HOMOGENEOUS GAS-SOLID SUSPENSIONS FOR EFFICIENT DOWNFLOW REACTORS |
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| Authors: | Fabian Zenklusen Lothar Reh |
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| Affiliation: | a Teranol AG/Lalden, Company of Roche, Switzerlandb Institute of Process Engineering (IVUK),Swiss Federal Institute of Technology, Switzerland |
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| Abstract: | In order to increase heat and mass transfer and to accelerate high temperature gas-solids reactions of fine powders, downflow tube-reactors have attracted growing attention. Short reaction times of fractions of a second require short term constant feeding of gas and solids followed by the continuous and rapid formation of homogeneous suspensions with low fluctuations in time to meet required mole ratios. The objective of the present study is the preparation of short-term constant, homogeneous gas-solid suspensions under gravitational flow conditions in downflow reactors. The dynamics of dispersing a very compact dense solids jet lo achieve a homogeneous gas-solid suspension was investigated in a semi-industrial test unit with a maximum solids throughput of 5 t/h and different tube geometries. |
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| Keywords: | Gas/solid suspensions two phase flow solid jet dispersion gas/solid mixing downflow reactors |
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