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CAER Seminars

MEMBRANES IN THE FISCHER-TROPSCH SYNTHESIS

Speaker:
Alexander Khassin
Boreskov Institute of Catalysis
Novosibirsk, Russia

Date:
Monday, April 5th, 2004
Time: 3:30 pm
Ben Bandy Conference Room
UK Center for Applied Energy Research

Abstract:
Analysis of the specific features of Fischer-Tropsch synthesis helps to formulate the most important requirements to the FTS reactor. Membrane reactor designs can be useful for the FTS process application. Semi-permeable hydrogen-selective distributors allow control of the H2: CO ratio along the catalyst bed and thus enhance the selectivity of the process. Membranes of extractor type can help to improve the FTS performance by selectively removing water from the reaction volume. On the other hand, plug-through contactor membrane reactor design (PCM) seems to meet all the other requirements, ensuring the high concentration of the catalyst, isothermicity, high gas-liquid interface area, small effective diffusion length and reasonable hydraulic resistance. Varying the membrane composition and conditions of its preparation leads to the changes in porous structure parameters of the PCM membrane. This allows the weakening of the diffusion constrains in a predictable way and, therefore, the control of the productivity and selectivity of the Fischer-Tropsch process.