Derivatization Agent for Sulfur Measurement in Gas

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Solution Overview

Problem

Conventional methods for determining sulfur-content in gas and liquefied petroleum gas samples are plagued by safety risks, inaccurate measurements due to sulfur species absorption in storage containers, and damage to analytical systems by impurities.

Innovation Solution

The method involves contacting the gas or liquefied petroleum gas sample with a derivatization agent to form derivatized sulfur-containing compounds, which are then analyzed to determine the total concentration of sulfur-containing compounds, including hydrogen sulfide, carbonyl sulfide, and dialkyl sulfides.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional gas chromatography methods are used to analyze sulfur-containing compounds, then analytical data can be obtained, but sulfur species absorb on storage container walls affecting measurement accuracy

Engineering Contradiction:

Improvesulfur content measurement accuracyVSAvoidsulfur species absorption on container walls

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by derivatizing sulfur-containing compounds in the gas sample before analysis. The derivatization agent reacts with sulfur species to form stable derivatives that do not absorb on container walls, preventing measurement errors before the actual analysis occurs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The derivatization agent acts as an intermediary substance that converts problematic sulfur species into stable, non-absorbing derivatives. This intermediary transformation eliminates the harmful absorption effect while preserving the ability to measure sulfur content.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If gas samples are transported for analysis, then samples can be analyzed, but safety risks increase due to pressurized gas transport

Engineering Contradiction:

Improvesample analysis capabilityVSAvoidsafety risks from pressurized gas transport

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the physical state parameter of sulfur-containing compounds through derivatization. The derivatized compounds have different physical properties that make them safer to handle and transport, reducing the safety risks associated with pressurized gas transport while maintaining analysis capability.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If conventional gas chromatography is used, then sulfur content can be determined, but impurities damage analytical systems requiring costly maintenance

Engineering Contradiction:

Improvesulfur content determinationVSAvoidimpurity damage to analytical systems

Core Design Contradiction:

Measurement precisionVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful effect of impurities damaging analytical systems into a benefit by using derivatization. The derivatization process transforms sulfur-containing impurities into stable, non-damaging derivatives that can be analyzed without compromising the analytical system, turning a harmful factor into a manageable analyte.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

4Measurement precision

If conventional methods are used, then sulfur content can be measured, but analytical standards are difficult to source and have short shelf-lives

Engineering Contradiction:

Improvesulfur content measurementVSAvoidavailability and stability of analytical standards

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent employs disposable derivatization reagents that are stable and easy to store, replacing the need for precious and unstable analytical standards. These derivatization agents can be readily obtained, stored indefinitely, and used repeatedly, eliminating the difficulties associated with sourcing and maintaining analytical standards.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 approach provides safer and more accurate characterization of sulfur-containing compounds, avoiding the limitations of conventional methods by ensuring precise measurement and minimizing equipment damage.

Implementation Method 1

contacting the gas sample or liquefied petroleum gas sample comprising one or more sulfur-containing compounds with a derivatization agent to form one or more derivatized sulfur-containing compounds

Methodology Applied

Scientific EffectChemical Bonding: Chemical Bonding

Data Source

PatentUS20250137981A1Systems and methods of measuring sulfur composition in a gas and liquified gas

Publication Date: 2025.05.01 SAUDI ARABIAN OIL CO

AI summary

This disclosure relates to methods of determining the sulfur-content in a gas sample or liquefied petroleum gas sample comprising sulfur-containing compounds, including derivatizing the sulfur-containing compounds and analyzing the derivatized sulfur-containing compounds.