Biography:

One of their most recent publications is Catalyst dilution for improved performance of laboratory trickle-flow reactors. Which was published in journal Chemical Engineering Science.

More information about J. van Klinken research including statistics on their citations can be found on their Copernicus Academic profile page.

J. van Klinken's Articles: (3)

Catalyst dilution for improved performance of laboratory trickle-flow reactors

AbstractThe low linear liquid velocities in laboratory bench-scale reactors can give rise to flow maldistribution and hence to inefficient use of the catalyst bed. For testing catalysts in their original size and shape at practical space velocities under trickle-flow conditions dilution of the catalyst bed with small inert particles is advocated. The great merit of this bed dilution technique is demonstrated from residence time distributions determined with the help of radiotracers under practical conditions of deep denitrogenation of a vacuum distillate feed. As a result of the addition of small particles axial dispersion is reduced substantially, to the extent that oil plug-flow can be assumed in virtually all practical circumstances. The much higher liquid hold-up in the diluted beds leads to improved wetting and utilization of the catalyst particles as was demonstrated for deep denitrogenation (>99 % nitrogen removal) of a vacuum distillate feedstock under practical conditions.

Wedge-shaped SmCo5 magnets for mini-orange spectrometers

AbstractThe transmission and the versatility of mini-orange spectrometers have been improved by the use of wedge-shaped monolithic permanent magnets of SmCo5. Various configurations offer transmission values around 10% for energies between 0.01 and 3 MeV.

Positron-electron pair spectrometry with selective mini-orange devices

AbstractPair spectrometers have been developed with mini-orange filters and adaptedSi(Li) detectors. They have been employed in searches for resonant Bhabha scattering and viable axions. They are of implicit value for studies of pair creation with the high resolution of solid state detectors, with the high acceptance of mini-orange filters and with high specificity for recognition of e+e− 1090 1568 V 3 pairs. The latter is due to the first-order magnetic focusing and can be further enhanced (optional) by observation of annihilation quanta after detection of a position. Special emphasis is devoted to a fourfold arrangement for Bhabha spectrometry, introducing coincident e+e−-pair observations with a central four-segmented Si(Li) counters in sideways positions for detection of correlated positrons.

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