Eco-friendly corrosion inhibitors based on Cashew nut shell liquid (CNSL) for acidizing fluids

Furtado, Luana B.; Nascimento, Rafaela C.; Seidl, Peter Rudolf; Guimarães, Marcos Duarte; Costa, Leonardo Moreira da; Rocha, Janaina Cardozo da; Gomes, José Antônio da Cunha Ponciano

doi:10.1016/j.molliq.2019.02.083

Cited by 42 publications

(9 citation statements)

References 57 publications

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“…CNSL is a low cost, effective, renewable, and technologically significant raw material suitable as a replacement for synthetic phenols in various industries [18]. In the oil and gas industry, cashew nutshell liquid and its derivatives have been found to be good corrosion inhibitors and flow improvers for waxy and heavy crude oil [7,12,31]. Polyethylene glycol and diethanolamine esters of natural cashew nutshell liquid as well as formaldehyde-novolac resins of distilled cashew nutshell liquid were effective as crude oil wax dispersants/inhibitors and pour point depressants [8,9,17,18] reported the extensive use of cardanol and cardol and their derivatives as additives for the production of surfactants, resins, and polymers.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of modified cashew nutshell liquid as natural surfactants for chemical flooding in sandstone oil reservoirs

2022

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Bio-based oilfield chemicals are gaining attention due to their availability, cost-effectiveness, and non-toxic nature. Surfactants facilitate recovery of residual oil by reducing the interfacial tension between two immiscible fluids. Cashew nutshell liquid (CNSL) extracted from Anacardium occidentale waste shells was modified using triethanolamine and evaluated as a natural alternative to traditional surfactants. Phase behavior analysis, interfacial tension, critical micelle concentration (CMC) measurements, and core flooding analysis were performed to ascertain the compatibility and recoverability of the cashew nutshell liquid derivatives on sandstone reservoirs. Interfacial tension was reduced from 10.46 to 1.66 mN/m at CMC of 1 g/L. Additional recovery factor and displacement efficiency of 12% OOIP and 32.5%, respectively, was achieved at laboratory temperature. The effect of temperature on residual oil recovery was determined by subjecting the oil displacement experiment to reservoir temperature of 80˚C, resulting in recovery factor and displacement efficiency of 9% OOIP and 25%, respectively.

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Section: Introductionmentioning

confidence: 99%

Evaluation of modified cashew nutshell liquid as natural surfactants for chemical flooding in sandstone oil reservoirs

2022

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“…The greater size and rigidity of P30 (higher M w ) resulted in lower diffusion towards the metallic surface in the liquid phase at a lower temperature (298 K when compared to 333 K of the WL measurements). This explains that P20 is better able to approach the metallic surface at the low temperature and exposure time of the electrochemical tests when compared to P30 26 . Therefore, the mobility is associated with lower molecular volume of the polymeric structure, resulting in more efficient coverage of the metallic surface and higher inhibition efficiencies.…”

Section: Linear Polarization Resistance (Lpr) Measurementsmentioning

confidence: 96%

“…These inhibitors should be easily available, low cost and exhibit high inhibition efficiency 11,12 . Green corrosion inhibitors have been developed from a variety of sources, including leaves 11,[13][14][15] , seeds [16][17][18][19][20] , fruits 21 , flowers 22 , peel [23][24][25] and residual biomass 26 .…”

Section: Introductionmentioning

confidence: 99%

Green Eugenol Oligomers as Corrosion Inhibitors for Carbon Steel in 1M HCl

et al. 2022

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“…The spectra also exhibit bands at 2983-2714, 2983-2815 and 2962-2813 cm -1 for SB1, SB2, and SB3, respectively, which are related to the C sp3 -H stretch of aromatic rings. There are also bands at 807-838 cm -1 for angular deformation of C-H from 1,4-disubstituted aromatic ring phenol 23,24 . In the spectra of SB2, there are also bands at 724 and 779 cm -1 related to C-H angular deformation from 1,2-disubstituted aromatic ring phenol 23 .…”

Section: Ftirmentioning

confidence: 99%

Experimental and Theoretical Studies of Tailor-made Schiff Bases as Corrosion Inhibitors for Carbon Steel in HCl

et al. 2023

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Strong acids used in industrial applications as cleaning, descaling, among others, can severely damage metallic structures, requiring corrosion inhibitors to diminish or avoid these issues. Since many conventional compounds used for this purpose may result in environmental and human health issues, eco-friendly compounds such as Schiff bases have been recently investigated. The synthesis of three novel Schiff bases (SBs) was confirmed by infrared spectroscopy (FTIR) and hydrogen nuclear magnetic resonance ( 1 H-NMR). Weight loss measurements were carried out in 1 M HCl over 303K-333K. Furthermore, the combination of these compounds with a surfactant improved the efficiencies, reaching an efficiency of 93%. Optical and scanning electron microscopies confirmed the reduced roughness and pit depths of carbon steel samples. Density-functional theory calculations for neutral forms of SBs revealed that the geometrical and the energetical parameters are similar for the three studied SBs. The geometrical results exhibited more planar structures of protonated species, improving the chemical and physical interactions between aromatic rings and metallic atoms.

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Eco-friendly corrosion inhibitors based on Cashew nut shell liquid (CNSL) for acidizing fluids

Cited by 42 publications

References 57 publications

Evaluation of modified cashew nutshell liquid as natural surfactants for chemical flooding in sandstone oil reservoirs

Evaluation of modified cashew nutshell liquid as natural surfactants for chemical flooding in sandstone oil reservoirs

Green Eugenol Oligomers as Corrosion Inhibitors for Carbon Steel in 1M HCl

Experimental and Theoretical Studies of Tailor-made Schiff Bases as Corrosion Inhibitors for Carbon Steel in HCl

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