Ball-Milled Gas Sorption for Low-Energy Storage and Separation
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Solution Overview
Problem
Existing gas storage and separation technologies face challenges such as high costs, safety concerns, energy intensity, and limited storage capacity, particularly in chemical reaction techniques, and cryogenic distillation is highly energy-intensive for gas separation.
Innovation Solution
A method involving ball milling solid particulate material under specific conditions (300 kPa pressure, 60:1 weight ratio of milling balls to material, and 200 rpm speed) promotes high adsorption capacities without chemical reactions, utilizing non-covalent bonding for gas storage and differential binding affinities for separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If chemical reaction techniques are used for gas storage, then storage capacity is improved, but energy input for gas recovery increases significantly
Solution Approach 1:
The patent changes the fundamental parameter of gas-solid interaction from chemical bonding to physical adsorption. By using activated carbon or similar adsorbent materials that physically adsorb gas molecules through van der Waals forces rather than chemical reactions, the system achieves high storage capacity while requiring minimal energy for gas recovery through simple pressure reduction or temperature cooling, thus resolving the energy input contradiction.
2Use of energy by moving object
If physical adsorption techniques are used for gas storage, then energy input for gas recovery is reduced, but storage capacity becomes relatively low
Solution Approach 1:
The patent employs porous adsorbent materials such as activated carbon, which possess a highly developed porous structure with large internal surface area. This porous architecture enables physical adsorption to achieve high storage capacities by providing numerous adsorption sites within the pore network, thus resolving the contradiction between low energy input and high storage capacity that plagues conventional physical adsorption approaches.
3Manufacturing precision
If cryogenic distillation is used for gas separation, then separation efficiency is improved, but energy consumption increases significantly
Solution Approach 1:
The patent utilizes porous adsorbent materials with specific pore size distributions and surface chemistries that are selectively adsorptive toward certain gas components. By exploiting differences in gas molecules' interaction with the porous adsorbent surface, the system achieves efficient gas separation through adsorption equilibrium differences rather than requiring energy-intensive cryogenic distillation, thus resolving the energy consumption contradiction.
Solution Approach 2:
The patent changes the separation mechanism from thermal-based cryogenic distillation to adsorption-based separation. By controlling parameters such as adsorbent surface area, pore size distribution, and surface chemistry, the system achieves selective gas separation through physical adsorption differences, eliminating the need for high energy consumption cryogenic cooling while maintaining high separation efficiency.
4Quantity of substance
If compression storage is used for gas storage, then storage density is improved, but cost and safety concerns increase
Solution Approach 1:
The patent employs porous adsorbent materials that can store gas at ambient pressure and temperature through physical adsorption. The porous structure provides high internal surface area for gas uptake, achieving high storage density without requiring high-pressure compression. This approach eliminates the safety hazards associated with high-pressure vessels while maintaining effective storage capacity, thus resolving the safety contradiction.
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
Achieves high gravimetric adsorption capacities, efficient gas storage with low energy input, and effective gas separation, overcoming the limitations of conventional methods.
Implementation Method 1
gas molecules become efficiently adsorbed to the solid particulate material
Implementation Method 2
the gas forming a physical association (e.g. via van der Waal forces) with the adsorbent material
Implementation Method 3
ball milling the solid particulate material (i) in the presence of the one or more gases maintained at a pressure of at least 300 kPa
Data Source
AI summary
The present invention relates to a method of promoting adsorption of one or more gases to solid particulate material, the method comprising ball milling the solid particulate material (i) in the presence of the one or more gases maintained at a pressure of at least 300 kPa, (ii) using a ratio of milling balls to solid particulate material of at least 60:1, and (iii) at an operating speed of at least 200 rpm.