openPR Logo
Press release

Better Characterization of Diesel Exhaust Particulates

The increasing number of environmental zones in large towns with stricter motor vehicle entry allowances, in combination with discussions concerning particulate emissions, is drawing increasing attention to pollutants released from diesel exhaust particulates. Particle filters in diesel vehicles have to be pyrolytically purged of the soot particles that have accumulated. This purge process can be optimized using the results of TGA/FTIR analyses.

TGA/FTIR hyphenation for combustion analysis
In order to determine both the quantity and type of gases released during such a heating process, a combination of thermogravimetric analysis (TGA) and a gas analyzer is ideal. TGA is an experimental technique in which the weight of a sample is measured as a function of temperature or time in isothermal experiments. The Fourier transform infrared spectroscopy (FT-IR) excels in gas analysis, which can be used to continuously examine a gas flow both qualitatively and, with the appropriate calibration, quantitatively.

How it works
The sample gas is rinsed from the furnace of a TGA/DSC 1 using a carrier gas stream (usually consisting of nitrogen or argon) and channeled into a gas vessel in the IR beam path via a heated transfer tube. IR spectra are recorded and saved as series at short intervals. Single spectra are then analyzed at particular points in the measurement in relation to typical IR absorption bands of functional groups in the gas mixture. A comprehensive library of gas phase IR spectra can be of huge benefit here. If the gas types have been identified in this way, height profiles can be created across specific absorption bands as a function of the measuring time. These can then be compared with the TGA and DTG curves as shown in the following diagram.

Combustion analysis
The exhaust particulate sample was heated to 800 °C at a rate of 20 K/min under nitrogen atmospheres followed by a switch to an oxygen purging gas to determine the carbon content via combustion.

Since carbon dioxide continues to accumulate after changing to oxygen at 800 °C, the height profile for the wave number 2360cm-1 is hidden in this phase of the measurement. It is clear that, initially, both free and associated water from the diesel exhaust particulates accumulate to a combined total of 3.2%. With further heating, carbon dioxide is identified as the main gas emission together with low quantities of aliphatic hydroTGA/DSC 1 carbons. Above 300 °C, carbon monoxide and methane are also present. The total amount of gas released between 150 °C and 800 °C in this example is 27.3%. The carbon content following combustion in oxygen atmospheres is 67.6% leaving a residue of less than 2%.

The diagrams on the right side show IR single spectra with the reference spectra of the identified gases.

As this example has shown, TGA combined with a FTIR spectrometer allows not onlythe quantity of the released gases to be determined but also the nature (identity) of the evolved gases formed in the TGA to be investigated online. This allows diesel exhaust particles to be analyzed more accurately. Based on this information, the regeneration (purge) process in catalytic converters of diesel vehicles can be greatly optimized.

For more details: Click here

METTLER TOLEDO specializes in the area of precision instruments for professional use. METTLER TOLEDO laboratory instruments are used in research, scientific, drug discovery, and quality control labs, amongst many others in the pharmaceutical, chemical, food and cosmetics industries. METTLER TOLEDO comprehensive industrial solutions cover the various steps in a host of manufacturing processes at many of the same customers that laboratory serves. Solutions range from receiving raw materials through various manufacturing processes, in-line process control and end-of-line packaging control, to logistics and shipping. Increasingly, these solutions are fully integrated into the customer's IT environment, helping automate their workflows. In food retail, our offering for fresh food management ranges from receiving and pre-packaging, to in-store solutions for self-service departments, deli counters, and checkout terminals.

Contact information:
Mettler-Toledo International Inc.
Im Langacher, Zip Code 8606
Greifensee, Switzerland
E-Mail :
Phone : +41-44-944 33 85
Website :

This release was published on openPR.

Permanent link to this press release:

Please set a link in the press area of your homepage to this press release on openPR. openPR disclaims liability for any content contained in this release.

You can edit or delete your press release Better Characterization of Diesel Exhaust Particulates here

News-ID: 222696 • Views: 1103

More Releases from Mettler-Toledo International Inc.

