is diffused into the pores of the bio-char. The steam-laden bio-char is immersed in a liquid bath containing soluble agents that are to be deposited in the pores of the bio-char. The liquid bath cools the char to below the condensation temperature of the steam, whereupon the condensing steam generates a partial vacuum within the pores, drawing the liquid into the pores. The bio-char is then removed from the liquid bath and dried so that the liquid within the pores evaporates, leaving behind the soluble agent. Accordingly, the invention yields bio-char that has soluble agent embedded relatively deep within its pores.