Investigation of the combustion of methane using CuO for radiocarbon dating

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dc.contributor.authorYang, Ben_AU
dc.contributor.authorSmith, AMen_AU
dc.date.accessioned2025-03-14T04:33:10Zen_AU
dc.date.available2025-03-14T04:33:10Zen_AU
dc.date.issued2019-09-15en_AU
dc.date.statistics2025-03en_AU
dc.description.abstractFor the combustion of methane (CH4) gas to carbon dioxide (CO2), we investigated the use of copper oxide (CuO) as the source of oxygen, using our type 2 Micro Conventional Furnaces (MCF-II), traditionally used for the reduction of CO2 to graphite for AMS measurement Yang and Smith, 2017 [1]. Experiments showed that both graphite and CH4 can be oxidised to CO2 rapidly at a temperature at 780 °C. The reaction is complete within just a few minutes for graphite and within about one hour for CH4 gas. However, this method is only suitable for combustion of CH4 when the concentration >3% due to the small internal volume of MCF-II. To combust gases of lower CH4 concentration, we installed a gas circulation loop with additional components including 1) a novel, newly designed MCF-III with a dual tube furnace for heating 6 mm OD quartz tubes up to 850 °C; 2) a gas circulating unit comprising a miniature diaphragm pump and flow meter along with a needle valve for adjusting gas flow rate; 3) differently sized gas storage tubes and bags, permitting optimisation of the carbon sample size; 4) a water trap and miniature CO2 gas traps −65 °C and −150 °C respectively Yang et al., 2013 [2]. This system is also suitable for collecting CO2 from air at atmospheric concentrations. It also has the flexibility to assemble a specific gas trapping/combustion system to suit the composition of individual gas samples. We report on the early performance with some samples and our evaluation of the cross contamination between CO2 and CH4 based AMS measurement of a set of mixing gas CO2/CH4/N2 samples. Crown Copyright © 2018 Published by Elsevier B.V.en_AU
dc.description.sponsorshipWe acknowledge the financial support (Portal number 10106) from the Australian Government for the Centre for Accelerator Science at ANSTO through the National Collaborative Research Infrastructure Strategy (NCRIS), Australia. We are very grateful for discussions with Mr Alan Williams concerning safety and experimental details for the combustion of CH4 gas.en_AU
dc.identifier.citationYang, B., & Smith, A. M. (2019). Investigation of the combustion of methane using CuO for radiocarbon dating. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 455, 165-170. doi:10.1016/j.nimb.2018.12.018en_AU
dc.identifier.issn0168-583Xen_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atomsen_AU
dc.identifier.pagination165-170en_AU
dc.identifier.urihttps://doi.org/10.1016/j.nimb.2018.12.018en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16064en_AU
dc.identifier.volume455en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectAcceleratorsen_AU
dc.subjectMass spectroscopyen_AU
dc.subjectCarbon 14en_AU
dc.subjectMethaneen_AU
dc.subjectCarbon dioxideen_AU
dc.subjectCombustionen_AU
dc.subjectBosch processen_AU
dc.subjectCopper oxidesen_AU
dc.subjectANSTOen_AU
dc.subjectAustralian organizationsen_AU
dc.subjectStable isotopesen_AU
dc.subjectGraphiteen_AU
dc.subjectTemperature rangeen_AU
dc.titleInvestigation of the combustion of methane using CuO for radiocarbon datingen_AU
dc.typeJournal Articleen_AU
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