New Digital Conductivity Sensors Monitor a Wide Range of Chemical Concentrations
METTLER TOLEDO Thornton, a leading provider of pure water analytical measurement solutions, announces the expansion of its conductivity sensor portfolio with the UniCond 4-Edigital sensors.The new four-electrode sensors have been designed to provide highly accurate measurement across a very wide range: a single UniCond 4-E measures from pure potable water to acid or base concentrations. Applications for the UniCond 4-E series include Clean-in-Place and desalination processes, deionization regeneration, industrial processing,
Short Video about Fast and Safe Installation of Tank Scales
A short video explains how the SafeLock features of the Pinmount Weigh Modules from METTLER TOLEDO help to do the installation right the first time. Each Weigh Module is delivered pre adjusted and ready to install. The SafeLock protects the Weigh Module against accidental overload and ensures safety during installation. There is no need for auxiliary devices such as dead stands or dummy load cells. Pinmount Weigh Modules are delivered as
Safe Automated Weighing of Potent Compounds in the Pharmaceutical Industry
METTLER TOLEDO today announced an upcoming webinar entitled “Safe Automated Weighing of Potent Compounds in the Pharmaceutical Industry" with special guest presenter Dr. Roy Helmy, Director of GlobalAnalytical Chemistry at Merck Research Laboratories in Rahway, NJ. In this free educational webinar, laboratory managers andprofessionalswho are concerned with safety or responsible for safety measures will be introduced to an efficient and effective solution for weighing small quantities of potent compounds. Dr.Helmy will
White Paper Discusses Maintaining Sustainable Quality with Weighing
In food production, accurate weighing can greatly impact the overall quality and integrity of the product, as well as enhancing a business's productivity and competitiveness. When a food manufacturer's weighing equipment is not verified, it risks inaccurate weighing and inadequate process quality, safety and compliance. In a new white paper, "GWP - The Global Weighing Standard for the Food Industry," the experts at METTLER TOLEDO have outlined how the global

All 5 Releases

More Releases for TGA

Travel Mobility Scooter Market 2019 Analysis by TGA, Electric Mobility, Vermeire …
Global Travel Mobility Scooter Market 2019-2025: Global Travel Mobility Scooter market size will reach 1120 million US$ by 2025, from 670 million US$ in 2018, at a CAGR of 6.6% during the forecast period. In this study, 2018 has been considered as the base year and 2019-2025 as the forecast period to estimate the market size for Travel Mobility Scooter. Request a Quick Sample PDF report at The following manufacturers
Thermo Gravimetric Analyzer (TGA) Market to Amplify by CAGR Value by 2025 | Top …
This report at InForGrowth presents the worldwide Thermo Gravimetric Analyzer (TGA) market size (value, production and consumption), splits the breakdown (data status 2013-2018 and forecast to 2025), by manufacturers, region, type and application. This study also analyzes the market status, market share, growth rate, future trends, market drivers, opportunities and challenges, risks and entry barriers, sales channels, distributors and Porter's Five Forces Analysis. Download Sample copy of this report at The
Mobility Scooters: The Next Booming Market in the World including Leading Key Pl …
Qyresearchreports include new market research report “Global Mobility Scooters Market Professional Survey Report 2018” to its huge collection of research reports. Mobility scooters are electrically operated vehicles, which in recent times, are widely substituting the traditionally used mobility aids for older consumers and people with disabilities or medical conditions. Boot scooters are small, easily foldable and can be disassembled, making them apt for indoor applications. Most consumers prefer boot scooters owing to
Global Mobility Scooter Market 2018 Top Players: Van Os Medical, TGA Mobility, E …
Qyresearchreports include new market research report “Global Mobility Scooter Sales Market Report 2018” to its huge collection of research reports. Global Mobility Scooter market competition by top manufacturers/players, with Mobility Scooter sales volume, Price (USD/Unit), revenue (Million USD) and market share for each manufacturer/player; the top players including Kymco Sunrise Medical Pride Mobility Products Invacare Roma Medical Hoveround Corp Drive Medical Golden Technologies Quingo Merits Health Products Afikim Electric Vehicles Get PDF for more Professional and Technical insights @ Stakeholders of all sizes
Nov 30, 2017: TGA Thermal Conductivity Analyzer Market Forecast 2023 Linseis The …
TGA Thermal Conductivity Analyzer Market Research 2017 A market study ” Global TGA Thermal Conductivity Analyzer Market ” examines the performance of the TGA Thermal Conductivity Analyzer market 2017. It encloses an in-depth Research of the TGA Thermal Conductivity Analyzer market state and the competitive landscape globally. This report analyzes the potential of TGA Thermal Conductivity Analyzer market in the present and the future prospects from various angles in detail. The Global
Travel Mobility Scooter Market 2017- Kymco, Sunrise Medical, Pride Mobility Prod …
Apex Research, recently published a detailed market research study focused on the “Travel Mobility Scooter Market” across the global, regional and country level. The report provides 360° analysis of “Travel Mobility Scooter Market” from view of manufacturers, regions, product types and end industries. The research report analyses and provides the historical data along with current performance of the global PP Pipe industry, and estimates the future trend of Travel Mobility