Adsorption characteristics of clay minerals in shale

作者：Gu, Yang; Ding, Wenlong; Yin, Shuai^*; Yin, Min; Xiao, Zikang

来源：Petroleum Science and Technology, 2018, 36(2): 108-114.

DOI：10.1080/10916466.2017.1405031

• adsorption characteristics
• clay minerals
• pore structure
• potential theory
• the shale

Based on the adsorption potential theory, this paper describes the adsorption characteristics of four kinds of clay minerals, i.e. Montmorillonite, Kaolinite, Chlorite, and Illite, in clay shales, meanwhile adding quartzite as control sample. We focus on adsorption amount a, differential adsorption work A, characteristic energy E, characteristic coefficient n in adsorption potential analysis. The results show that the differential adsorption work decreases as the adsorption energy increases, which can generally represent the change features during each stage; the optimum value of n is around 1.5 for five kinds of inorganic minerals; E slightly decreases as the temperature increases. For clay minerals, the absolute values of adsorption heat and the result of maximum adsorption can meet that Montmorillonite > Kaolinite > Chlorite > Illite.

• 出版日期2018
• 单位西安石油大学; 中国地质大学（北京）