Solid CO2 Storage for Flue Gas Sampling
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Solution Overview
Problem
Current methods for determining the ratio of biomass-derived and fossil-derived CO2 in flue gas streams from incineration furnaces are inaccurate, require experienced personnel, and involve cumbersome liquid storage that is difficult to transport and less reliable.
Innovation Solution
A method involving sampling CO2 from flue gas streams using a solid-based CO2 storage material, which can be transported to an analysis site for 14C analysis, allowing for easier and more reliable determination of the CO2 ratio, with a proportional sampling system to ensure accuracy and robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid storage medium is used to store sampled CO2, then CO2 can be stored and transported, but the storage and transport become cumbersome and less reliable
Solution Approach 1:
The patent changes the physical state of the storage medium from liquid to solid form. The solid storage medium (e.g., solid adsorbent materials like molecular sieves, activated alumina, or activated carbon) can adsorb CO2 from the gas stream and store it in a compact, stable form that is easier to transport and handle while maintaining reliability.
Solution Approach 2:
The patent utilizes phase transition between solid and gas phases through adsorption and desorption processes. The solid storage medium adsorbs CO2 from the flue gas stream during sampling, and then the stored CO2 can be desorbed (released) when needed for analysis, providing a reliable and transportable storage solution.
2Measurement precision
If on-site analysis is performed, then immediate results are obtained, but the system becomes more complex and requires experienced personnel
Solution Approach 1:
The patent extracts the analysis function from the sampling site and relocates it to a separate laboratory setting. The sampling device collects and stores CO2 samples in the field, which are then transported to a laboratory for 14C analysis. This separation simplifies the field device while maintaining analytical accuracy.
Solution Approach 2:
The solid storage medium acts as an intermediary between the flue gas stream and the analysis instrument. It captures and preserves the CO2 sample in a stable form, allowing for transport and subsequent analysis without requiring complex on-site analysis equipment or highly skilled personnel at the sampling location.
3Measurement precision
If random checks are performed on the fuel stream, then fossil fuel content can be determined, but the method becomes inaccurate and requires highly experienced investigators
Solution Approach 1:
The patent enables continuous sampling of CO2 from the flue gas stream through the solid storage medium, providing a representative sample that reflects the ongoing combustion process. This continuous sampling approach improves accuracy compared to random checks while simplifying operation through automated sampling.
Solution Approach 2:
The solid storage medium performs the sampling and storage function automatically without requiring manual intervention or highly skilled operators. The system self-regulates the sampling process, making it easier to operate while maintaining high measurement precision through consistent, representative sampling.
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 method provides accurate and reliable determination of the CO2 ratio, reducing the need for on-site analysis and improving transport and storage reliability, while allowing for proportional sampling to match varying flue gas flows.
Implementation Method 1
storing CO2 from the flue gas stream in a storage device, wherein the storage device comprises a solid based CO2 storage material
Data Source
AI summary
The invention provides a method for sampling gas in a flue gas stream (31) of an incineration furnace (1) or another CO2-containing gas stream. The method comprises sampling CO2 from the flue gas stream (31) of the incineration furnace (1) and storing CO2 from the flue gas stream (31) in a storage device (5). The storage device comprises a solid, preferably silica- or alumina-based CO2 storage material, which can be regenerated. The method further preferably involves transporting the storage device (5) to an analysis site (10) comprising an apparatus for 14C analysis, retrieving at least part of th stored CO2 from the storage device (5) and determining, based on the 14C analysis, the ratio of biomass-derived and fossil-derived CO2 in the flue gas stream (31).