<div dir="ltr">Today's Friday seminar at 12:30 is by Sigurður Reynir Gislason on "The state of the Earth´s Carbon cycle. What can we do about it?"<div><br></div><div>See abstract below. <br><div><br></div><div><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Maren Kahl</b> <span dir="ltr"><<a href="mailto:marenk@hi.is">marenk@hi.is</a>></span><br>Date: Mon, Oct 3, 2016 at 12:02 PM<br>Subject: [Jhi] Friday seminar 07.10. 12:30 - Sigurður Reynir Gislason "The state of the Earth´s Carbon cycle. What can we do about it?"<br>To: <a href="mailto:jhi@hi.is">jhi@hi.is</a><br><br><br><div lang="EN-US"><div class="gmail-m_7834641982189815924WordSection1"><p class="MsoNormal">Dear all,<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">our weekly seminar series continues this Friday (07.10.) at 12:30 in the seminar room on the 3<sup>rd</sup> floor with a presentation given by:<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><b>Sigurður Reynir Gislason</b> <u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">“<b>The state of the Earth´s Carbon cycle. What can we do about it?”<u></u><u></u></b></p><p class="MsoNormal">The total remaining CO2 atmospheric emission quota to keep global average temperature increase within 2°C will be used in about 20 years at current emission rates. To reach the 2°C goal, a portfolio of low-carbon technologies needs to be employed over the next decades. This includes increase in the use of renewable and nuclear energy, fuel switching, energy efficiency, and about 80 Giga-tonnes of CO2 captured from the power and industry sectors and stored in rocks before the year 2050. Only about 20 MtCO2 was captured injected in the year 2014.<span class="gmail-m_7834641982189815924apple-converted-space"> </span><u></u><u></u></p><p class="MsoNormal">Much of the security risk associated with geologic carbon storage stems from its buoyancy, which can be eradicated by dissolving CO2 into water prior to or during its injection, thus allowing injection into fractured rocks [1]. We have demonstrated the dissolution of CO2 into water during its injection in less than 5 minutes and mineral storage within basalt in two years at 20–50°C at the CarbFix field injection site in SW Iceland [2, 3].<u></u><u></u></p><p class="MsoNormal">This method requires substantial water, therefore the cost of storing and transporting a tonne of CO2 via the CarbFix method is about twice that of geologic storage via “supercritical” CO2 injection. However, the cost of carbon capture and storage is still dominated worldwide by capture and gas separation [1]. This cost could be lowered by capturing and injecting gas mixtures into rocks as is now being tested at the CarbFix–Sulfix site in SW–Iceland at the Hellisheidi geothermal power plant. Since June 2014 we have injected 8000 tonnes per year of a 60% CO2 and 40% H2S gas mixture, which is dissolved in condensation water from the turbines at 20°C and co–injected with waste water (60–120°C) into the basaltic rock at 700m depth where the temperature is 250°C. After more than two years of near continuous operation, the transmissivity of the injection well is still stable and monitoring data suggests significant mineralisation of the injected gas mixture during this period of injection.<u></u><u></u></p><p class="MsoNormal">[1] Gislason & Oelkers (2014), Science 344, 373–374.<u></u><u></u></p><p class="MsoNormal">[2] Sigfússon et al. (2015), International Journal of Greenhouse Gas Control 37, 213–219<u></u><u></u></p><p class="MsoNormal">[3] Matter et al. (2016). Science 352, 1312-1314.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Looking forward seeing you on Friday.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Best,<u></u><u></u></p><p class="MsoNormal">Maren & Maria<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p></div>
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<br></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div>Deirdre Clark, PhD Research Fellow<br></div>University of Iceland | Háskóli Íslands<br></div><div>Institute of Earth Sciences<br></div><div>Sturlugata 7, Askja, Room 265<br></div><div>101 Reykjavík, Iceland<br><br></div><div>+354 525 5414 (Office)<br>+354 690 5745 (Mobile)<br></div><div><a href="mailto:dec2@hi.is" target="_blank">dec2@hi.is</a><br></div></div></div>
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