Oil shale ash

an inorganic byproduct of burning oil shale and retored shale

has a potential use

such as building material

chemical filling material

adsorbent

etc. To obtain oil shale ash with higher porosity

the pore structure of oil shale ash produced by the combustion of oil shale was measured by using the N2 isothermal adsorption/desorption method.As a result of comparison between oil shale ash samples prepared under different combustion conditions in terms of pore structure

the oil shale ash

formed under both higher heating rate and particle final temperature lower than the melting point of oil shale ash

had a larger pore volume and specific surface area and could be utilized in industries.