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  Oil Shale

ISSN 1736-7492 (electronic)  ISSN 0208-189X (print)
Published since 1984

Oil Shale

ISSN 1736-7492 (electronic)  ISSN 0208-189X (print)
Published since 1984

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ORGANIC NITROGEN CONVERSION DURING THE THERMAL DECOMPOSITION OF HUADIAN OIL SHALE OF CHINA; pp. 97–109

(Full article in PDF format) https//doi.org/10.3176/oil.2017.2.01


Authors

XIANGXIN HAN, BIN CHEN, QINGYOU LI, JIANHUI TONG, XIUMIN JIANG

Abstract

Organic nitrogen plays an adverse role in the utilization of oil shale, deactivating catalysts in the shale oil refining process and forming NOX in the combustion of oil shale and shale oil. To have a deep under­standing of its thermochemical transformation during the decomposi­tion of oil shale, the conversion of organic nitrogen is experimentally studied and a set of physical models of nitrogen-containing groups is constructed and solved using the quantum chemical transition state theory (TST) in the Gaussian 09, Revision A.02 package. The results obtained show that three principal nitrogen-containing species – pyrrolic nitrogen, pyridinic nitrogen and amino nitrogen – first crack to nitriles or amino species from the breakup of the C–N bond, and then to HCN and NH3. If attacked by oxygen-con­tain­ing groups, the nitrogen-containing products formed can be further con­verted into NOX. Including also quaternary and chemisorbed NOX in the study, the conversion history of five typical nitrogen-containing groups present in oil shale kerogen is summarized and illustrated.

Keywords

oil shale pyrolysis, organic nitrogen, thermochemical

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