Imperial College London
Alternate

Prof Klaus Hellgardt

Faculty of Engineering, Department of Chemical Engineering

Professor of Chemical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 5577k.hellgardt

 
 
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Location

 

417AACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Daud:2021:10.1016/j.supflu.2020.105050,
author = {Daud, ARM and Berrueco, C and Hellgardt, K and Millan, M and Kandiyoti, R},
doi = {10.1016/j.supflu.2020.105050},
journal = {The Journal of Supercritical Fluids},
pages = {105050--105050},
title = {Oxidative cracking of three to five-member ring polycyclic aromatic hydrocarbons in subcritical and supercritical water},
url = {http://dx.doi.org/10.1016/j.supflu.2020.105050},
volume = {167},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Polycyclic aromatic hydrocarbons (PAH) are refractory structures common in heavy hydrocarbons. Thermal cracking in supercritical water (SCW) is limited but PAH can be completely oxidised if an oxidant is added. By restricting oxidant supply to substoichiometric amounts, this study aims to achieve partial oxidation as a route to useful chemicals, such as mono- and bi-aromatics. Oxidative cracking reactions of anthracene, pyrene and benzo[a]pyrene in subcritical and SCW were studied. PAH conversions well above 90 % were achieved along a fast heating ramp in a batch reactor. This quick initial oxidation took place predominantly in inner rings, weakening the aromatic structure and increasing cracking reactivity. This oxidation-cracking pathway became dominant in the SCW region, producing mostly oxygenated compounds with fewer aromatic rings. On the other hand, competing reactions leading to polymerization were favoured in the subcritical water region. PAH reactivity was found to follow the order anthracene > benzo[a]pyrene > pyrene.
AU  - Daud,ARM
AU  - Berrueco,C
AU  - Hellgardt,K
AU  - Millan,M
AU  - Kandiyoti,R
DO  - 10.1016/j.supflu.2020.105050
EP  - 105050
PY  - 2021///
SN  - 0896-8446
SP  - 105050
TI  - Oxidative cracking of three to five-member ring polycyclic aromatic hydrocarbons in subcritical and supercritical water
T2  - The Journal of Supercritical Fluids
UR  - http://dx.doi.org/10.1016/j.supflu.2020.105050
UR  - https://www.sciencedirect.com/science/article/pii/S0896844620303016?via%3Dihub
VL  - 167
ER  -
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