Thermal analysis of serpentinites

Ashimov, U. B.; Bolotov, Yu. A.; Arykbaev, R. K.; Shipkov, N. V.

doi:10.1007/bf01280685

Cited by 4 publications

(2 citation statements)

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“…63 A separate study consistently observed a general shrinkage of serpentine structure as function of progress of dehydroxylation. 50 All these manifestations and inferred mobility of the silica layers are in agreement with the initial observations of Ball and Taylor. 55 Overall, literature presents convincing evidence on the presence of intermediates, in conformity with the topotactic nature of serpentine dehydroxylation.…”

Section: Dehydroxylation Intermediatessupporting

confidence: 89%

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Dehydroxylation of serpentine minerals: Implications for mineral carbonation

Dlugogorski

Balucan

2014

Renewable and Sustainable Energy Reviews

111

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This review examines studies on the dehydroxylation of serpentine minerals published in the open literature from 1945 to 2013, with brief description of earlier work.Presently, the energy cost and technological complications, required to amorphise serpentine minerals by dehydroxylation, prevent their large-scale application for sequestering of CO 2 . The focus of the review is on thermal dehydroxylation, although mechanical dehydroxylation by grinding and shock, as well as thermomechanical dehydroxylation are also covered. We discuss the chemical and physical transformations involving the proposed mechanisms, thermal stability, reaction kinetics, the formation of intermediates and products, associated heat requirements, factors that influence the reaction, as well as associated enhancements in both dissolution and carbonation. The primary factor controlling the availability of Mg for either extraction or carbonation is structural disorder. The review demonstrates that activation processes must avoid recrystallisation of disordered phases to fosterite and enstatite, and minimise the partial pressure of water vapour that engenders reverse reaction.

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Section: Dehydroxylation Intermediatessupporting

confidence: 89%

“…Thermodilatometric analysis confirmed that forsterite and enstatite emanate from the early matrix of the intermediate "metaserpentine phase". 50 It was also proposed that dehydroxylation proceeds in a 2-step process, the second stage of which involves the formation of forsterite and enstatite. …”

Section: +mentioning

confidence: 99%