Isotopic Ratio Analysis for Carbon Source Tracking
Solution Overview
Problem
The petrochemical industry faces challenges in determining the source of carbon used in manufacturing products, particularly in tracking and inventorying olefin or olefin-derived products, as existing methods do not effectively differentiate between various carbon feed sources, affecting product quality and integration with the methanol-to-olefins (MTO) process.
Innovation Solution
A method involving the determination and comparison of the 13C:12C or HD:H2 isotopic ratios of products and carbon feeds to identify the source, using techniques such as mass spectrometry and gas chromatography to analyze samples and track products based on these ratios, ensuring accurate sourcing and inventory management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used to determine carbon source, then the process is simple, but the measurement precision is insufficient to differentiate between various carbon feed sources
Solution Approach 1:
The patent changes the measurement parameter from conventional carbon analysis to isotopic ratio analysis (13C:12C or HD:H2). By measuring these specific isotopic parameters, the system achieves precise differentiation between carbon sources (natural gas, petroleum, coal, biomass) without requiring complex multi-parameter instrumentation, thus resolving the contradiction between measurement precision and device complexity.
2Reliability
If isotopic ratio analysis is performed to track carbon sources, then the product quality control is improved, but the analysis time and operational complexity increase
Solution Approach 1:
The patent replaces complex chemical tracking methods with isotopic ratio measurement. This substitution enables reliable carbon source identification through direct measurement of 13C:12C or HD:H2 ratios, significantly reducing analysis time while maintaining or improving product quality control reliability compared to conventional chemical tracking methods.
3Adaptability or versatility
If multiple carbon feed sources are integrated into the MTO process, then the productivity and versatility increase, but the difficulty of tracking and inventorying products increases
Solution Approach 1:
The patent introduces isotopic ratio (13C:12C or HD:H2) as an intermediary marker that carries information about the carbon source origin. This intermediary parameter allows the system to track and distinguish products from different carbon feed sources (natural gas, petroleum, coal, biomass) throughout the MTO process, resolving the information loss problem while maintaining feed source integration versatility.
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 allows for precise tracking and inventorying of products derived from specific carbon sources, enhancing product quality control and facilitating better integration of MTO process facilities by identifying the origin of carbon feedstocks, thereby improving product quality and operational efficiency.
Implementation Method 1
determining 13C:12C ratio of the product
Implementation Method 2
using techniques such as mass spectrometry and gas chromatography to analyze samples
Data Source
AI summary
This invention is directed to a method for determining a source of carbon feed used in manufacturing product produced from the carbon feed. The invention further provides a method for tracking products, particularly MTO products, derived from a particular carbon feed. In general, the method involves a variety of steps that include one or more of determining, comparing, inventorying, and tracking the 13C:12C ratio (or HD:H2 ratio) of the product that is being tracked to the measured or predetermined 13C:12C ratio (or HD:H2 ratio) of the feed used to make the product.