Pore structure and surface properties of diatomite with mechanical grinding and its influence on humidity control performance
,
 
,
 
,
 
,
 
,
 
,
 
 
 
More details
Hide details
1
School of Environment and Resource, Southwest University of Science and Technology
2
School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing
CORRESPONDING AUTHOR
Zhibo Hu   

School of Environment and Resource, Southwest University of Science and Technology
Publication date: 2022-09-09
 
Physicochem. Probl. Miner. Process. 2022;58(6):153509
 
KEYWORDS
TOPICS
ABSTRACT
Mechanical grinding (MG) is an effective method to regulate the pore structure and surface properties of mineral material. Grinding diatomite samples were prepared by horizontal sander under different grinding time. The pore structure and surface properties of grinding samples were characterized systematically by the particle size analysis, low temperature nitrogen adsorption, MIP, fractal theory, XRD, SEM, TEM, FTIR and surface hydroxyl density analysis. The humidity control performance (HCP) of grinding diatomite was tested under different temperature and relative humidity. The relationship among pore structure, surface properties and HCP was analyzed. The results show that macroporous is more easily damaged by mechanical force than mesoporous, and the internal blind holes structure can be opened. The HCP of diatomite is positively correlated with the specific surface area, mesoporous volume, the inhomogeneity of macroporous structure and the number of hydroxyl groups, while negatively correlated with the proportion of macroporous volume.
eISSN:2084-4735
ISSN:1643-1049