Carbon dioxide (CO 2 ) capture using magnesium oxide (MgO)-based adsorbents at intermediate temperatures has been regarded as a very prospective technology for their relatively high adsorption capacity, low cost, and wide availability. During the past few years, great effort has been devoted to the fabrication of molten salts-modified MgO-based adsorbents. The extraordinary progress achieved by coating with molten salts greatly promotes the CO 2 capture capacity of MgO-based adsorbents. Therefore, we feel it necessary to deliver a timely review on this type of CO 2 capturing materials, which will benefit the researchers working in both academic and industrial areas. In this work, we classified the molten salts-modified MgO adsorbents into four categories: (1) homogenous molten salt-modified MgO adsorbents, (2) molten salt-modified double salts-based MgO adsorbents, (3) mixed molten salts-modified MgO adsorbents, and (4) molten salts-modified MgO-based mixed oxides adsorbents. This contribution critically reviews the recent developments in the synthetic method, adsorption capacity, reaction kinetics, promotion mechanism, operational conditions and regenerability of the molten salts-modified MgO CO 2 adsorbents. The challenges and prospects in this promising field of molten salts-modified MgO CO 2 adsorbents in real applications are also briefly mentioned.
展开▼
机译:在中间温度下使用氧化镁(MgO)的氧化镁(MgO)的二氧化碳(CO 2)捕获已被认为是其具有相对高的吸附能力,低成本和广泛可用性的非常前景技术。在过去几年中,努力致力于制造熔融盐改性的MgO的吸附剂。用熔盐涂层实现的非凡进展大大促进了基于MgO的吸附剂的CO 2捕获能力。因此,我们觉得有必要对这种类型的二氧化碳捕获材料提供及时审查,这将使研究人员有益于学术和工业领域的研究人员。在这项工作中,我们将熔融盐改性的MGO吸附剂分为四类:(1)均匀熔融盐改性的MgO吸附剂,(2)熔融盐改性的双盐的MgO吸附剂,(3)混合熔融盐改性MgO吸附剂,(4)熔融盐改性MgO的混合氧化物吸附剂。这种贡献危重回顾在合成方法中的最近的发展,吸附容量,反应动力学,推进机构,操作条件和熔融盐改性的MgO CO 2的吸附剂的再生性。还简要介绍了实际应用中熔融盐改性的MgO CO 2吸附剂的这一承诺领域的挑战和前景。
展开▼