Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures
Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures
复制标题
水热法制备中温下具有优异 CO2 吸附潜力的高比表面积介孔 MgO
DOI：
10.3390/catal7040116
复制
发表时间：
2017-04-01
期刊：
影响因子：
3.9
通讯作者：
Wang, Qiang
中科院分区：
文献类型：
--
作者：
Gao, Wanlin;Zhou, Tuantuan;Wang, Qiang
在这项工作中，我们报告了一种新的十二烷基硫酸钠（SDS）辅助氧化镁（MgO）为基础的多孔吸附剂，通过水热法合成的中间体CO2捕获。对于工业MgO，其CO2吸附容量通常小于0.06 mmol g−1，比表面积低至25.1 m2 g−1。通过引入SDS表面活性剂并控制其他合成参数，制备出了层状结构无序的片状MgO纳米片。这种叶片状MgO吸附剂在中等温度（~300 °C）下表现出0.96 mmol g−1的优异CO2容量，比商业轻质MgO高十倍以上。这种新型的介孔MgO吸附剂在多次CO2吸附/脱附循环期间也表现出高稳定性。据信，优异的CO2捕集性能与其321.3 m2 g-1的高比表面积和丰富的表面活性吸附位点有关。这项工作提出了一种新的合成方案MgO基CO2吸附剂在中间温度下，提供了一个有竞争力的候选人捕获CO2从某些吸附增强制氢过程。
In this work, we report on a novel sodium dodecyl sulfate (SDS)-assisted magnesium oxide (MgO)-based porous adsorbent synthesized by hydrothermal method for intermediate CO2 capture. For industrial MgO, its CO2 adsorption capacity is normally less than 0.06 mmol g−1, with a specific surface area as low as 25.1 m2 g−1. Herein, leaf-like MgO nanosheets which exhibited a disordered layer structure were fabricated by the introduction of SDS surfactants and the control of other synthesis parameters. This leaf-like MgO adsorbent showed an excellent CO2 capacity of 0.96 mmol g−1 at moderate temperatures (~300 °C), which is more than ten times higher than that of the commercial light MgO. This novel mesoporous MgO adsorbent also exhibited high stability during multiple CO2 adsorption/desorption cycles. The excellent CO2 capturing performance was believed to be related to its high specific surface area of 321.3 m2 g−1 and abundant surface active adsorption sites. This work suggested a new synthesis scheme for MgO based CO2 adsorbents at intermediate temperatures, providing a competitive candidate for capturing CO2 from certain sorption enhanced hydrogen production processes.