Inertization of metals and hydrogen production as a byproduct from water hyacinth and water lettuce via plasma pyrolysis

Sanito, Raynard Christianson; Lidwina, Cindy; Yang, Hsi-Hsien; Wang, Ya-Fen

doi:10.1016/j.heliyon.2022.e11240

Cited by 5 publications

(1 citation statement)

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“…As the HTC temperature increased, the peak at 1428 cm -1 became more intense, which is due to the transformation from calcite to vaterite phases [8]. Additionally, the peak at 1112 cm -1 and 1033 cm -1 are associated with the C-O stretching mode of carbons and suppressed at high HTC temperatures and times [9]. Furthermore, the surface area and porosity of all samples were evaluated from the N2 adsorptiondesorption isotherms in Figure 2b.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of calcium carbonate/carbon from water lettuce via hydrothermal carbonization process

Chaiammart

THU

Srisuk

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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The conversion of biomass into value-added products has recently received much attention for a broad range of applications. In this work, water lettuce was converted into calcium carbonate (CaCO3)/carbon via hydrothermal carbonization (HTC) and pyrolysis at 900 °C. The HTC temperature and time varied in the range of 160–200 °C for 6–18 h, respectively. X-ray diffraction analysis indicated that the samples consisted of a mixture of calcite and vaterite phases of CaCO3 and amorphous carbon. The ratio of calcite and vaterite phases varied with HTC time. The Fourier transform infrared spectroscopy (FTIR) result showed the characteristic absorption bands confirming the presence of CaCO3. Scanning electron microscopy (SEM) images revealed the large crystal of CaCO3 and fine carbon particles. From the N2 sorption analysis, the sample prepared from the HTC at 200 °C for 6 h had the highest specific surface area of 95 m2/g due to the development of micropores. The results presented in this work demonstrated that both HTC temperature and time play critical roles in altering the surface area and phase structure of CaCO3/carbon. The CaCO3/carbon derived from water lettuce can potentially be used and adapted for many applications.

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Section: Resultsmentioning

confidence: 99%