Kinetics and Equilibria of Calcium Lignosulfonate Adsorption and Desorption onto Limestone
Equilibria and kinetics are two basic ingredients for the proper understanding of adsorption and desorption processes between surfactants and rocks. The adsorption and desorption of calcium lignosulfonate (CLS), commonly used as a sacrificial agent in surfactant-based EOR processes, was studied. Equilibrium results showed that CLS adsorption and desorption onto limestone could be described well by the Langmuir isotherm over the tested CLS concentration range, and that increasing concentration increases adsorption density. Increasing flow rate slightly decreased CLS equilibrium adsorption. Increasing both NaCl and CaCl2 concentrations increased adsorption density; however, CaCl2 had a much greater impact on the adsorption. Increasing pH decreased CLS adsorption onto limestone. Desorption was a much slower process than adsorption.
B. Bai and R. B. Grigg, "Kinetics and Equilibria of Calcium Lignosulfonate Adsorption and Desorption onto Limestone," Proceedings of the SPE International Symposium on oilfield Chemistry (2005, The Woodlands, TX), pp. 319-329, Society of Petroleum Engineers (SPE), Feb 2005.
The definitive version is available at http://dx.doi.org/10.2118/93098-MS
SPE International Symposium on oilfield Chemistry (2005: Feb. 2-4, The Woodlands, TX)
Geosciences and Geological and Petroleum Engineering
International Standard Serial Number (ISSN)
Article - Conference proceedings
© 2005 Society of Petroleum Engineers (SPE), All rights reserved.