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Continuing role of hydrocarbons and CO2 in any transition to a sustainable...
Tue 25 April 2017, 16:30 – 17:45 BST
'The continuing role of hydrocarbons and CO2 in any transition to a sustainable energy future'
Peter P. Edwards, Professor of Inorganic Chemistry, University of Oxford
Abstract: Flue gas is the largest CO2 source arising from the combustion of fossil fuels. Because the combustion invariably involves air, which contains about 79 volume percent gaseous N2 and is in fact non-combustible during the combustion, therefore, the largest contributor of flue gas from most fossil-fuel combustion is uncombusted nitrogen gas. CO2 often accounts for about 10−25 volume percent or more of the flue gas. This is closely followed in volume by water vapour (H2O) created by the combustion of hydrogen in the fuel with atmospheric oxygen. Large power plants and process furnaces in large refineries, petrochemical and chemical plants, and incinerators burn considerable amounts of fossil fuels, emitting large amounts of flue gas to the ambient atmosphere. In addition, these flue gas emissions can often have temperatures ranging from 150-500 °C, the escaping flue gas, therefore, contains significant amounts of thermal energy, which requires removal for any subsequent carbon capture process. To effectively utilize the CO2, a direct conversion without any capture and separation would be highly desirable. Light alkanes such as ethane and propane as a feedstock step, for their endothermic reaction with CO2, offers an attractive option. Thus, feeding propane into hot flue gas would enable the effective use of the exhaust heat, as well as using CO2 and steam as the oxidant for propane dehydrogenation. This would not only ultimately reduce CO2 emissions, but also avoid the inevitable energy waste in the necessary cooling of the exhaust gas for carbon capture and storage. In this presentation, we will present the feasibility study of CO2 activation directly from flue gas for propane dehydrogenation to yield high-value propylene.
Peter P. Edwards is Professor of Inorganic Chemistry at the University of Oxford, and previously Head of Inorganic Chemistry from 2003-2013. His research interests include metal-insulator transitions, and future energy materials with a particular emphasis on new-generation, high-performance materials for hydrogen production and storage, carbon dioxide activation and utilization, low-cost, high performance semiconductor thin films for solar power applications and high-temperature superconductors. Following BSc and PhD degrees at Salford University, Edwards spent periods at Cornell (concurrently, British Fulbright Scholar and National Science Foundation Fellow), at Cambridge (Lecturer and Director of Studies in Natural Sciences, Jesus College) and Co-Director of the first Interdisciplinary Research Centre in the UK (that in superconductivity), at Birmingham (Professor of Chemistry, and of Materials), before assuming his present position at Oxford in 2003. He was elected Fellow of the Royal Society in 1996 and elected to the German Academy of Sciences, Leopoldina in 2009. In 2012, he presented The Bakerian Prize Lecture of the Royal Society, was elected to an Einstein Professorship of the Chinese Academy of Sciences, and International Member of the American Academy of Arts and Sciences and the American Philosophical Society. He was awarded the Armourers and Brasiers’ Materials Science Venture Prize for his work on transparent conducting oxides. In 2013, he was elected to the Academia Europaea. He is Co-Founder (with T. Xiao and H. Almegren), of the King Abdulaziz City of Science and Technology-Oxford Petrochemical Research Centre (KOPRC), now designated as a Centre of Excellence in Petrochemicals.
You are welcome to join us for prior discussions and afternoon tea in the 'Wessex Restaurant' at 16:00 to 16:25
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