NDLI: Positrons as in situ probes of transient phenomena

Content Provider	Springer Nature Link
Author	Anderson, B.G. van Santen, R.A. de Jong, A.M.
Copyright Year	1999
Abstract	Techniques such as positron emission tomography (PET), positron emission particle tracking (PEPT) and positron emission profiling (PEP) are currently used to perform in situ studies of physical and chemical phenomena that occur within chemical reactors and other processing equipment under process conditions. PEPT is capable of measuring the flow patterns inside mixers and fluidized‐bed reactors by tracking a labelled particle. Currently a particle as small as 500 μm moving at 0.1 m/s can be continuously located with a resolution of 5 mm. The ability to perform such measurements greatly aids in the development and optimisation of such systems. PET and PEP are being employed to perform measurements of the concentration of molecules labelled by $^{11}$C, $^{13}$N and $^{15}$O inside packed‐bed reactors. The measured concentration distributions, as a function of position and time, are used as input for mathematical models based on the kinetics of the physical (e.g., diffusion, adsorption) or chemical processes occurring.
Starting Page	125
Ending Page	131
Page Count	7
File Format	PDF
ISSN	10225528
Journal	Topics in Catalysis
Volume Number	8
Issue Number	1-2
e-ISSN	15729028
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	1999-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Industrial Chemistry/Chemical Engineering Catalysis Characterization and Evaluation Materials Pharmacy
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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