A 406-year non-growing-season precipitation reconstruction in the southeastern Tibetan Plateau
文献类型：期刊论文
| 作者 | Keyimu, Maierdang; Li, Zongshan; Fu, Bojie ; Liu, Guohua; Zeng, Fanjiang; Chen, Weiliang; Fan, Zexin; Fang, Keyan; Wu, Xiuchen; Wang, Xiaochun
|
| 刊名 | CLIMATE OF THE PAST
 |
| 出版日期 | 2021-11-19 |
| 页码 | - |
| 关键词 | CO (2) capture energy barriers MgO-based adsorbents MgO carbonation surface defects |
| ISSN号 | 0935-9648 |
| 英文摘要 | The optimization of MgO-based adsorbents as advanced CO2-capture materials is predominantly focused on their molten-salt modification, for which theoretical and experimental contributions provide great insights for their high CO2-capture performance. The underlying mechanism of the promotion effect of the molten salt on CO2 capture, however, is a topic of controversy. Herein, advanced experimental characterization techniques, including in situ environmental transmission electron microscopy (eTEM) and CO2 chemisorption by diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS), transient O-18-isotopic exchange, and density functional theory (DFT), are employed to elucidate the mechanism of the CO2 interaction with molten-salt-modified MgO in the 250-400 degrees C range. Herein, eTEM studies using low (2-3 mbar) and high (700 mbar) CO2 pressures illustrate the dynamic evolution of the molten NaNO3 salt promoted and unpromoted MgO carbonation with high magnification (<50 nm). The formation of O-18-NaNO3 (use of O-18(2)) and (COO)-O-16-O-18 following CO2 interaction, verifies the proposed reaction path: conversion of NO3- (NO3- -> NO2+ + O2-), adsorption of NO2+ on MgO with significant weakening of CO2 adsorption strength, and formation of [Mg2+ horizontal ellipsis O2-] ion pairs preventing the development of an impermeable MgCO3 shell, which largely increases the rate of bulk MgO carbonation. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/46707]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Mengla 666303, Peoples R China 2.[Fang, Keyan 3.Fujian Normal Univ, Coll Geog Sci, Minist Educ, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350007, Peoples R China 4.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 5.Northeast Forestry Univ, Coll Forestry, Harbin 150040, Peoples R China 6.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 7.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China 8.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Desert Plant Roots Ecol & Vegeta, Urumqi 830011, Peoples R China 9.Cele Natl Stn Observat & Res Desert Grassland Eco, Cele 848300, Peoples R China |
| 推荐引用方式 GB/T 7714 | Keyimu, Maierdang,Li, Zongshan,Fu, Bojie,et al. A 406-year non-growing-season precipitation reconstruction in the southeastern Tibetan Plateau[J]. CLIMATE OF THE PAST,2021:-. |
| APA | Keyimu, Maierdang.,Li, Zongshan.,Fu, Bojie.,Liu, Guohua.,Zeng, Fanjiang.,...&Wang, Xiaochun.(2021).A 406-year non-growing-season precipitation reconstruction in the southeastern Tibetan Plateau.CLIMATE OF THE PAST,-. |
| MLA | Keyimu, Maierdang,et al."A 406-year non-growing-season precipitation reconstruction in the southeastern Tibetan Plateau".CLIMATE OF THE PAST (2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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