Facile Synthesis of High-Surface-Area Mesoporous MgO with Excellent High-Temperature CO2 Adsorption Potential

被引:57
作者
Hanif, Aamir [1 ]
Dasgupta, Soumen
Nanoti, Anshu
机构
[1] CSIR, Acad Sci & Innovat Res, Indian Inst Petr Campus CSIR IIP, Dehra Dun 248005, Uttar Pradesh, India
关键词
HYDROTALCITE-LIKE COMPOUNDS; CARBON-DIOXIDE; MAGNESIUM-OXIDE; CAPTURE; SORPTION; HYDROXIDE; FTIR;
D O I
10.1021/acs.iecr.6b00647
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Mesoporous magnesium oxide of high surface area (>350 m(2)/g) has been synthesized by a simple ammonia precipitation method from an aqueous magnesium nitrate solution. This material has been evaluated for CO2 adsorption in the temperature and pressure regimes relevant to precombustion capture in an integrated gasification combined cycle scheme. CO2 adsorption capacities were also compared with those of magnesium oxides obtained by other synthetic routes such as hydrothermal urea hydrolysis and direct thermal degradation of magnesium nitrate. Mesoporous magnesium oxide shows a CO2 capacity at high temperatures that is comparable or even exceeds the capacity values for this class of high-temperature CO2 adsorbents reported in the literature so far. The materials studied have been characterized by various characterization techniques like powder X-ray diffraction, surface area, pore-size distribution analysis, scanning electron microscopy, and Fourier transform infrared. A cyclic adsorption/desorption study was also carried out to understand the multicycle stability of the adsorbent for high-temperature CO2 capacity.
引用
收藏
页码:8070 / 8078
页数:9
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