文献类型：期刊文献

英文题名：The inhibitory effects of four inhibitors on the solution adsorption of CaCO3 on Fe3O4 and Fe2O3 surfaces

作者：Li, Changjun[1,2];Zhang, Chaoyi[1,2];Zhang, Wuping[3]

机构：[1]Southwest Petr Univ, Sch Petr & Nat Gas Engn, Chengdu 610500, Sichuan, Peoples R China;[2]Southwest Petr Univ, CNPC Key Lab Oil & Gas Storage & Transportat, Chengdu 610500, Sichuan, Peoples R China;[3]East China Univ Sci & Technol, Inst Chem Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：9

外文期刊名：SCIENTIFIC REPORTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000487217200017)】；

语种：英文

摘要：This study presents the inhibitory effects of four scale inhibitors, including polyacrylic acid (PAA), hydrolyzed polymaleic anhydride (HPMA), polyepoxysuccinic acid (PESA) and polyaspartic acid (PASP), on the adsorption of CaCO3 on the surfaces of Fe3O4 and Fe2O3. Samples were characterized using SEM and EDS and the average atomic number ratios of Ca/Fe were calculated. Inhibition effects followed the trend: PESA > PAA > PASP > HPMA and PESA > PASP > HPMA > PAA for Fe3O4 and Fe2O3, respectively. Molecular dynamics simulations based on the adsorption model of the scale inhibitor on the surface and calculations of the adsorption energy between the scale inhibitor molecule and the surface revealed that the relatively high scale inhibitory effect is due to low adsorption energy between the inhibitor molecule and the surface. Density Functional Theory (DFT) calculations of the model after adsorption revealed that the relatively low adsorption energy depends on the number of H-O bonds formed as well as those with higher Mulliken population values between the scale inhibitor and the surface.