Experimental and simulation studies for reaction enhancement of catalytic CF4 hydrolysis by consecutive HF removal using a multi-stage catalyst-adsorbent reactor

Jae Yun Han, Chang Hyun Kim, Boreum Lee, Seonju Jeong, Hankwon Lim, Kwan Young Lee, Shin Kun Ryi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper, a multi-stage catalyst-adsorbent reactor consisting of a series of catalyst and adsorbent beds is proposed for an effective tetrafluoromethane (CF4) abatement and conversion of corrosive hydrogen fluoride (HF) to CaF2, a useful chemical. Experimentally, enhanced CF4 conversions were observed in multi-stage catalyst-adsorbent reactors compared to a zero-stage reactor (catalyst bed only) confirming sorption-enhanced CF4 hydrolysis due to selective removal of HF during reaction. In addition, some useful design guidelines to select the number of stages and a proper time to replace adsorbents are presented. To develop a process simulation model to represent experimental data, Aspen HYSYS®, a commercial process simulator, was used providing a proper model to match experimental data quite reasonably. Based on experimental and simulative studies, a three- or four-stage catalyst-adsorbent reactor is recommended for CF4 abatement considering both reactor performance and capital/operating expenditures.

Original languageEnglish
Pages (from-to)1141-1149
Number of pages9
JournalGreenhouse Gases: Science and Technology
Volume7
Issue number6
DOIs
Publication statusPublished - 2017 Dec 1

Keywords

  • CaF
  • calcium hydroxide
  • CF hydrolysis
  • PFCs
  • process simulation

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry

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