Inhibition of Reaction Layer Formation on MgO(100) by Doping with Trace Amounts of Iron

The Journal of Physical Chemistry C, Год журнала: 2025, Номер unknown

Опубликована: Фев. 11, 2025

Despite extensive research on MgO's reactivity in the presence of CO2 under various conditions, little is known about whether impurities incorporated into solid, such as iron, enhance or impede hydroxylation and carbonation reactions. The purity MgO required for successful implementation looping a direct air capture technology affects deployment costs. With this motivation, we tested how iron impacts (100) passivation layer formation ambient conditions by using atomic force microscopy, electron synchrotron-based X-ray scattering. Based microprobe analysis, our samples were 0.5 wt % Mössbauer spectroscopy results indicated that 70% present Fe(II). We find even these low levels dopants impeded both at relative humidities (10%, 33%, 75%, >95%) (33%, surface. Crystalline reaction products formed. Reaction layers sample easily removed exposing to deionized water 2 min. Overall, findings demonstrate slows rate MgO, indicating without preferable mineral applications.

Язык: Английский

Energy-efficient calcination-free mg cement recovered from desalination brine

Desalination, Год журнала: 2025, Номер unknown, С. 118928 - 118928

Опубликована: Апрель 1, 2025

Язык: Английский