| 초록 |
Propane dehydrogenation (PDH) to propylene has attracted tremendous due to limited capabilities of cracking process and abundance of light alkane from shale gases. Two processes, Oleflex in moving-beds and Catofin in fixed-beds, are commercially operated using Pt-Sn and CrOx catalysts. We introduce a new FPDH process which is operated in a fast fluidized-beds with a few seconds of residence time. Fluidized-bed PDH offers the advantages such as high energy efficiency of heat-supply and higher mobility of catalyst for regeneration. However, the catalytic behavior is quite different in an initial few seconds and the activity is lower due to short residence time and diffusion limitations. Although Pt-Sn and CrOx are generally known as excellent PDH catalysts, they only active to side-reaction producing CH4/C2H6 or COx in an initial few seconds. Herein, unique catalytic behaviors of CrOx catalyst is studied in an induction period, and we suggest the strategy for catalyst design in FPDH. |
