Use this URL to cite or link to this record in EThOS:
Title: Development of a solid state sensor for stratospheric methane and hydrogen
Author: Hill, J. G. T.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 2006
Availability of Full Text:
Full text unavailable from EThOS.
Please contact the current institution’s library for further details.
Methane and water are important trace gases in the stratosphere and by discussing their sources, sinks, chemistry and transport a case will be made for improved measurements in the lower stratosphere and upper troposphere. Various methods of measuring water vapour and methane will be described and a novel technique for measuring combustable hydrocarbons and hydrogen will be introduced. It will be demonstrated that methane and hydrogen can be catalytically oxidising into a stoiciometric amount of water vapour which can then be measured using a frost point hygrometer. The catalyst will need to be kept at ~450°C to get 100% oxidation of the available methane. The experiment results will be complimented with modelling of the oxidation process in the reactor. A laboratory instrument with suitable characteristics to form the basis of a balloon sondé will be presented as will a prototype balloon instrument.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available