| 초록 |
The environmental impact of high concentrations of CO2 in the atmosphere hasbeen of acute concern to the global community (1). To control and reduce this gas,removal, recovery, storage, disposal and utilization of CO2 have been proposed. For thelast ten years these technologies have been developed in all over the world, especially inadvanced countries. One of these technologies to mitigate this problem is to convertCO2, at the generation point, to valuable industrial feed stocks such as lower olefins andcommercially important high molecular weight hydrocarbons.In our investigation, iron based catalysts were used. These have been shown greatpromise in reverse gas shift (RWGS) reaction and F-T synthesis, which are the twomajor steps involved in the hydrogenation CO2. It was also observed that the additionof potassium to Fe markedly enhanced the production of light olefins and long chainhydrocarbons in CO2 hydrogenation reactions. Among the supports, we found thatalumina is the good support for iron based catalysts in terms of high activity andheavier molecular weight hydrocarbon production(3). We found that Fe-K/Al2O3-MgOcatalysts produce predominantly lower olefins. Apart from these catalyst, we alsodeveloped a catalyst system, modified alumina with lanthanium as supports forpotassium promoted iron catalysts. From these, we can correlate acidic and basicnature of these supports in our prepared catalysts with hydrocarbon product distribution.
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