The results from studies on Fischer Tropsch synthesis wherein syngas was dissolved in CO2 are presented. In addition, CO2 reduction by hydrogen under these conditions were also analyzed. It was found that the CO2 behaves both as a solvent/diluent as well as a reactant. The use of CO2 as a solvent was found to suppress the CO2 and CH4 selectivity while enhancing the C5+ hydrocarbon selectivity and CO conversion. The effect of CO2 partial pressure, reactor pressure, reaction temperature, CO2 content in the feed and H2:CO ratio in syngas on the liquid product distribution are also presented. Some of the notable findings include negative CO2 selectivities while obtaining nearly 98 % CO conversion. Increasing the reactor pressure was found to favor longer chain growth. It was observed that the process enhanced the life of the catalyst as well as afforded pressure tunable product fractionation. Finally, the effect of the recycle of product gases on the conversion and selectivities were evaluated. It was found that the recycle of the product gases resulted in an increase in conversion and liquid selectivity although the carbon chain distribution was found to slightly favor lower carbon numbers.

Fischer Tropsch synthesis in compressed CO<sub>2</sub>

245th National Meeting (2013)

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Fischer Tropsch synthesis in compressed CO2

Fischer Tropsch synthesis in compressed CO₂