The Effect of Altering CO2-Conversion in Iron-Based Direct CO2-Hydrogenation: A Comparison Between Fixed Bed and Slurry Phase Operation
摘要
Globally anthropogenic CO2 release poses a major problem of its effect on climate change and global warming. However, despite the large total amount of CO2 released CO2 point sources tend to be rather small. Thus, a modular approach may prove of great importance to the potential to utilize CO2 through direct CO2-hydrogenation integrated with CO2 point sources rather than as full-scale industrial plants. Subsequently a kinetic study was done on the direct CO2-hydrogenation reaction by altering the space velocity and thus the CO2-conversion, in a slurry phase reactor. The results indicate that fixed bed reactors should be able to achieve significantly higher conversions of CO2 at similar space time. At this stage the effect of operating on product selectivity in fixed bed reactors compared to slurry phase, as well as the difference in catalyst evolution, requires further assessment. However, understanding the interplay between slurry phase and fixed bed phase reactions may prove crucial to the potential to industrialise direct CO2-hydrogenation.-->-->