- Title
- ACEME: Direct aqueous mineral carbonation of dunite rock
- Creator
- Rashid, Muhammad I.; Benhelal, Emad; Farhang, Faezeh; Oliver, Timothy K.; Rayson, Mark S.; Brent, Geoff F.; Stockenhuber, Michael; Kennedy, Eric M.
- Relation
- Environmental Progress & Sustainable Energy Vol. 38, Issue 3, no. e13075
- Publisher Link
- http://dx.doi.org/10.1002/ep.13075
- Publisher
- John Wiley & Sons
- Resource Type
- journal article
- Date
- 2019
- Description
- This research explores the use of serpentinized dunite (which is comprised of 61% lizardite) as a feedstock for aqueous mineral carbonation. In initial experiments, dunite was heat-activated (630°C, 4 h), adopting a procedure which is similar to that used for serpentinite to enhance their carbonation reactivity. Heat-activation converts crystalline lizardite mineral into an amorphous, reactive phase, and the carbonation of this heat-activated material resulted in a magnesite yield of 55% compared to 27% obtained with raw dunite under the same reaction conditions. The formation of silanol nests occurred during carbonation of heat-activated dunite as deduced through FTIR and TGA-MS analyses. Samples of dunite were also heat-transformed at high temperatures (800°C, 3 h) to convert lizardite into forsterite, and these samples were also studied as potential feedstocks for mineral carbonation. Heat-activated dunite was found to engender much higher magnesite yields compared to heat-transformed dunite (forsterite rich) and raw dunite. This study suggests that during heat-activation of dunite, as it is for lizardite, conditions should be maintained to avoid forsterite formation.
- Subject
- serpentinized dunite; aqueous mineral carbonation; lizardite; forsterite formation
- Identifier
- http://hdl.handle.net/1959.13/1403807
- Identifier
- uon:35221
- Identifier
- ISSN:1944-7442
- Rights
- This is the peer reviewed version of the following article: Rashid, M.I., Benhelal, E., Farhang, F., Oliver, T.K., Rayson, M.S., Brent, G.F., Stockenhuber, M. and Kennedy, E.M. (2019), ACEME: Direct Aqueous Mineral Carbonation of Dunite Rock. Environ Prog Sustainable Energy, 38: e13075. doi:10.1002/ep.13075. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions
- Language
- eng
- Full Text
- Reviewed
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