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Parameter setting on catalytic controller: Using Design of Experiments and Scanning Electron Microscope Analysis
Jönköping University, School of Engineering, JTH, Product Development.
Jönköping University, School of Engineering, JTH, Product Development.
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Parameter setting on catalytic controller : Using Design of Experiments and Scanning Electron Microscope Analysis (English)
Abstract [en]

This thesis work has been conducted in the Handheld Laboratory at Husqvarna AB with the purpose of finding the parameters responsible for the performance of the catalytic converters used in the test rig. The catalytic converters are used in the test rig during the long term testing of the chain saws to reduce the hydrocarbon content from the exhaust before it enters into the environment.  

To perform this research two approaches were carried out. One with Design of Experiment (DOE) and another using Scanning Electron Microscope (SEM) analysis. In Design of Experiments parameters that are suspected to be influencing the performance of the catalytic converter were refined. Using these parameters a test plan is made with the help of statistical analysis application Minitab and the tests were carried out in the test rig. Using SEM the effects of aging and its effect on microstructure and chemical composition on the catalyst surface was analyzed.

The results from the DoE shows that the exhaust flow, collector diameter and distance to the muffler are responsible for the collection of exhaust. Distance to the muffler and collector length are the factors affecting the conversion of the exhaust. In addition to that exhaust flow is also responsible for the duration of heating coil running time.       

The results from the SEM analysis shows that the operating temperature is high due to which there is thermal degradation of catalyst and there is also deactivation due to fouling. Another finding is that the flow on to the catalyst is not uniformly distributed 

Place, publisher, year, edition, pages
2017. , 62 p.
Keyword [en]
Design of Experiments, Catalytic converter, Catalyst deactivation, Engine emission control, Scanning Electron Microscope
National Category
Vehicle Engineering Environmental Engineering
Identifiers
URN: urn:nbn:se:hj:diva-36115ISRN: JU-JTH-PRU-2-20170067OAI: oai:DiVA.org:hj-36115DiVA: diva2:1109988
External cooperation
Husqvarna Group AB
Subject / course
JTH, Product Development
Supervisors
Examiners
Available from: 2017-06-16 Created: 2017-06-15 Last updated: 2017-06-16Bibliographically approved

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Parameter setting on catalytic controller(3360 kB)24 downloads
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