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首页> 外文期刊>Journal of industrial and engineering chemistry >Phase equilibria for the binary mixture of n-vinyl pyrrolidone and N,N-dimethylacrylamide in supercritical carbon dioxide
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Phase equilibria for the binary mixture of n-vinyl pyrrolidone and N,N-dimethylacrylamide in supercritical carbon dioxide

机译:正丙基吡咯烷酮和N,N-二甲基丙烯酰胺在超临界二氧化碳中的二元混合物的相平衡

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摘要

High pressure phase equilibria for the (carbon dioxide + n-vinyl pyrrolidone) and (carbon dioxide + N,N-dimethylacrylamide) systems are measured in a static apparatus at five temperatures of 313.2, 333.2, 353.2, 373.2 and 393.2 K and pressures up to 24.66 MPa. These two systems exhibit maximums in pressure at temperatures between the critical temperatures of carbon dioxide and n-vinyl pyrrolidone or N,N-dimethylacrylamide. The solubility of n-vinyl pyrrolidone and N,N-dimethylacryIamide for the carbon dioxide + n-vinyl pyrrolidone and carbon dioxide + N,N-dimethylacryIamide systems increases as the temperature increases at a fixed pressure. The carbon dioxide + n-vinyl pyrrolidone and carbon dioxide + N,N-dimethylacrylamide systems exhibit type-I phase behavior. The experimental results for the carbon dioxide + n-vinyl pyrrolidone and carbon dioxide + N,N-dimethyIacrylamide systems are correlated with the Peng-Robinson equation of state using a mixing rule including binary interaction parameters (k_(ij) and η_(ij)).
机译:(二氧化碳+正乙烯基吡咯烷酮)和(二氧化碳+ N,N-二甲基丙烯酰胺)系统的高压相平衡是在静态装置中在313.2、333.2、353.2、373.2和393.2 K的五个温度下进行的,测量压力为至24.66 MPa。在二氧化碳和正乙烯基吡咯烷酮或N,N-二甲基丙烯酰胺的临界温度之间的温度下,这两个系统表现出最大压力。随着温度在固定压力下升高,正乙烯基吡咯烷酮和N,N-二甲基丙烯酰胺体系对二氧化碳+正乙烯基吡咯烷酮和二氧化碳+ N,N-二甲基丙烯酰胺体系的溶解度增加。二氧化碳+正乙烯基吡咯烷酮和二氧化碳+ N,N-二甲基丙烯酰胺体系表现出I型相行为。使用包含二元相互作用参数(k_(ij)和η_(ij)的混合规则,将二氧化碳+正乙烯基吡咯烷酮和二氧化碳+ N,N-二甲基丙烯酰胺体系的实验结果与Peng-Robinson状态方程相关联)。

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