Abstract

HERRERA, Julia et al. Design of mixture experiments for the analysis of viscosity behavior of sulfonated polyacrylamide solutions (ATBS) with changes in salinity, hardness, and polymer concentration. Dyna rev.fac.nac.minas [online]. 2022, vol.89, n.221, pp.60-67.  Epub Sep 14, 2022. ISSN 0012-7353.  https://doi.org/10.15446/dyna.v89n221.100020.

A simple centroid mixture design (SCMD) method was used to determine the effect of the salinity and hardness of preparation water on final viscosity of a polymer solution with Acrylamide-Tert-butyl-Sulfonated units (ATBS). The experimental results of SCMD were used to build a special quadratic model and a numerical model was implemented for determining the polymer concentration necessary to reach the desired viscosity, depending on the salinity and hardness of the preparation water. Furthermore, the numerical model developed was validated with experimental data from the literature. It can predict the required concentration of a modified polymer (ATBS) to achieve the desired injection viscosity of the polymeric solution, with 95% reliability in the ranges evaluated. The Newton-Raphson numerical model developed using an SMCD is the first reported in the literature that allows determining the ATBS polymer concentration necessary to define the viscosity range.

Keywords : ATBS; sulfonated polyacrylamide; salinity; hardness; SCMD.

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