Integrated Gas Chromatograph System for Natural Gas Monitoring
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Solution Overview
Problem
Conventional gas chromatograph techniques lack accuracy in differentiating minute changes in natural gas composition during processing, leading to inefficiencies in natural gas upgrading processes due to ±3% variation in results when used in series, which hinders the ability to optimize membrane selection or modification in real-time.
Innovation Solution
An integrated gas chromatographic system with a single heating oven and controller, utilizing multiple chromatographs that operate simultaneously and are calibrated with the same feed, to reduce variation to less than ±1%, allowing for precise monitoring of natural gas composition changes across different stages of separation and upgrading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple gas chromatographs are used in series to monitor natural gas composition, then the monitoring coverage is improved, but the measurement precision deteriorates due to ±3% variation between instruments
Solution Approach 1:
The patent combines multiple gas chromatographs into a single integrated system where all instruments share common calibration standards, heating oven, and data processing. This merging eliminates the ±3% variation between independent instruments while maintaining the ability to monitor multiple process streams simultaneously, thus resolving the contradiction between monitoring coverage and measurement precision.
Solution Approach 2:
The integrated system creates a universal platform where a single calibration standard and heating oven serve all chromatographs in the system. This multi-functionality ensures that all instruments operate from the same reference baseline, eliminating inter-instrument variability while maintaining the expanded monitoring capacity of multiple detectors.
2Device complexity
If conventional gas chromatograph techniques are used, then the system complexity is reduced, but the measurement precision deteriorates due to inability to detect minute composition changes
Solution Approach 1:
By merging multiple chromatographs into an integrated system with shared calibration and heating resources, the patent achieves high measurement precision for detecting minute composition changes without proportionally increasing system complexity. The shared components reduce the total number of independent subsystems compared to using multiple standalone high-precision instruments.
3Adaptability or versatility
If multiple independent gas chromatographs are used, then the monitoring capability is improved, but the device complexity increases due to multiple calibration and heating systems
Solution Approach 1:
The patent merges the calibration systems and heating ovens of multiple chromatographs into shared common resources. This integration maintains the monitoring capability of multiple simultaneous measurements while reducing device complexity by eliminating redundant calibration standards and heating control systems that would otherwise be required for independent instruments.
Solution Approach 2:
The integrated system implements universal calibration standards and heating ovens that serve multiple chromatographs simultaneously. This multi-functionality allows the system to maintain expanded monitoring capability while reducing overall device complexity through resource sharing and centralized control.
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 integrated system enables reliable measurement of small changes in natural gas composition, enhancing the evaluation of upgrading process efficiency and allowing for real-time adjustments to improve natural gas quality by reducing analytical deviation and improving the sensitivity to detect minor changes in composition.
Implementation Method 1
the at least one upstream gas chromatograph, the first downstream gas chromatograph, and the second downstream gas chromatograph all utilize the same heating oven to heat samples of natural gas
Implementation Method 2
an integrated gas chromatographic system with a single heating oven and controller, utilizing multiple chromatographs
Data Source
Figure 1
AI summary
A gas chromatographic method for analyzing natural gas and a natural gas upgrading system using the gas chromatographic method for analyzing natural gas. The method includes transporting the natural gas through a chiller, transporting the natural gas from the chiller to at least two gas upgrading membranes, and operating a gas chromatographic system having at least one upstream gas chromatograph and at least two downstream gas chromatographs. The at least one upstream gas chromatograph, the first downstream gas chromatograph, and the second downstream gas chromatograph all operate simultaneously and utilize the same heating oven to heat samples of natural gas.