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Experimental study ...
Experimental study of the moisture distribution inside a pulp sheet using MRI. Part I: Principles of the MRI technique
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Bernada, P (author)
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- Stenström, Stig (author)
- Lund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH
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Mansson, S (author)
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(creator_code:org_t)
- 1998
- 1998
- English.
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In: Journal of Pulp and Paper Science. - 0826-6220. ; 24:12, s. 373-379
- Related links:
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https://lup.lub.lu.s...
Abstract
Subject headings
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- Due to its real advantages in terms of spatial resolution, the MRI technique has been chosen in order to study the internal moisture in 2.5 mm thick industrial pulp samples. A spin-echo sequence with very short echo-time (TE= 2 ms) has been designed to measure moisture content inside highly hygroscopic materials and was able to detect moisture even at very low moisture content (6%). In order to enhance the spin-lattice relaxation process, and thus reduce the total scanning time of an image, the pulp samples were wetted with solutions containing contrasting agents such as copper sulphate. The optimized value of the copper sulphate concentration was finally found to be around 0.5 gL(-1). A calibration curve was utilized to transform the signal intensity into moisture content values. A slight curvature probably due to shrinkage effects appears in the calibration curve.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
Keyword
- bibliographies
- magnetic resonance
- image analysis
- moisture content
- distribution
- pulps
- hand sheets
- copper compounds
Publication and Content Type
- art (subject category)
- ref (subject category)
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