Skip to main content
RISE logo

Gas measurements dilute - non-condensable gases, DNCG

What is normally called dilute non-condensable gases, DNCG contains a mixture of different sulfur-containing substances; hydrogen sulfide, methyl mercaptan, DMS and DMDS.

The need to be able to collect and destroy so-called particulate matter (DNCG) has increased as the EU tightened requirements on industry to use best available technology to reduce sulfur emissions to air.

The concept for the gas measurements is based on a portable gas chromatograph being set up on site so that the weak gases can be quickly analyzed from different test points. According to EU Directive 2010/75 / EU, the requirements in the BAT conclusions must be met by 30 September 2018 and all mills must report how the requirements are complied with or how they plan to comply with them. The concept is based on a portable gas chromatograph being set up on site, so that the samples can be quickly taken out and analyzed.

The way for the pulp mills to solve the problem with low gases is to reduce the various emissions and collect them to a point, for example the recovery boiler, for combustion. But in order to be able to dimension a plant for this, the size of the flows and their composition must be known.

RISE has developed methods for DNCG mapping - measures flows and to analyze the sulfur content (DNCG) in the pulp mills' low gases.

DNCG - Total Reduced Sulfur Amount: The sum of the following reduced odorous sulfur compounds formed during pulp production: hydrogen sulphide, methyl mercaptan, dimethyl sulphide and dimethyl disulphide, expressed as sulfur. Diluted non-condensable odorous gases: Gases with DNCG content that are not strong odorous gases (eg gases from tanks, washing filters, chip pockets, mesa filters or dryers).

RISE can also do analyzes of gases in vents from tanks and from landfill gas - analyzes the content of methane and other gases in vents from tanks and collection points from landfills.

Svaggaser TRS

+

Deponigas

+

Contact person

Jörg Brücher

Forsknings- och utvecklingsingenjör

+46 10 516 67 14

Read more about Jörg

Contact Jörg
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

* Mandatory By submitting the form, RISE will process your personal data.

Contact

Cannot find what you are looking for or are you curious about how we can help?

Send message
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

* Mandatory By submitting the form, RISE will process your personal data.

Related

Service

Troubleshooting Provides You with Solutions in Processes and Products

Processes and products are often contaminated for various reasons, leading to operational issues that create economic and environmental consequences, as well as potential customer complaints. RISE's extensive expertise and eq…
Service

Analysis for process chemicals

The chemicals coming out of the process need to be analyzed, controlled, and classified to determine the necessary actions for potential post-processing. Below are some common analyses suggested for process chemicals.
Service

The temperature can affect the viscosity of Viscous liquids

It is possible to measure viscosity with a temperature-controlled bath to determine the relationship between different temperatures and corresponding viscosity values. For some applications, the effect of temperature on the viscos…
Service

Method for analysis of green liquor with green liquor sludge

Separation of green liquor sludge from green liquor acts as the kidney of the chemical pulp processes. As the pulp processes are increasingly closed, the importance of following how and if the composition of the sludge changes to …
Test & demo

XPM - Paper pilot for research

The Experimental Small Paper Machine (XPM) constitutes an important paper pilot and is a cost-effective tool for conducting tests and evaluating new applications for pulp and chemicals. Its cost-effectiveness and ability to genera…
Test & demo

Viscose Pilot Plant

To develop and optimise regenerated cellulose, RISE has two viscose pilots, one on a micro-scale and another one for larger volumes of viscose solution. The pilots consist of six parts which together correspond to an actual viscos…
Service

Fibre Dimensions Important for Pulp Quality

Characterizing pulp often involves a thorough analysis of the fibre composition using a fibre analyzer to control the quality of the pulp. This process is of great importance both in research projects and development projects with…