Evaluation of Scale and Corrosion Inhibition of Modified Polyaspartic Acid

Chen, Jianxin; Chen, Fengjiang; Han, Jian; Su, Min; Li, Yinhui

doi:10.1002/ceat.201900518

Cited by 22 publications

(13 citation statements)

References 39 publications

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“…It is well-known that polyaspartic-acid-based amide linkage is widely used as green SI in industrial circulating cooling water and topside petroleum applications. Many research groups have synthesized and investigated antiscaling evaluation of modified polyaspartic acid for industrial cooling water systems at low temperatures. − The main problem of polyaspartic acid derivatives is being not thermally stable under harsh reservoir conditions, affording short squeeze lifetimes. Polyaspartic acid can be applied in squeeze applications at only 85 °C .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Study of Modified Polyaspartic Acid Coupled Phosphonate and Sulfonate Moieties As Green Oilfield Scale Inhibitors

Mady

Rehman

Kelland

2021

Ind. Eng. Chem. Res.

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The petroleum industry has strived for several years to explore environmentally friendly scale inhibitors with no acute environmental impact. Well-known industrial biodegradable polyaspartic acid is widely used as a potent scale inhibitor (SI) against various inorganic scales in industrial circulating cooling water and topside petroleum applications. However, polyaspartic acid showed weak thermal stability at the petroleum reservoir temperatures. Here, we attempt to develop a new class of polyaspartic acid for squeeze treatment applications under harsh conditions. In this project, a series of modified polyaspartic acid, including pendant anionic functional moieties (phosphonate and sulfonate) were synthesized and investigated as new SIs to inhibit the calcium carbonate (calcite, CaCO3) and barium sulfate (barite, BaSO4) scales under oilfield conditions. These classes were synthesized via aminolysis of polysuccinimide with nucleophilic amine reagents under alkaline conditions. The products are polyaspartic acid-capped aminomethylene phosphonic acid (SI-2), polyaspartic acid-capped bisphosphonic acid (SI-3), polyaspartic acid-capped aminomethanesulfonic acid (SI-4), and polyaspartic acid-capped aminoethanesulfonic acid (SI-5), as well as in-house synthesized polyaspartic acid (SI-1). The scale inhibition activities of these compounds against carbonate and sulfate scales were determined using the dynamic scale loop test at 100 °C and 80 bar. Furthermore, the long-term thermal aging and calcium tolerance experiments were also investigated. It was found that polyaspartic-acid-capped aminomethylene phosphonic acid (SI-2) gave outstanding calcite scale inhibition performance and showed excellent thermal stability at 130 °C for 7 days compared to SI-1 and other modified SIs (SI-3-SI-5). This phosphonated polymer also exhibited superior calcium tolerance performance with Ca2+ ions up to 100 ppm, and moderate performance in the range of 1000–10 000 ppm calcium ions. This project highlights the success of designing and developing a new environmentally friendly calcite SI-based polyaspartic acid under harsh oilfield conditions.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Study of Modified Polyaspartic Acid Coupled Phosphonate and Sulfonate Moieties As Green Oilfield Scale Inhibitors

Mady

Rehman

Kelland

2021

Ind. Eng. Chem. Res.

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“…6b and c show the XPS spectra of calcium carbonate scale O 1s generated after adding PESA and Arg‐PESA. The XPS spectra of O 1s of the calcium carbonate scale without adding scale inhibitors had been studied by Chen et al 24. The peaks at 531.26 and 531.7 eV indicated the presence of oxygen in calcium carbonate.…”

Section: Resultsmentioning

confidence: 99%

“…Protein materials can effectively reduce the incidence of scaling [11]. Chen et al [22][23][24] modified PASP with a variety of amino acids. At a low dosage, the modified product exhibited excellent scale and corrosion inhibition performance; they also had excellent dispersion ability for iron oxide.…”

Section: Kunfei Zhangmentioning

confidence: 99%

“…Compared with PESA, Arg-PESA exhibited better performance and it was more suitable for industrial circulating water systems.Figs.6b and cshow the XPS spectra of calcium carbonate scale O 1s generated after adding PESA and Arg-PESA. The XPS spectra of O 1s of the calcium carbonate scale without adding scale inhibitors had been studied by Chen et al[24]. The peaks at 531 26.…”

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confidence: 99%

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Evaluation of Arginine‐Modified Polyepoxysuccinic Acid as Anti‐scaling and Anti‐corrosion Agent

et al. 2021

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Arginine‐modified polyepoxysuccinic acid (Arg‐PESA) was used as a scale inhibitor to study its anti‐scaling and anti‐corrosion performance. The existence of arginine groups enhances the adsorption and chelation of calcium substances, thus inhibiting the formation of a calcium scale. The effects of temperature, scale inhibitor concentration, pH, and calcium ion concentration on scale inhibition performance were studied. The morphologies and structures of the calcium scale and carbon steel coupons were observed and characterized by spectroscopic and microscopic methods. The interaction between Arg‐PESA and different crystal surfaces of calcium carbonate was simulated by molecular dynamics to elucidate the anti‐scaling mechanism. The addition of Arg‐PESA also significantly enhanced the dispersion of iron oxide.

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“…Water treatment is an important technology to deal with the shortage of water resources [4][5][6]. Among various methods explored for water treatment, the circulating cooling water system is widely utilized in industrial processes [7,8]. However, scale deposition is one of the major problems in this system [9].…”

Section: Introductionmentioning

confidence: 99%

Green and High Effective Scale Inhibitor Based on Ring-Opening Graft Modification of Polyaspartic Acid

2021

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Polyaspartic acid (PASP)-based green scale inhibitor has great potential application in water treatment. Here, we first synthesized PASP in ionic liquid. Then, an effective PASP-based green scale inhibitor was synthesized by ring-opening graft modification of PASP with both aspartic acid (ASP) and monoethanolamine (MEA). Its chemical composition was characterized by gel chromatography (GPC), Fourier transform infrared spectroscopy (FTIR), and 1H nuclear magnetic resonance (1H NMR). Scale inhibition efficiency was measured by static scale inhibition tests. The results showed that the new PASP-based scale inhibitor has high scale inhibition to both CaCO3 and Ca3(PO4)2. When the concentration was increased to 2 mg/L, the inhibition efficiency of the new PASP-based scale inhibitor was 99% for CaCO3, while when the concentration was raised to only 4 mg/L, its inhibition efficiency increased to 100% for Ca3(PO4)2. Scanning electronic microscopy (SEM) and X-ray diffraction (XRD) were used to analyze the changes of crystal structure for CaCO3 and Ca3(PO4)2 after adding the new PASP-based scale inhibitor. The crystal size of CaCO3 and Ca3(PO4)2 became smaller and the crystal form became amorphous after adding the modified PASPs compared with adding pure PASP. Moreover, the modified PASP showed good biodegradation performance.

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Evaluation of Scale and Corrosion Inhibition of Modified Polyaspartic Acid

Cited by 22 publications

References 39 publications

Synthesis and Study of Modified Polyaspartic Acid Coupled Phosphonate and Sulfonate Moieties As Green Oilfield Scale Inhibitors

Synthesis and Study of Modified Polyaspartic Acid Coupled Phosphonate and Sulfonate Moieties As Green Oilfield Scale Inhibitors

Evaluation of Arginine‐Modified Polyepoxysuccinic Acid as Anti‐scaling and Anti‐corrosion Agent

Green and High Effective Scale Inhibitor Based on Ring-Opening Graft Modification of Polyaspartic Acid

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