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Received April 20, 2017
Accepted November 5, 2017
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Transformation of nitrogen-containing compounds in atmospheric residue by hydrotreating
College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China 1State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China 2Fushun Research Institute of Petroleum and Petrochemicals, SINOPEC, Fushun 113001, China
liumeifushun@163.com
Korean Journal of Chemical Engineering, February 2018, 35(2), 375-382(8), 10.1007/s11814-017-0305-9
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Abstract
Atmospheric residue from Saudi Arabia light crude oil was subjected to the hydrotreating process in a continuous fixed-bed reactor with hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) catalysts. The detailed molecular composition of the polar heteroatom species in the feedstock and products was determined by electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) combined with other analytical methods. The ESI FT-ICR MS analysis indicates that the N1 class species have the highest relative abundance. In the hydrotreating process, small neutral N1 class species with high aromaticity and short side chains showed the highest relative abundance and were defined as easily removable compounds. High aromaticity and small molecule basic N1 compounds exhibited higher catalytic activity towards hydrogenation. The N1S1 class species were converted to the N1 class species, or even hydrocarbons, by the preferential removal of the sulfur atoms. Most of the N1O1 class species were difficult to remove, because of their stable chemical structure.
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References
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Qian K, Chang SH, Anal. Chem., 64, 2327 (1992)
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