期刊
MATERIALS LETTERS
卷 308, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.matlet.2021.131125
关键词
Dypingite; Hydromagnesite; Thermal stability; CO2 mineral sequestration
资金
- JSPS KAKENHI [JP20K04124]
Dypingite is a common phase of crystalline magnesium carbonate hydrates and its thermal transformation process was studied using high-temperature X-ray diffraction and synchrotron X-ray scattering. Dypingite transforms to hydromagnesite below 100 degrees C, while an amorphous phase is predominant at 250-350 degrees C, and crystallizes to MgO at 400 degrees C. Despite its similar local structure to hydromagnesite, dypingite exhibits a different thermal transformation pathway.
Dypingite is one of the most common phases of crystalline magnesium carbonate hydrates, which are considered potential targets for CO2 mineral sequestration. Ex-situ high-temperature X-ray diffraction and ex-situ high temperature synchrotron X-ray scattering experiments with pair distribution function analysis were used to explore the thermal transformation process of dypingite. Dypingite transformed to hydromagnesite until 100 degrees C, but its local structure remained unchanged. At the temperature range from 250 degrees C to 350 degrees C, where the amorphous phase was predominant, the second and third coordination spheres were continuously modified and crystallized to MgO at 400 degrees C. Although the local structure of dypingite was as that of hydromagnesite, dypingite exhibited a different thermal transformation pathway from hydromagnesite.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据