Dela med andra

Fast Determination of Feedstock Material Properties and Composition by Near-infrared Optical Sensor

Publicerad 2017-10-03

Om uppdragsgivaren
Mälarenergi AB is a city-owned company that supplies electricity, district heating, water, district cooling and fast communication solutions. The company sells electricity to private and corporate customers throughout Sweden. The group is owned by Västerås city and has a turnover of approximately SEK 3 billion. The company operates in Mälardalen and has its headquarters in Västerås.

BillerudKorsnäs AB is a leading supplier of renewable packaging materials and solutions. BillerudKorsnäs AB is a Swedish company that operates in the pulp and forest industry. The company was established in 2012 as a fusion of competing companies i.e. Billerud AB and Korsnäs AB.

Beskrivning av examensarbetet
Composition and properties of the fuel intended for incineration has substantial effect on combustion process performance and formation of environmentally harmful emissions. Fuel composition vary significantly depending on the material source, sorting procedures and other pretreatment methods. In general, it typically contains wood, paper, plastics, textile, other organic materials and further undesired substances including e.g. glass and metals. Important properties of the fuel related to combustion are e.g. heating value, ash content and moisture content etc.

The knowledge of actual composition and properties of the material fed into the boiler is limited to the direct or indirect continuous moisture content measurements and periodic fuel sampling providing elementary composition. This information is not sufficient for process control and performance optimization, particularly when considering strongly heterogeneous fuel feed. Therefore a rapid and reliable technique for fuel characterization is needed.

One of other processes which are strongly affected by the quality of feedstock material is a pulping process which is delivering fibers for further use in the production of paper. The most important quality properties of the feedstock material is content of lignin, which is being dissolved during the process by cooking chemicals, and related material reactivity. One of the biggest challenges in pulp production process is the great variability in feedstock material properties. If the process is not adjusted by welltimed and appropriate operational control measures i.e. control of inlet and outlet flows and setting of the cooking recipe, it will result in low fiber quality or excess use of environmentally harmful cooking chemicals.

Accordingly, a rapid method that is capable of continuous feedstock material characterization is required. Near-infrared NIR spectroscopy offers the possibility be used for rapid and non-destructive characterization of different substances.

Thesis task
Students should therefore evaluate the potential and limitations of using NIR Near Infrared spectroscopy measurements for the characterization of fuel/feedstock material properties and composition and build reliable prediction models from NIR spectra. This involves correlating NIR spectra to specific material properties. The spectroscopy work flow consist of four major steps i.e. sample preparation, spectral data acquisition, data pre-processing and univariate/multivariate calibration.

Group size: 1 min to 4 max students per topic
Credits: 15hp or 30hp
Duration: 10 or 20 weeks

Jan Skvaril
School of bussiness society and engineering,
Future Energy Center,
Mälardalens högskola,
Box 883, 721 23 Västerås, Sweden


Mälardalens University, Future Energy Center, Mälarenergi AB, BillerudKorsnas AB


Sista ansökningdag

2017, 2018

Reference 1
Reference 2
Reference 3

Bookmark and Share