Gas Chromatograph Intermediate Processing Apparatus

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Solution Overview

Problem

Conventional gas chromatographs experience quantitative errors and catalyst deterioration due to halogen and sulfur components, which also cause corrosion and reduce analyzer sensitivity, as adsorbents like activated carbon trap measurement-related components, preventing them from reaching the reduction reaction part.

Innovation Solution

A gas chromatograph intermediate processing apparatus with a reagent containing a metal element oxide that decomposes at ≤1000°C, placed in the intermediate gas flow path, reacts with halogen and sulfur components to form stable compounds, preventing them from reaching the reduction reaction part and allowing measurement target components to pass through without interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an adsorbent such as activated carbon is provided in the intermediate gas flow path to prevent measurement non-related components from reaching the reduction reaction part, then corrosion of metal pipeline and deterioration of reduction catalyst are prevented, but measurement target components (CO2 and CO) are also adsorbed and quantitative errors occur

Engineering Contradiction:

Improveprevention of corrosion and catalyst deteriorationVSAvoidquantification accuracy of measurement target components

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by providing different functional regions: the upstream portion of the intermediate gas flow path contains an adsorbent for removing measurement non-related components, while the downstream portion allows measurement target components to pass through to the reduction reaction part. This spatial differentiation enables simultaneous achievement of corrosion prevention and accurate measurement.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The intermediate gas flow path is segmented into multiple sections with different functions: a first section with an adsorbent for removing halogen and sulfur components, and a second section that allows CO2 and CO to pass through to the reduction reaction part. This segmentation resolves the contradiction by separating the protection function from the measurement function.

Inventive Principle:

Principle #1Segmentation

2Reliability

If a reagent containing metal element oxide is provided in the intermediate gas flow path to react with measurement non-related components, then corrosion and catalyst deterioration are prevented, but the reagent must not interfere with measurement target components

Engineering Contradiction:

Improveprotection of reduction reaction partVSAvoidinterference with measurement target components

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent utilizes parameter changes by selecting a metal element oxide reagent whose reduction temperature is lower than the operating temperature of the reduction reaction part. The reagent reacts with measurement non-related components in the intermediate gas flow path, and any remaining reagent or reaction products are reduced in the reduction reaction part without interfering with CO2 and CO measurement. The key parameter is the temperature difference between reagent reduction and target component reduction.

Inventive Principle:

Principle #35Parameter changes

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 configuration prevents corrosion and quantitative errors by ensuring measurement target components reach the analysis part intact, maintaining catalyst effectiveness and analyzer sensitivity while avoiding reagent interference with intermediate components like CO2 and CO.

Implementation Method 1

a reagent to be reacted with measurement non-related components is provided in the intermediate gas flow path

Methodology Applied

Scientific EffectChemical reaction: Chemical Bonding

Implementation Method 2

the reagent contains a metal element wherein an oxide constituted from only the metal element and oxygen has a decomposition temperature that is equal to or lower than 1,000° C.

Methodology Applied

Scientific EffectThermal decomposition: Decomposition (biological)

Implementation Method 3

an oxidation reaction part into which a sample gas passed through a column is introduced and which oxidizes a measurement target component and converts the resultant measurement target component to a prescribed intermediate component

Methodology Applied

Scientific EffectOxidation reaction: Oxidation

Data Source

PatentUS10060890B2Gas chromatograph intermediate processing apparatus and gas chromatograph

Publication Date: 2018.08.28 HORIBA STEC CO LTD

AI summary

To provide a gas chromatograph allowing a substance led out from a measurement target component to reach a reduction reaction part and capable of preventing occurrence of a quantification error while preventing corrosion and sensitivity deterioration of a metal pipeline due to measurement non-related components such as halogen, sulfur and the like. The gas chromatograph includes: an oxidation reaction part into which a sample gas passed through a column is introduced and which oxidizes the measurement target component and converts the resultant measurement target component to a prescribed intermediate component to be led out therefrom; and an intermediate gas flow path for deriving the intermediate component from the oxidation reaction part, and in this configuration, a reagent to be reacted with measurement non-related components is provided in the intermediate gas flow path, and the reagent contains a metal element to be reacted with only oxygen.