Sodium lignosulfonate: a renewable corrosion inhibitor extracted from lignocellulosic waste

In this study, sodium lignosulfonate was extracted from a natural lignocellulose waste and its characterization and potential application as a corrosion inhibitor were investigated. FTIR results confirmed presence of sulfonic groups like ones in a commercial sample. The aqueous solubility of sodium...

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Bibliographic Details
Published in:Biomass conversion and biorefinery 2024-03, Vol.14 (6), p.7531-7541
Main Authors: Abdelrahman, Nour S., Galiwango, Emmanuel, Al-Marzouqi, Ali H., Mahmoud, Eyas
Format: Article
Language:English
Subjects:
Biotechnology
Caustic soda
Corrosion inhibitors
Corrosion potential
Corrosion rate
Corrosion tests
Energy
Lignin
Lignocellulose
Lignosulfonates
Original Article
Orthogonal arrays
Reaction time
Renewable and Green Energy
Sodium
Sodium hydroxide
Solubility
Sulfonic acid
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Summary:In this study, sodium lignosulfonate was extracted from a natural lignocellulose waste and its characterization and potential application as a corrosion inhibitor were investigated. FTIR results confirmed presence of sulfonic groups like ones in a commercial sample. The aqueous solubility of sodium lignosulfonate increased from 29.17 to 88.58 wt% when reaction time was increased from 1 to 4 h. Corrosion inhibition efficiency of 90.23% was obtained. The main factors of lignin concentration (10–25 g/L), temperature (80–140 °C), reaction time (1–4 h), sodium hydroxymethyl sulfonate/lignin mole ratio (0.3–1.2), and sodium hydroxide concentration (0.25–1 M) were investigated for their effect towards the aqueous solubility of sodium lignosulfonate. The Taguchi orthogonal array statistical design was used to investigate effects of factors, their interactions, and the optimum values within factor levels towards solubility as the response. The solubility of the sodium lignosulfonate was found to be more significantly influenced by reaction time > lignin concentration > sodium hydroxide > temperature > reactants/lignin ratio. The optimum condition for sulfomethylation reaction was found to be 4 h, 100 °C, 25 g/L, 0.9, and 0.5 M for reaction time, temperature, lignin concentration, reactant/lignin ratio, and NaOH concentration, respectively. The corrosion test revealed a reduction in corrosion rate from 2.6 to 1.2 mm/year when the concentration of the sodium lignosulfonate was increased from 0 to 8 ppm.
ISSN:2190-6815
2190-6823
DOI:10.1007/s13399-022-02902-6