Solubility of Polyacrylamide in Supercritical Carbon Dioxide

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• 作者：Hai-lun Wang ; Jia-rong Sang ; Lin-tao Guo ; Jing Zhu ; Jun-su Jin
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2017
• 出版时间：January 12, 2017
• 年：2017
• 卷：62
• 期：1
• 页码：341-347
• 全文大小：372K
• ISSN：1520-5134

文摘

To promote the application of polyacrylamide (PAM) in carbon dioxide flooding to enhance oil recovery, the solubility of PAM with different molecular weight (5 million, 7 million, 14 million, g·mol^–1) was measured using dynamic method in supercritical carbon dioxide (SCCO₂) at temperatures of 313, 323, and 333 K and pressures from 9.0 to 18.0 MPa. By comparing the differences of solubility data measured in SCCO₂, the effects of pressure, temperature and molecular weight on the solubility of PAM in SCCO₂ were investigated. The solubility data of PAM in SCCO₂ was correlated with five density-based semiempirical models (Chrastil, A-L, M-T, S-S, and Bartle) and A-L model obtained the best correlated results for PAM with different molecular weight. The self-consistency of PAM solubility was verified by M-T model. The enthalpy values of PAM, including ΔH_t, ΔH_vap, and ΔH_solv, were estimated through Chrastil and Bartle models.