Nayanna Shayra Silva Taveira

Mrs. Nayanna Shayra Silva Taveira


Research Focus & Metrics

Academic Career Length

2Years (2025-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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3 December 2025 in Biomass
Verified
Journal Article
Open access
PDF file
NTNayanna Shayra Silva Taveira
Nayanna Shayra Silva Taveira
DSDaniel Silveira Serra
Daniel Silveira Serra
Morsyleide de RosaMorsyleide de Rosa
Morsyleide de Rosa
RGRubens Sonsol Gondim
Rubens Sonsol Gondim
MOMona Lisa Moura de Oliveira
Mona Lisa Moura de Oliveira
MFMaria Cléa Brito Figueirêdo
Maria Cléa Brito Figueirêdo
Green coconut husk is an abundant and underutilized agro-industrial residue in Brazil, contributing significantly to landfill overload. This study investigates the pyrolysis of pellets derived from this biomass as a technological alternative for its valorization, focusing on the integrated characterization of the three resulting products. Pellets were subjected to pyrolysis in a fixed-bed reactor under two distinct conditions: at 400 °C to maximize biochar production, and at 600 °C to enhance gas generation. The raw material and resulting solid, liquid, and gaseous fractions were characterized using physicochemical, thermal, morphological, and chromatographic analyses. Pyrolysis at 400 °C yielded biochar with high fixed carbon content (67.03%) and elevated heating value (27.80 MJ/kg), suitable for soil amendment and carbon sequestration. At 600 °C, the non-condensable gas exhibited a higher hydrogen concentration (35.84%) and an H2/CO ratio of 1.84, favorable for chemical synthesis applications. Notably, palletization resulted in a significant bio-oil and gas yield even under 400 °C. The bio-oil underwent chemical upgrading, which significantly increased the phenolic content and raised its heating value to 20.40 MJ/kg. Additionally, combustion tests revealed that the gas produced emitted lower levels of NOx compared to natural gas.