ESTONIAN ACADEMY
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eesti teaduste
akadeemia kirjastus
PUBLISHED
SINCE 1984
 
Oil Shale cover
Oil Shale
ISSN 1736-7492 (Electronic)
ISSN 0208-189X (Print)
Impact Factor (2020): 0.934

VARIATION OF THE PORE STRUCTURE DURING MICROWAVE PYROLYSIS OF OIL SHALE; pp. 135–146

Full article in PDF format | doi: 10.3176/oil.2010.2.04

Authors
WANG QING, JIAO GUOJUN, LIU HONGPENG, BAI JINGRU, LI SHAOHUA

Abstract
In this research, semi-coke samples were produced in a modified microwave oven at different final temperatures at a constant incident microwave power (550 W). The pore structure of raw oil shale (OS) and semi-coke samples was measured by the method of low-temperature adsorption of nitrogen. The obtained adsorption/desorption isotherms of these samples were similar and could be categorized as type II isotherms in the IUPAC classification, and all hysteresis loops produced by OS and all semi-coke samples are very similar to H3 hysteresis loops. Specific surface area was calculated based on BET equa­tion, and pore size distribution was calculated by BJH method. The analysis results showed that the final temperature has a great influence on specific surface area, specific pore volume and the development of mesopores. As compared with conventional pyrolysis, pore size distribution curves have two visible peaks near 2 nm and 4 nm.
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