Study of catalytic combustion of chlorobenzene and temperature programmed reactions over CrCeOx/AlFe pillared clay catalysts

Yingnan Qiu, Na Ye, Danna Situ, Shufeng Zuo, Xianqin Wang

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In this study, both AlFe composite pillaring agents and AlFe pillared clays (AlFe-PILC) were synthesized via a facile process developed by our group, after which mixed Cr and Ce precursors were impregnated on AlFe-PILC. Catalytic combustion of organic pollutant chlorobenzene (CB) on CrCe/AlFe-PILC catalysts were systematically studied. AlFe-PILC displayed very high thermal stability and large BET surface area (SBET). After 4 h of calcination at 550 °C, the basal spacing (d001) and SBET of AlFe-PILC was still maintained at 1.91 nm and 318 m2/g, respectively. Large SBET and d001-value, along with the strong interaction between the carrier and active components, improved the adsorption/desorption of CB and O2. When the desorption temperatures of CB and O2 got closer to the CB combustion temperature, the CB conversion could be increased to a higher level. CB combustion on CrCe/AlFe-PILC catalyst was determined using a Langmuir-Hinshelwood mechanism. Adsorption/desorption/oxidation properties were critical to design highly efficient catalysts for CB degradation. Besides, CrCe/AlFe-PILC also displayed good durability for CB combustion, whether in a humid environment or in the presence of volatile organic compound (VOC), making the catalyst an excellent material for eliminating chlorinated VOCs.

Original languageEnglish (US)
Article number728
JournalMaterials
Volume12
Issue number5
DOIs
StatePublished - Mar 1 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Keywords

  • AlFe-pillared clay
  • Catalytic combustion
  • Chlorobenzene
  • CrCeOx
  • Temperatureprogrammed reaction

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