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Professor Chris Rhodes

Professor Chris Rhodes

Professor Chris Rhodes is a writer and researcher. He studied chemistry at Sussex University, earning both a B.Sc and a Doctoral degree (D.Phil.); rising to…

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UK Plans to Secure Strategic Metals Vital to Energy Security

Not only are supplies of oil and natural gas under imminent threat of failing to meet demand for them, but so is a whole range of precious metals, along with indium, gallium and germanium and other vital elements such as phosphorus and helium. A report [1] from the Science and Technology Committee, advised by the Royal Society of Chemistry [2], warns that if the U.K. does not secure supplies of strategic metals, its economic growth will be severely jeopardized. Of particular concern are indium, used in touch screens and liquid crystal displays, and rare earth elements (REEs) particularly neodymium and dysprosium, used to fabricate highly efficient magnets for electric cars and wind turbines. Platinum group metals are an issue too, used in catalytic converters and fuel cells.

As is true of oil and gas, and indeed world population, such resources are not evenly distributed around the globe, and for example 80% of available new platinum is extracted from just two mines in South Africa. 92% of the niobium used in the world (for superconducting magnets and highly heat-resisting superalloys e.g. in jet-engines and rocket subassemblies) is exported from Brazil, and 97% of REEs are presently supplied from China. In developing a low-carbon transport infrastructure, it is proposed that biofuels should be used principally for aviation where there is no practical alternative to liquid fuels. Thus, it is ventured, electric cars will become increasingly important in providing personalised transport while avoiding the use of petroleum or natural-gas based fuels. The knock-on effect is that new sources of lithium must be found along with the means to mine and process the metal, plus the inauguration of recycling technology for lithium.

One can immediately take issue with the practicalities of both arms of this scheme, however. Roughly one fifth of all fuel in the UK is used for aircraft, or around 13 million tonnes. At a yield of 952 L/ha and a density of 0.88 g/cm3, to produce this much biodiesel would take 15.5 million hectares of arable land, of which the UK has only 6.5 million hectares. Thus if we were to stop growing food crops entirely and just rapeseed, we could still only fuel 42% of our aviation fleet. It is obvious that just a few percent at best of our current number of planes can be kept in the air by means of biofuels. Clearly, the days of cheap air-travel are numbered and this may be one reason why the coalition government has scrapped plans to build the controversial and vexed third runway at Heathrow Airport.

Given the 30 million cars on the roads here currently fuelled by oil, the case for a wide-scale implementation of electric-cars might appear compelling. However, the lead-in time to make a dent in that number of vehicles and the 60 million tonnes of crude oil used for fuel would be decades at best, even if the necessary supplies of REEs, lithium and overall manufacturing capacity for them could be achieved. The most practical use for electricity is to power mass transportation, e.g. tramways and railway networks rather than individual vehicles.

(1) http://www.parliament.uk/business/committees/committees-a-z/commons-select/science-and-technology-committee/news/110517-sims-report-published/

(2) Davis, E. (2011) "Critical Thinking.” http://www.rsc.org/chemistryworld/Issues/2011/January/CriticalThinking.asp

By. Professor Chris Rhodes

Professor Chris Rhodes is a writer and researcher. He studied chemistry at Sussex University, earning both a B.Sc and a Doctoral degree (D.Phil.); rising to become the youngest professor of physical chemistry in the U.K. at the age of 34.
A prolific author, Chris has published more than 400 research and popular science articles (some in national newspapers: The Independent and The Daily Telegraph)
He has recently published his first novel, "University Shambles" was published in April 2009 (Melrose Books). http://universityshambles.com




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  • Anonymous on July 09 2011 said:
    How much coal does it take to generate the electricity to drive an electric car 1km at 60kmh?

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