Competitive adsorption behaviors of carbon dioxide and n-dodecane mixtures in 13X molecular sieve

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhu, Chaofan^1 ; Dong, Mingzhe^2 ; Gong, Houjian^1

School of Petroleum Engineering, China University of Petroleum (East China), Qingdao

266580, China^1

Department of Chemical and Petroleum Engineering, University of Calgary, Calgary

AB

T2N 1N4, Canada^2

关键词: Adsorption equilibria;    Adsorption mechanism;    Adsorption properties;    Competitive adsorption;    New experimental method;    Oil recovery mechanisms;    Reservoir temperatures;    Straight-forward method;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/2/022079/pdf
DOI  :  10.1088/1755-1315/108/2/022079

来源: IOP

【 摘 要 】

The CO2cyclic injection has been proven to be effective to enhance tight oil recovery under constant reservoir temperature and down hole pressure conditions. However, the enhance tight oil recovery mechanism was unclear, especially the adsorption of the CO2and alkane in the surface. Therefore, it is great important to study the adsorption mechanism of CO2and alkane mixtures in tight oil. In this study, a new experimental method and apparatus have been designed to test the change of the mole fraction of CO2and n-C12before and after the adsorption equilibrium. Then, the adsorption amount of CO2and n-C12was obtained by a mathematical method. Moreover, the adsorption character of CO2and n-C12mixtures in 13X molecular sieve and the effect of pressure on the adsorption and amount were studied. The results show that the adsorption of CO2and the desorption of n-C12follow the Langmuir adsorption. This study provides a straightforward method to experimentally determine the adsorption properties of the tight oil, which can be used to evaluate enhanced tight oil recovery by CO2injection.