DOI: 10.1016/j.jcou.2015.11.001
Scopus记录号: 2-s2.0-84957435540
论文题名: Development of mesoporous magnesium oxide-alumina composites for CO2 capture
作者: Wang F. ; Gunathilake C. ; Jaroniec M.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2016
卷: 13 起始页码: 114
结束页码: 118
语种: 英语
英文关键词: High temperature CO2 capture
; Magnesium oxide-alumina composites
; Temperature programmed desorption
Scopus关键词: Alumina
; Aluminum
; Block copolymers
; Desorption
; Flue gases
; Magnesia
; Magnesium
; Mechanical stability
; Self assembly
; Temperature programmed desorption
; Adsorption capacities
; Alumina composites
; Alumina-based composites
; Evaporation induced self assemblies
; High specific surface area
; High temperature
; Large pore volume
; Oxidizing environments
; Carbon dioxide
英文摘要: Mesoporous magnesium oxide-alumina composites were synthesized by evaporation induced self assembly (EISA) in the presence of triblock copolymer Pluronic P123 in absolute ethanol solution. These mesostructures were prepared using Al(NO3)39H2O and Mg(NO3)2·6H2O as alumina and MgO precursors, respectively. Block copolymer was completely removed by thermal treatment of as-synthesized samples at 350 °C in flowing nitrogen. Thermally treated composites displayed relatively high specific surface area and large pore volume. Temperature programmed desorption (TPD) was used to investigate the active sites available on the surface of the aforementioned samples for CO2 sorption at 120 °C. Magnesium oxide-alumina composite samples showed an enhanced CO2 uptake under flue gas conditions (100-150 °C). The sample synthesized from Al(NO3)39H2O) only showed adsorption capacity of about 1.30 mmol/g. Incorporation of 10 molar% of MgO did not significantly increase the CO2 uptake of the alumina-based composite; however, incorporation of 30 molar% of MgO increased CO2 uptake up to 2.08 mmol/g. An increase of the MgO content in the composite caused a gradual enhancement in the CO2 uptake; namely, the composite with 70% of MgO loading showed 2.87 mmol/g CO2 uptake. High thermal and mechanical stability of the composites studied as well as their low cost, good resistance to the corrosion and oxidizing environment make these materials, especially MgO-rich composites, attractive candidates for CO2 capture at flue gas conditions. © 2015 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52926
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Wang F.,Gunathilake C.,Jaroniec M.. Development of mesoporous magnesium oxide-alumina composites for CO2 capture[J]. Journal of CO2 Utilization,2016-01-01,13