A 406-year non-growing-season precipitation reconstruction in the southeastern Tibetan Plateau

	A 406-year non-growing-season precipitation reconstruction in the southeastern Tibetan Plateau
	Keyimu, Maierdang ; Li, Zongshan ; Fu, Bojie; Liu, Guohua ; Zeng, Fanjiang ; Chen, Weiliang ; Fan, Zexin ; Fang, Keyan ; Wu, Xiuchen ; Wang, Xiaochun
	2021-11-19
Source Publication	CLIMATE OF THE PAST
ISSN	0935-9648
Pages	-
Abstract	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.
Department	城市与区域生态国家重点实验室
Keyword	CO (2) capture energy barriers MgO-based adsorbents MgO carbonation surface defects
Document Type	期刊论文
Identifier	https://ir.rcees.ac.cn/handle/311016/46707
Collection	城市与区域生态国家重点实验室
Affiliation	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China 3.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Desert Plant Roots Ecol & Vegeta, Urumqi 830011, Peoples R China 4.Cele Natl Stn Observat & Res Desert Grassland Eco, Cele 848300, Peoples R China 5.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Mengla 666303, Peoples R China 6.[Fang, Keyan 7.Fujian Normal Univ, Coll Geog Sci, Minist Educ, Key Lab Humid Subtrop Ecogeog Proc, Fuzhou 350007, Peoples R China 8.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 9.Northeast Forestry Univ, Coll Forestry, Harbin 150040, Peoples R China
Recommended Citation 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):-.

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