Thermochemical conversion of silkworm by-product into syngas.

Autor: Kim JY; Department of Earth Resources & Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea., Kwon D; Department of Earth Resources & Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea., Jung S; Department of Environmental Engineering, Kyungpook National University, Daegu 41566, Republic of Korea., Tsang YF; Department of Science and Environmental Studies and State Key Laboratory in Marine Pollution, The Education University of Hong Kong, Tai Po, New Territories 999077, Hong Kong., Kwon EE; Department of Earth Resources & Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea. Electronic address: ek2148@hanyang.ac.kr.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2024 Apr; Vol. 265 (Pt 1), pp. 130956. Date of Electronic Publication: 2024 Mar 16.
DOI: 10.1016/j.ijbiomac.2024.130956
Abstrakt: This study explored the valorisation of silkworm by-product, a major by-product of the silk industry (sericulture), which amounts to 16 million tonnes annually. The focus was on transforming waste into energy resources through pyrolysis under CO 2 conditions. In one-stage pyrolysis, the evolution of syngas under N 2 was found to be comparable to that under CO 2 . A notable allocation of carbon to biocrude rather than syngas was observed. The two-stage pyrolysis resulted in increased syngas production. However, achieving a homogeneous reaction between CO 2 and the volatiles liberated from silkworm byproduct proved challenging. Indeed, the reaction kinetics governing CO 2 reactivity was not fast although the temperature windows of the reaction were aligned in the two-stage pyrolysis. To address this issue, pyrolysis was performed using a Ni-based catalyst to expedite the reaction kinetics. Consequently, syngas formation, particularly CO formation, was significantly enhanced under CO 2 conditions compared to that under N 2 conditions. The syngas yield under CO 2 was 36.42 wt% which was 2-fold higher than that of N 2 . This suggested the potential of CO 2 altering the carbon distribution from biocrude to syngas. This strategy would contribute to the establishment of sustainable production of silk by converting sericulture by-product into energy/chemical resources.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: