Search

Your search keyword '"LU, Shuangfang"' showing total 777 results
Start Over Author "LU, Shuangfang"
777 results on '"LU, Shuangfang"'

1. Revealing crucial effects of reservoir environment and hydrocarbon fractions on fluid behaviour in kaolinite pores

Author

Zhao, Rixin, Xue, Haitao, Lu, Shuangfang, Greenwell, H. Chris, and Erastova, Valentina

Subjects
Condensed Matter - Materials Science
Abstract

Interactions of hydrocarbons (HCs) and clay surfaces are responsible for fluid behaviour within shale reservoirs. These interactions are affected by the diversity of HC components and the variations in environmental conditions. This study examines the interactions between kaolinite clay, featuring two distinct basal surfaces, and an array of HCs. We assess the impact of various molecular structures, functional groups, and environmental conditions (focusing on the reservoir temperature and pressure ranges) on the adsorption selectivity, surface packing, molecular alignment and orientation, and diffusion of HCs. Analyses of molecular interaction energies provide a quantitative elucidation of the adsorption mechanisms of HCs on the different kaolinite surfaces. Our findings suggest that molecular configuration, functional groups, and spatial effects dictate the distribution patterns of HCs for the different kaolinite surfaces. The differences in the interaction energy between various HCs with kaolinite reveal the adsorption strength of different HCs in the order of asphaltenes>heteroatomic HCs>saturated HCs>aromatic HCs. Furthermore, we observe that the adsorptive characteristics are highly temperature-sensitive; with increased temperatures markedly reducing the adsorption amount. Beyond a certain threshold, the effect of pressure rise on the fluid behaviour of HCs is non-negligible and is related to molecular packing and reduced mobility. Simulation results based on actual geological characteristics demonstrate notable adsorption disparities among hydrocarbon components on different kaolinite surfaces, influenced by competitive adsorption and clay surface interactions. Polar surfaces are predominantly occupied by heteroatomic HCs, whereas on non-polar surfaces, asphaltenes and heavy saturated HCs develop multi-layer adsorption structures, with molecules aligned parallel to the surface.

Published
2024
Full Text
View/download PDF

4. Quantum Physisorption of Methane and Carbon Dioxide within Nanoporous Materials

Author

Li, Junqian, Lu, Shuangfang, Liu, Dameng, Ju, Yiwen, Wang, Min, Yao, Yanbin, Cai, Yidong, Zhao, Xuebo, Xue, Haitao, Li, Jijun, Zhao, Jianhua, Li, Wenbiao, and He, Taohua

Subjects
Condensed Matter - Materials Science
Abstract

Although numerous investigations reveal the gas physisorption characteristics of porous materials and a variety of theories have also established to describe gas physisorption during the past century, the essence of physisorption behavior of gas within nanoscale space is still indistinct. We find that the physisorption behavior of complex molecular system of methane and carbon dioxide within nanoporous materials exhibits a quantum effect. Based on this quantum effect, we established a physisorption equation from the perspective of quantum mechanics to re-understand the basic principles of gas physisorption within nanopores. Energy level transition triggers gas physisorption, and non-uniform spatial distribution of energy-quantized molecules within nanopores dominates the gas physisorption behavior. The spatial distribution of gas molecules can be adjusted by temperature, pressure and potential energy field. This result contributes to understand and predict the physisorption behavior of CH4 and CO2 within nanoporous materials., Comment: There are a number of serious mistakes in this paper, and we would like to withdraw the paper to avoid misunderstandings to readers. For example, line 6 on page 5, line 16 on page 7, and line 27 on page 11

Published
2022

Catalog

Books, media, physical & digital resources
See catalog results