The University of Southampton
University of Southampton Institutional Repository

In situ carbonation of peridotite for CO2 storage

Kelemen, Peter B. and Matter, Jürg (2008) In situ carbonation of peridotite for CO2 storage Proceedings of the National Academy of Sciences, 105, (45), pp. 17295-17300. (doi:10.1073/pnas.0805794105).

Record type: Article

Abstract

The rate of natural carbonation of tectonically exposed mantle peridotite during weathering and low-temperature alteration can be enhanced to develop a significant sink for atmospheric CO2. Natural carbonation of peridotite in the Samail ophiolite, an uplifted slice of oceanic crust and upper mantle in the Sultanate of Oman, is surprisingly rapid. Carbonate veins in mantle peridotite in Oman have an average 14C age of ?26,000 years, and are not 30–95 million years old as previously believed. These data and reconnaissance mapping show that ?104 to 105 tons per year of atmospheric CO2 are converted to solid carbonate minerals via peridotite weathering in Oman. Peridotite carbonation can be accelerated via drilling, hydraulic fracture, input of purified CO2 at elevated pressure, and, in particular, increased temperature at depth. After an initial heating step, CO2 pumped at 25 or 30 °C can be heated by exothermic carbonation reactions that sustain high temperature and rapid reaction rates at depth with little expenditure of energy. In situ carbonation of peridotite could consume >1 billion tons of CO2 per year in Oman alone, affording a low-cost, safe, and permanent method to capture and store atmospheric CO2.

Full text not available from this repository.

More information

e-pub ahead of print date: 3 November 2008
Published date: 11 November 2008
Keywords: alteration and weathering, carbon capture, exothermic, carbon sequestration, mineral
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 349454
URI: http://eprints.soton.ac.uk/id/eprint/349454
ISSN: 0027-8424
PURE UUID: 2e455223-7604-4e79-9bf8-c9b8dd8d2a55

Catalogue record

Date deposited: 05 Mar 2013 11:32
Last modified: 18 Jul 2017 04:41

Export record

Altmetrics

Contributors

Author: Peter B. Kelemen
Author: Jürg Matter

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×