The objective of the present work is to investigate the full phase diagram of a binary system composed of carbon dioxide and a heavy paraffin. An alkane with an odd carbon number was chosen since mixtures of paraffins crystallize in the orthorhombic structure like pure odd paraffins do. The normal-heptadecane was taken into consideration for this study as it has a melting temperature close to the ambient condition (295 K). The work consists in measuring both fluid phase equilibria and fluid-solid phase transition conditions. The measurement of liquid-vapor and liquid - liquid phase transition in the temperature range 273 - 363 K has been made as well as the measurements of solid crystallization up to 70 MPa. The influence of carbon dioxide content has been studied from 0 to 99%.

本工作的目的是研究由二氧化碳和重链烷烃组成的二元系统的全相图。之所以选择碳数为奇数的烷烃，是因为链烷烃的混合物像纯正奇数的链烷烃一样在正交结构中结晶。本研究考虑了正十七烷，因为它的熔融温度接近环境温度（295 K）。这项工作包括测量液相平衡和流固相转变条件。已经进行了在273-363 K温度范围内的液体-蒸汽和液相-液相转变的测量，以及高达70 MPa的固体结晶的测量。已经研究了二氧化碳含量的影响，从0到99％。