In:
Thermal Science, National Library of Serbia, , No. 00 ( 2023), p. 153-153
Abstract:
Thermo-chemical conversion of cigarette butt filters (CBFs) waste was
investigated using various thermal analysis techniques (simultaneous
TG-DTG-DTA and DSC methods) at different heating rates in an inert
atmosphere. Thermo- and thermophysical properties of waste material were
discussed, from the point of view of chemical structure and the influence of
experimental parameters on the conversion process. It was established that
acetyl groups of plasticizer (triacetin, TAC) interact with cellulose
acetate (CAc) through dipolar interactions and hydrogen bonding?s. Influence
of these polar interactions can affect the position of glass transition
temperature (Tg) of CBF. Based on estimated value of Tg from DSC analysis,
it was found that CAc present in CBF has degree of substitution (DS) equals
to 2.8 (DS = 2.8), where the presence of cellulose triacetate (CTA) was
confirmed. It was assumed that an increase of DS leads to decline in the
crystallinity. A decline of crystallinity causes the reduction of hydroxyl
groups, leading to less organized chains, and whereby decreasing of
inter-molecular interactions through hydrogen bonding. Based on the
examination of thermophysical characteristics of the tested material, it was
found that both, the heat capacity and the thermal inertia (TI) of material
linearly increase with temperature, during pyrolysis progression. It was
concluded that the type of bio-char produced in this process would have a
large capacity to store the heat, which may depend on the formed particles
size diameter and porosity. Furthermore, it was inferred that magnitude
drops of thermal conductivity (?) after Tg depends on the material
fibrillation.
Type of Medium:
Online Resource
ISSN:
0354-9836
,
2334-7163
DOI:
10.2298/TSCI230520153B
Language:
English
Publisher:
National Library of Serbia
Publication Date:
2023
detail.hit.zdb_id:
2241319-4
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