Combining bi-functional Pt/USY and electromagnetic induction for rapid in-situ adsorption-combustion cycling of gaseous organic pollutant

Jin Chen; Wenjian Xu; Xiaolan Li; Chunqi Wang; Zhongjian Hu; Hongpeng Jia

doi:10.1016/j.jhazmat.2021.128097

Combining bi-functional Pt/USY and electromagnetic induction for rapid in-situ adsorption-combustion cycling of gaseous organic pollutant

J Hazard Mater. 2022 Mar 15:426:128097. doi: 10.1016/j.jhazmat.2021.128097. Epub 2021 Dec 16.

Authors

Jin Chen¹, Wenjian Xu², Xiaolan Li², Chunqi Wang³, Zhongjian Hu⁴, Hongpeng Jia⁵

Affiliations

¹ Xiamen Key Laboratory of Materials for Gaseous Pollutant Control, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
² Xiamen Key Laboratory of Materials for Gaseous Pollutant Control, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
³ Xiamen Key Laboratory of Materials for Gaseous Pollutant Control, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; College of Resource and Environment, Fujian Agriculture and Forest University, Fuzhou 350002, China.
⁴ Nanohmics, Inc., 6201 E. Oltorf St., Austin, TX 78741, USA.
⁵ Xiamen Key Laboratory of Materials for Gaseous Pollutant Control, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: [email protected].

PMID: 34952495
DOI: 10.1016/j.jhazmat.2021.128097

Abstract

By exploiting the superior adsorption capacity of ultra-stable Y-type zeolite (USY) and accurate input of energy by electromagnetic induction field (EMIF) technique, we successfully designed a highly energy-efficient system to eliminate gaseous toluene a common air pollutant. Pristine USY as adsorbent enriches gaseous toluene by a factor of fifteen, via room-temperature adsorption and then EMIF-driven thermal desorption. This operation model involving intermittent heating and mass transfer saves a lot of energy. Especially during temperature rising, 98.9% electric energy can be saved by the EMIF heating in comparison with conventional furnace approaches. In the bi-functional "adsorption-catalytic oxidation" 1Pt/USY, the concentrated toluene undergoes direct oxidation into CO₂ rather than desorption when the EMIF heating starts, so one-step enrichment and mineralization are realized. In addition, the developed bi-functional system operates between adsorption and catalytic decomposition flexibly, which makes it ideal for cleaning VOCs emitted from intermittent sources.

Keywords: Adsorption-combustion cycling; Catalytic oxidation; Electromagnetic induction heating; Volatile organic compounds; Zeolite.