Chemistry 2011.org
Chemistry2011.org
All About Chemistry... 2011 and beyond
Energy, Energy, Energy, energy, energy

Related Stories

Environmental hazards or energy solutions? Geophysicists size up energy resources, carbon capture and fracking

Feb. 12, 2013 — Decisions about future energy challenges are too often hindered by propaganda, half-truths and a limited grasp of the science that informs the choice and use of hydrocarbon and other resources, according to delegates at the annual conference of the British Geophysical Association (BGA), to take place in the Geological Society, Burlington House in London Feb. 14 and 15.

For example, rather than being a quick fix that helps cut carbon dioxide emissions, poor quality carbon capture and storage may actually make things worse whereas 'fracking', the controversial gas and oil extraction technique, may prove to be vital in the years ahead. Leaders from universities and industry will come together to discuss these issues at the BGA meeting, where delegates will discuss the sustainability, security and risks of future energy choices.

Scientists at the conference will argue that evidence from geophysics must be part of the political decision making process, as the UK and other countries consider how to maintain the stable energy supply we depend on while simultaneously reducing the emission of carbon dioxide, one of the key greenhouse gases responsible for global warming.

At first sight, carbon capture and storage (CCS) appears to be a technological fix that allows us to carry on using the fossil fuels oil, gas and coal (hydrocarbons) to generate energy. CCS power stations could pump the resulting greenhouse gases to underground reservoirs rather than releasing them into the atmosphere.

In reality, it is not so simple. Even handling the greenhouse gases emitted by fossil fuel burning means storing something close to 3.5 billion tonnes of carbon dioxide per year, a volume comparable to the 27 billion barrels of oil produced annually. And for the storage to be worthwhile the gases must also be stored in reservoirs that leak at rates of less than 1% per thousand years, at which point their carbon footprint effectively matches that of renewable energy sources. Geophysical modelling and monitoring, to be discussed at the meeting, is needed to ensure reliable storage for the thousands of years required.

A related discussion centres on 'fracking', potentially a huge new energy source for the UK, but one that is struggling for public acceptance despite the promise it holds of lower energy prices and better energy security. Until now media coverage of fracking has centred on the perceived environmental risks, such as earthquakes and contamination of groundwater.

In his keynote address to the BGA meeting, Professor Mark Zoback of Stanford University points to the data from the ten years of gas production by fracking at 150,000 sites across the United States. US Geological Survey information demonstrates that earthquakes can result from fracking, but that serious effects can be avoided with careful choice of location. Ironically European countries that have banned fracking are now purchasing US coal for power stations and driving up carbon dioxide emissions as a result.

Intriguingly, Prof. Zoback draws a comparison between fracking and CCS. The techniques are similar -- pumping fluid into rocks -- and he argues therefore carry the same risks of earthquakes in some rock types and locations. The problem is that these tremors could then release carbon dioxide too quickly, well above the 1% loss per thousand years needed for CCS to be effective. If carbon capture and storage is to have any effect on greenhouse gas emissions, reservoir locations will need to be chosen with care.

Other sessions at the meeting will cover risks associated with nuclear power in the light of Fukushima, renewable energy from wind turbines and criteria for nuclear waste storage sites.

Meeting organiser Prof. Mike Kendall of the University of Bristol commented: "A reliable, affordable and environmentally friendly supply of energy is one of the major challenges facing society. And although there are numerous different options, there is no single silver bullet that will solve this challenge. The issues are clouded by misinformation and a poor public understanding of the underpinning science. Geophysicists have a key role to play in helping clarify these complex issues and can help governments make the right decisions on how we supply energy to homes and businesses in the 21st century."


Note: If no author is given, the source is cited instead.

The source of this article can be found at: energy-solutions-geophysicists-size-up-energy-resources-carbon-capture-and-fracking' target='_blank'>http://www.ras.org.uk/news-and-press/224-news-2013/2219-environmental-hazards-or-energy-solutions-geophysicists-size-up-energy-resources-carbon-capture-and-fracking

Share this story with your friends!

Social Networking

Please recommend us on Facebook, Twitter and more:

Other social media tools

Global Partners
Feedback

Tell us what you think of Chemistry 2011 -- we welcome both positive and negative comments. Have any problems using the site? Questions?

About us

Chemistry2011 is an informational resource for students, educators and the self-taught in the field of chemistry. We offer resources such as course materials, chemistry department listings, activities, events, projects and more along with current news releases.

Events & Activities

Are you interested in listing an event or sharing an activity or idea? Perhaps you are coordinating an event and are in need of additional resources? Within our site you will find a variety of activities and projects your peers have previously submitted or which have been freely shared through creative commons licenses. Here are some highlights: Featured Idea 1, Featured Idea 2.

About you

Ready to get involved? The first step is to sign up by following the link: Join Here. Also don’t forget to fill out your profile including any professional designations.

Global Partners