Chemical Feedstock Recovery via the Pyrolysis of Electronically Heated Tobacco Wastes

Yejin Choi, Sangjae Jeong, Young-Kwon Park, Huijeong Kim, Se-Jeong Lim, Gi-Jeong Woo, Sumin Pyo, Muhammad Zain Siddiqui and Young-Min Kim
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Yejin Choi: Department of Environmental Engineering, Daegu University, Gyeongsan 38453, Korea
Sangjae Jeong: Department of Energy and Environmental Engineering, Soonchunhyang University, Asan 31538, Korea
Young-Kwon Park: School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
Huijeong Kim: Department of Environmental Engineering, Daegu University, Gyeongsan 38453, Korea
Se-Jeong Lim: Department of Environmental Engineering, Daegu University, Gyeongsan 38453, Korea
Gi-Jeong Woo: Department of Environmental Engineering, Daegu University, Gyeongsan 38453, Korea
Sumin Pyo: School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
Muhammad Zain Siddiqui: Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon 24252, Korea
Young-Min Kim: Department of Environmental Engineering, Daegu University, Gyeongsan 38453, Korea

Sustainability, 2021, vol. 13, issue 22, 1-12

Abstract: The pyrolysis of waste electronically heated tobacco (EHT), consisting of tobacco leaves (TL), a poly-lactic acid (PLA) filter, and a cellulose acetate (CA) filter, was investigated using thermogravimetric (TG) and pyrolyzer–gas chromatography/mass spectrometry (Py-GC/MS) analysis. The pyrolytic properties of waste EHT obtained after smoking were comparable to those of fresh EHT. Although the maximum decomposition temperatures (T max S) of waste TL and CA were similar to those of fresh EHT components, the T max of waste PLA was slightly higher than that of fresh PLA due to smoldering. The T max s of PLA and CA were lowered when they were co-pyrolyzed with TL due to interactions between pyrolysis intermediates. The apparent activation energies for the non-isothermal pyrolysis of waste EHT components were higher than those of fresh EHT components. Py-GC/MS analysis results indicated that considerable amounts of chemical feedstocks, such as nicotine and limonene from TL, caprolactone and lactide from PLA, and acetic acid and triacetin from CA, can be recovered by simple pyrolysis of EHT. Co-pyrolysis of TL, PLA, and CA revealed that the experimental amount of lactide was much larger than the calculated value, suggesting its synergistic formation.

Keywords: electronically heated tobacco; pyrolysis; kinetic analysis; chemical feedstock (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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