eprintid: 1432897 rev_number: 33 eprint_status: archive userid: 608 dir: disk0/01/43/28/97 datestamp: 2014-06-20 19:10:40 lastmod: 2021-10-18 00:17:14 status_changed: 2014-06-20 19:10:40 type: article metadata_visibility: show item_issues_count: 0 creators_name: Eveleigh, A creators_name: Ladommatos, N creators_name: Balachandran, R creators_name: Marca, A title: Conversion of oxygenated and hydrocarbon molecules to particulate matter using stable isotopes as tracers ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F45 keywords: Carbon-13; IRMS; Isotope tracing; Laminar flow reactor; Pyrolysis note: Copyright © 2014 The Authors. Published by Elsevier Inc. on behalf of The Combustion Institute. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). abstract: Fuels are continuing to be derived from fossil sources, but as production technology improves, biofuels and synthetic fuels are expected to emerge as scalable long-term sources of liquid fuels. Efforts are being made to ensure that this next-generation of fuels is cleaner burning than the last. In order to inform the production and processing of cleaner burning fuels, more needs to be known about how molecular structure influences the formation of pollutant emissions. Reducing airborne quantities of particulate matter (PM) is of particular interest for human health and the environment. This publication presents a C labelling technique, which has been developed and applied to identify the influence of local molecular structure on the formation of PM. The paper applied the technique based on the C stable isotope to trace the conversion of individual carbon atoms to PM in the case of several oxygenated and hydrocarbon molecules. A laminar tube reactor facility has been used for generating and collecting samples of PM under pyrolysis conditions. A number of single-component oxygenated and hydrocarbons (ethanol, propanol, pentanol, cyclopentanol, ethyl acetate, and toluene) have been enriched with C at specific carbon atom locations and the C/C isotope ratios of PM were measured. The contribution to PM of particular carbon atoms within a molecule was evaluated, and the results shed new light of how individual carbon atoms in a molecule convert to PM. It was found that the conversion to PM of different atoms within a molecule varies widely, depending on the identity of their neighbouring moiety. Furthermore, it was shown that oxygen-containing functional groups have a significant influence on the formation of particulates, partly through a reduction in the conversion to PM of carbon atoms, which are adjacent to oxygen atoms. © 2014 The Authors. date: 2014-11-01 official_url: http://dx.doi.org/10.1016/j.combustflame.2014.05.008 vfaculties: VENG oa_status: green full_text_type: pub language: eng primo: open primo_central: open_green verified: verified_manual elements_source: Scopus elements_id: 955660 doi: 10.1016/j.combustflame.2014.05.008 lyricists_name: Balachandran, Ramanarayanan lyricists_name: Eveleigh, Aaron lyricists_name: Ladommatos, Nicos lyricists_id: RBALA57 lyricists_id: AEVEL67 lyricists_id: NLADO43 full_text_status: public publication: Combustion and Flame volume: 161 number: 11 pagerange: 2966-2974 issn: 0010-2180 citation: Eveleigh, A; Ladommatos, N; Balachandran, R; Marca, A; (2014) Conversion of oxygenated and hydrocarbon molecules to particulate matter using stable isotopes as tracers. Combustion and Flame , 161 (11) pp. 2966-2974. 10.1016/j.combustflame.2014.05.008 <https://doi.org/10.1016/j.combustflame.2014.05.008>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/1432897/1/1-s2.0-S0010218014001382-main.pdf