Sorption enhanced catalytic CF4 hydrolysis with a three-stage catalyst-adsorbent reactor
Jae-Yun Han , Chang-Hyun Kim , Boreum Lee , Sung-Chan Nam , Ho-Young Jung , Hankwon Lim , Kwan-Young Lee , Shin-Kun Ryi
Front. Chem. Sci. Eng. ›› 2017, Vol. 11 ›› Issue (4) : 537 -544.
Sorption enhanced catalytic CF4 hydrolysis with a three-stage catalyst-adsorbent reactor
In this study, we developed a three-stage catalyst-adsorbent reactor for the catalytic hydrolysis of CF4. Each stage is composed of a catalyst bed followed by an adsorbent bed using Ca(OH)2 to remove HF. The three stages are connected in series to enhance the hydrolysis of CF4 and eliminate a scrubber to dissolve HF in water at the same time. With a 10 wt-% Ce/Al2O3 catalyst prepared by the incipient wetness method using boehmite and a granular calcium hydroxide as an adsorbent, the CF4 conversion in our proposed reactor was 7%–23% higher than that in a conventional single-bed catalytic reactor in the temperature range of 923–1023 K. In addition, experimental and numerical simulation (Aspen HYSYS®) results showed a reasonable trend of increased CF4 conversion with the adsorbent added and these results can be used as a useful design guideline for our newly proposed multistage reactor system.
PFCs / catalytic hydrolysis / calcium hydroxide / sorption enhanced / process simulation
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Higher Education Press and Springer-Verlag GmbH Germany
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