Case Study
Case Study
Case Study
Case Study
Case Study

8-Parallel Temkin Reactors

for Eggshell Catalyst Testing of VAM Catalysts
The task

A number of years ago, Clariant chose to significantly increase their capabilities in partial oxidation catalysts. As part of this initiative the decision was made to improve their Vinyl Acetate Monomer (VAM) catalyst technology.

Clariant is one of ILS’ oldest clients and has a proven track record of making highly-customized units for them. For this reason ILS was chosen as a supplier of two, high-throughput Temkin-type reactors systems.
The ILS solution

The advanced Temkin reactor designed by ILS was an improvement upon the original Temkin reactor system developed at the University of Moscow in the 70’s.

The Temkin reactor has the unique ability to make it possible to test eggshell-type catalysts without requiring crushing and seiving, which would otherwise result in mostly inert material being tested.

ILS worked closely with Clariant on this project to develop a Temkin module design that was flexible, had minimal bypassing and excellent plug-flow characteristics. The plug-flow means that high conversion levels can be attained and high interstitial linear flow velocities result in excellent heat transfer and prevent film-diffusion effects from masking catalst performance. The unit has a downstream nitrogen purge system combined with a custom heated-valve oven, which prevents VAM condensation and self-polymerization, which can potentially lead to blockage of downstream tubing. Full integration of online GC-analytics as well as a total combustion reactor for reacting unconverted material to CO2 and water resulted in a complete, turn-key system.

The result

Two of these units were successfully constructed and commissioned for Clariant

They have proven to be the workhorse of the VAM catalyst development group and have been integral in helping Clariant develop their latest generations of commercial VAM catalysts.
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