Biochar-advanced thermocatalytic salvaging of the waste disposable mask with the production of hydrogen and mono-aromatic hydrocarbons

Chenxi Wang, Rongge Zou, Hanwu Lei, Moriko Qian, Xiaona Lin, Wendy Mateo, Lu Wang, Xuesong Zhang, Roger Ruan

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

The salvaging of the waste disposable mask was conducted in this study through catalytic pyrolysis over corn stover derived biochar catalyst combined with the boosted generation of hydrogen and mono-aromatic hydrocarbons for the first time. In the absence of biochar, up to 53 wt% of wax was observed at 550 ºC, whereas at the biochar/mask ratio of 2, around 41 wt% of liquid oil was produced without the formation of wax. The hydrogen content in the gas stream was about 26 vol% at 600 ºC for non-catalytic pyrolysis, which increased to around 55 vol% at the expense of light hydrocarbons such as methane and C2–4 for the catalytic process with the biochar/mask ratio of 3. In resulting liquid oil, the content of mono-aromatics, especially toluene, xylenes, and ethylbenzene was about 55% for catalytic runs, which was far greater than that of 38% from the non-catalytic run. Interestingly, the dyes released from mask pyrolysis could be completely captured/adsorbed by biochar, leading to a much cleaner oil. After 10 cycles of reuse at 600 ºC without regeneration, the biochar still held a good selectivity toward hydrogen and mono-aromatic hydrocarbons. This study exemplified a readily accessible concept and pathway of ‘waste against waste’ targeted to upcycle waste disposable masks over biochar from biomass waste.

Original languageEnglish (US)
Article number128080
JournalJournal of Hazardous Materials
Volume426
DOIs
StatePublished - Mar 15 2022

Bibliographical note

Funding Information:
This work is only supported by National Institute of Food and Agriculture (NIFA), awards AFRI, United States Department of Agriculture (USDA) for funding this work through the Agriculture and Food Research Initiative (AFRI) is a leading competitive grants program (Grant no. 2016–67021-24533 and 2018-67009-27904 ). We would thank Dr. Aftab Ahamed for his help with the GC/MS analysis in Bioproducts, Sciences, & Engineering Laboratory (BSEL), and express our gratitude to Jonathan Lomber, Kalidas Mainali, and Sohrab Mood for performing FT-IR, TGA, heating value, ultimate and proximate analysis in Analytical Chemistry Service Center (ACSC). We also acknowledge Dr. Valerie Lynch-Holm and Dr. Dan Mullendore in Franceschi Microscopy & Imaging Center (FMIC) at Washington State University for the SEM analysis in this study. We thank Michelle Lei for the English language editing.

Funding Information:
This work is only supported by National Institute of Food and Agriculture (NIFA), awards AFRI, United States Department of Agriculture (USDA) for funding this work through the Agriculture and Food Research Initiative (AFRI) is a leading competitive grants program (Grant no. 2016?67021-24533 and 2018-67009-27904). We would thank Dr. Aftab Ahamed for his help with the GC/MS analysis in Bioproducts, Sciences, & Engineering Laboratory (BSEL), and express our gratitude to Jonathan Lomber, Kalidas Mainali, and Sohrab Mood for performing FT-IR, TGA, heating value, ultimate and proximate analysis in Analytical Chemistry Service Center (ACSC). We also acknowledge Dr. Valerie Lynch-Holm and Dr. Dan Mullendore in Franceschi Microscopy & Imaging Center (FMIC) at Washington State University for the SEM analysis in this study. We thank Michelle Lei for the English language editing.

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

  • Biochar
  • Catalytic pyrolysis
  • Hydrogen
  • Mono-aromatic hydrocarbon
  • Waste disposable mask

PubMed: MeSH publication types

  • Journal Article
  • Research Support, U.S. Gov't, Non-P.H.S.

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