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Fluidized-Bed Membrane Reactor


With the combined structures of the well-known fluidized bed with the membrane reactor a clear increase in the efficiency of the selective oxidative conversion for higher alkanes can be achieved.


The conversion of methane into higher hydrocarbons, such as ethane or ethylene, is still a big challenge in the field of catalysis, mainly because the activation of methane is difficult due to its thermo-dynamical stability. Especially the efficiency of oxidative methane coupling is a major problem in currently available systems. Current methods achieve a high selectivity in the conversion of methane, but only a minor yield of higher alkanes, which are the primary goal of the conversion of methane. 

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The combined structures of the well-known fluidized bed reactors and membrane reactor that are offered with thsi invention can achieve a notable increase of the efficiency of the selective oxidative conversion for higher alkanes.

First results

First experiments reached a methane conversion of 39 %, a selectivity of 56 % and a yield of 22 %, in contrast to common techniques with a methane conversion of only 39 %, a selectivity of 37 % and a yield of 14.5 %.


  • Reactor design as well as membrane dosing avoid thermal afterburning
  • Fine distribution of oxygen ensures a selective process performance
  • Fluidized behaviour of the catalyst bed enables a homogeneous and isothermal catalytic area
  • Easy to scale up for industry requirements


The fluidized-bed membrane reactor is suitable for oxidative coupling of methane as well as heterogeneous catalysis in general in the chemical industry.


Chances for Collaboration

  • R&D Cooperation
  • Patent Purchase
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Technische Universität Berlin

Jeanne Trommer
+49 30 314 24472
Fraunhoferstr. 33-36
10587 Berlin




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PBMR, higher alkanes, increased yield, methane, OCM, oxidative coupling, reactor

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