The study on multifunctional aminoalkylenephosphonate-based antiscalant for industrial water systems under harsh conditions

International Journal of Industrial Chemistry

دوره 11، شماره 2، شهریور 2020، صفحه 133-145

نوع مقاله: research article

شناسه دیجیتال (DOI): https://doi.org/10.1007/s40090-020-00208-y

نویسندگان

Musa Mpelwa^{1، 2}؛ Shanfa Tang^{3، 1}؛ Lijun Jin¹

¹School of Petroleum Engineering, Yangtze University, Wuhan, 430100, China

²Chemistry Department, Nyankumbu Secondary School, Geita, P.O. Box 140, Mwanza, Tanzania

³Hubei Cooperative Innovation Center of Unconventional Oil and Gas, Yangtze University, Wuhan, 430100, China

چکیده

Mineral scale deposit is one of the major problems incessantly faced in the oil and gas producing wells and surface facilities, and if not well-handled can cause an unsuccessful petroleum production. To eradicate scale deposits, scale inhibitors (SIs) are commonly deployed into industrial water systems. Because of effectiveness and long squeeze lifetimes, organic phosphonate SIs are extensively used for preventing mineral scale formation in industrial water systems. However, they usually exhibit lower Ca²⁺ and Mg²⁺ tolerances that restrict their applications in harsh conditions where high inhibitory dosages are needed. In this paper, a multifunctional aminoalkylenephosphonate-based antiscalant having higher Ca²⁺ and Mg²⁺ tolerances is studied. The antiscalant was synthesized, characterized (FTIR and NMR spectroscopies), and evaluated in accordance with the NACE Standard Method (TM0374) for preventing CaSO₄ and CaCO₃ formation in the petroleum industry. The effects of inhibitory dosages, water hardness, temperature, incubation period, and pH were studied. We further tested the performance of the antiscalant in simulated field waters. Experimental results show that the multifunctional aminoalkylenephosphonate-based antiscalant has better inhibitory properties as compared to conventional aminoalkylenephosphonate-based SIs. The incorporation of the sulfonate group into the molecule significantly improved the solubility of the antiscalant and hence its tolerances to Ca²⁺ and Mg²⁺ ions. Also, it bolstered thermal stability of the inhibitor. The results from simulated field conditions are promising. The synthesized antiscalant performed superbly than the conventionally aminomethylenephosphonate antiscalants where Ca²⁺ and Mg²⁺ concentrations are challenging.

کلیدواژه‌ها

CaSO4 scale؛ CaCO3 scale؛ Organic phosphonate؛ Threshold inhibition؛ Water hardness