Synthesis and Performance Evaluation of Modified Polyaspartic-Acid-Based Scale Inhibitor

WenLong Gao, LiWei Sun, Miao Li, XiAn Ye, QingChun Gao, DongLiang Kong, JunPu An, KuoBo Wang and Fan Yang ()
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WenLong Gao: China National Petroleum Group Great Wall Drilling Engineering Co., Ltd., Panjin 124010, China
LiWei Sun: China National Petroleum Group Great Wall Drilling Engineering Co., Ltd., Panjin 124010, China
Miao Li: China National Petroleum Group Great Wall Drilling Engineering Co., Ltd., Panjin 124010, China
XiAn Ye: China National Petroleum Group Great Wall Drilling Engineering Co., Ltd., Panjin 124010, China
QingChun Gao: China National Petroleum Group Great Wall Drilling Engineering Co., Ltd., Panjin 124010, China
DongLiang Kong: China National Petroleum Group Great Wall Drilling Engineering Co., Ltd., Panjin 124010, China
JunPu An: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
KuoBo Wang: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Fan Yang: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

Energies, 2024, vol. 17, issue 13, 1-12

Abstract: This paper focuses on the selection and application of scale inhibitor by studying the problem of pipeline scaling in geothermal well development. Adding scale inhibitor can effectively reduce the treatment cost and achieve a good scale resistance effect, but the commonly used polyaspartic acid scale inhibitor has problems such as poor scale inhibition effect and large use limitations. Therefore, a new modified polyaspartic acid scale inhibitor (His-Tyr-SA-PASP) was prepared using polysuccinimide (PSI) as the raw material and histidine (His), tyrosine (Tyr), and sulfonic acid (SA) as the modification reagent. When the dosage of His-Tyr-SA-PASP was 8 mg/L, the scale inhibition rate of CaCO 3 was 94.40%. In addition, the scale inhibition effect of His-Tyr-SA-PASP on CaCO 3 was better than that of PASP. At the same time, under the condition of a static experiment at 75 °C, according to the ion concentration of water samples in different scale zones, this paper also identified the ratio of four composite scale inhibitors. When the dosage of compound scale inhibitor was 100 mg/L, Sodium of Polyaspartic Acid–Diethylene Triamine Penta (Methylene Phosphonic Acid)–2-Phosphonobutane-1,2,4-Tricarboxylic Acid–Amino Trimethylene Phosphonic Acid–Copolymer of Maleic and Acrylic Acid = (10:10:5:1:9), (15:10:5:2.5:2.5), (12.5:5:10:1:6.5), and (15:5:10:4:1) and the scale inhibition rate was more than 95%. Under the condition of a dynamic experiment, the optimized composite scale inhibitor still showed a scale inhibition rate of more than 90%. It provides a useful reference for the practical application of water treatment in geothermal wells and has the prospect of industrial application.

Keywords: polyaspartic acid; scale inhibition; pipeline scaling; composite scale inhibitor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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