CO2 Desorption Measurement Using Flow Mass Balance
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Solution Overview
Problem
Existing methods for accurately measuring and recovering carbon dioxide face challenges in accurately detecting the concentration of desorption gases due to varying flow rates and the need for specialized sensors, especially when high concentrations are involved.
Innovation Solution
A method and device that utilize general-purpose sensors to measure the flow rate and concentration of target and residual gases, followed by calculations to determine the concentration of desorption gases, and control processing times and flow rates based on these measurements to enhance recovery efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a general-purpose sensor is used to detect carbon dioxide concentration, then device cost and complexity are reduced, but measurement precision deteriorates due to high concentration ranges
Solution Approach 1:
The detection process is segmented into two parts: direct measurement of low-concentration gases (target gas and residual gas) using general-purpose sensors, and calculation of high-concentration desorption gas concentration through mass balance equations. This segmentation allows using simpler sensors while achieving accurate overall measurement.
Solution Approach 2:
The patent introduces an intermediary calculation method using mass balance equations as a mediator between the measurable low-concentration gases and the unmeasurable high-concentration desorption gas. The concentration of desorption gas is not directly measured but derived through this intermediary mathematical relationship.
2Measurement precision
If direct detection of desorption gas concentration is attempted, then measurement accuracy could be maintained, but device complexity increases due to flow rate variations requiring specialized sensors
Solution Approach 1:
The patent segments the measurement task to avoid directly measuring desorption gas concentration. Instead, it measures target gas and residual gas concentrations separately using general-purpose sensors, then calculates desorption gas concentration through mass balance, thereby avoiding the need for specialized high-concentration sensors.
Solution Approach 2:
The system uses feedback from flow rate measurements and concentration readings of target and residual gases to continuously calculate and update the desorption gas concentration. This feedback loop allows accurate tracking of desorption gas concentration without direct measurement.
3Ease of operation
If flow rate variations in desorption gas are not accounted for, then measurement simplicity is maintained, but measurement precision deteriorates
Solution Approach 1:
The patent incorporates flow rate measurements as feedback parameters in the mass balance calculation. By continuously monitoring flow rates of target gas, residual gas, and desorption gas, the system compensates for flow variations and maintains accurate concentration measurements without complicating the overall measurement approach.
Solution Approach 2:
The patent changes the measurement parameters from direct concentration measurement of desorption gas to combined measurement of flow rates and concentrations of target and residual gases. This parameter transformation allows accounting for flow rate variations while maintaining measurement simplicity through standard sensors.
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
Accurate detection of carbon dioxide concentrations in desorption gases allows for improved recovery methods, enhancing the percentage of carbon dioxide recovered and reducing the need for specialized, expensive sensors.
Implementation Method 1
carbon dioxide contained in a target gas to be adsorbed by an adsorbent
Implementation Method 2
desorbing carbon dioxide from the adsorbent, to thereby yield a desorption gas containing carbon dioxide
Data Source
AI summary
A concentration measurement method for measuring a carbon dioxide concentration of a desorption gas containing carbon dioxide desorbed from an adsorbent which has adsorbed carbon dioxide contained in a target gas. The method includes a first processing of detecting a flow rate and a carbon dioxide concentration of the target gas; a second processing of detecting a flow rate and a carbon dioxide concentration of a residual gas resulting from adsorption of carbon dioxide contained in the target gas by the adsorbent; and a calculation processing of determining the carbon dioxide concentration of the desorption gas on the basis of the results of the first processing and the second processing.