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Kayıt Tarihi: 2021-13-Ocak
Aktif Durum: Pasif
Gönderilenler: 30
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| Gönderen: 2021-15-Ocak Saat 05:45 | Kayıtlı IP
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Synthesis of activated carbon from high-carbon coal fly
ash and its hydrogen storage application
https://www.wyact
ivatedcarbon.comActivated carbons (ACs) have
desirable characteristics that make them attractive for
many industrial applications. In order to reduce their
production cost, there is always a need to find
alternative low-cost feedstock precursors. Nowadays zero-
waste technologies play an important role in sustainable
development, therefore using of coal by-product as source
of AC is strongly recommended. In this study, coal fly
ash (CFA) sample with a high unburned carbon content was
used to synthesize ACs. The effect of acid pre-treatment
of the CFA sample using HF and HCl prior to
thermochemical activation using KOH was also
investigated. The acid washing was found to be effective
since it removed most of the inorganic components found
in the CFA, as was confirmed by EDS and XRF. The
resulting carbon-rich feedstock had relatively high
content of meso-/macropores as well as with relative
increase in specific surface area (46.19 m2/g - 81.20
m2/g). The obtained AC sample was found to exhibit high
specific surface (946.77 m2/g) that was dominated by high
microporosity and was tested for hydrogen storage.
activated-carbon/activated-carbon-gold-
extraction.html">activated carbon gold recovery The
H2 uptake (1 bar, 77 K) was found to be 1.35 wt% and with
a predictable potential for even higher capacity when
measurements are conducted at high pressures.
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Konu: Synthesis of activated carbon
