Quantitative Analysis by Thermogravimetry-Mass Spectrum Analysis for Reactions with Evolved Gases

Rongbin Li; Qian Huang; Kai Wei; Hongde Xia

doi:10.3791/58233

Quantitative Analysis by Thermogravimetry-Mass Spectrum Analysis for Reactions with Evolved Gases

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Engineering

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JoVE Journal Engineering

Quantitative Analysis by Thermogravimetry-Mass Spectrum Analysis for Reactions with Evolved Gases

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06:51 min

October 29, 2018

DOI: 10.3791/58233-v

Rongbin Li¹, Qian Huang², Kai Wei², Hongde Xia²

¹School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing, ²Institute of Engineering Thermophysics,Chinese Academy of Sciences

Overview

This article presents a novel quantitative analysis method for determining the flow rate of evolved gases during reactions. The technique enhances the understanding of reaction kinetics and gas compositions across various fields.

Key Study Components

Area of Science

Energy
Chemistry
Metallurgy

Background

Understanding evolved gases is crucial for studying reaction kinetics.
Current methods lack precision in quantifying individual gas flows.
Thermogravimetry-mass spectrum analysis (TG-MS) is a key technique in this area.
Calibration of characteristic spectra is essential for accurate measurements.

Purpose of Study

To develop a method for precise determination of gas flow rates.
To provide insights into reaction mechanisms in various scientific fields.
To enhance the calibration process for TG-MS systems.

Methods Used

Preparation of evolved gases for calibration.
Modulation of gas pressure at 0.15 megapascals.
Connection of gas cylinders to TG-MS using stainless steel tubes.
Purge of evolved gases at a flow rate of 100 milliliters per minute.

Main Results

Successful calibration of characteristic spectra for evolved gases.
Improved precision in identifying gas compositions and reaction kinetics.
Demonstrated applicability across multiple scientific fields.
Provided a robust framework for future studies in related areas.

Conclusions

The method significantly enhances the analysis of evolved gases.
It offers a reliable approach for studying complex reactions.
Potential applications extend to food, pharmacy, and materials science.

Frequently Asked Questions

What is the significance of evolved gas analysis?

Evolved gas analysis is crucial for understanding reaction kinetics and mechanisms in various scientific fields.

How does the calibration process work?

The calibration involves preparing gases, modulating pressure, and connecting them to the TG-MS system for precise measurements.

What are the potential applications of this method?

This method can be applied in energy, chemistry, metallurgy, food science, pharmacy, and materials research.

What advantages does this technique offer?

It allows for both qualitative and quantitative determination of individual gas flows with high precision.

Can this method be used for other systems?

Yes, it can be adapted for various systems beyond energy and chemistry, including food and pharmaceuticals.

Precise determination of the evolved gases' flow rate is key to study the details of reactions. We provide a novel quantitative analysis method of equivalent characteristic spectrum analysis for thermogravimetry-mass spectrum analysis by establishing the calibration system of the characteristic spectrum and relative sensitivity, for obtaining the flow rate.

This method can help answer key questions in the energy, chemistry, and the metallurgy field about how to identify reaction kinetic parameters and evolved gas compositions. To me, an advantage of this technique is that the mass fluid of individual gases evolved from reactions can be qualitatively and quantitatively precisely determined. Through this method, can provide insight into reactions in the energy, chemistry, metallurgy system, and so on.

It can also be applied to other systems such as food, pharmacy, or materials. To calibrate a characteristic spectrum, prepare the evolved gases to be calibrated, modulating the gas pressure at 0.15 megapascals. Use a stainless steel tube to connect each gas cylinder to the thermogravimetry mass spectrum, or TG-MS system, and purge all the evolved gases into the TG-MS system at a 100 milliliters per minute flow rate.

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